{"id":3638,"date":"2014-10-16T00:04:56","date_gmt":"2014-10-15T16:04:56","guid":{"rendered":"http:\/\/rmohan.com\/?p=3638"},"modified":"2014-10-16T00:05:13","modified_gmt":"2014-10-15T16:05:13","slug":"logical-volume-manager","status":"publish","type":"post","link":"https:\/\/mohan.sg\/?p=3638","title":{"rendered":"Logical Volume Manager"},"content":{"rendered":"

Server:\u00a0<\/strong> Centos Logical Volume<\/strong>
\ndiskserver.rmohan.com (Centos 6.5)\u00a0 = 192.168.1.6<\/strong><\/p>\n

Disk to use:<\/strong>
\n\u00a0Disk \/dev\/sdb: 50GB\u00a0 DISK A<\/strong>
\n\u00a0Disk \/dev\/sdc: 50GB\u00a0 DISK B<\/strong>
\n\u00a0Disk \/dev\/sdd: 50GB\u00a0 DISK C<\/strong><\/p>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n

\"Image<\/a> \"Image<\/a> \"Image<\/a>
\nDisk \/dev\/sdb: 53.7 GB, 53687091200 bytes
\n255 heads, 63 sectors\/track, 6527 cylinders
\nUnits = cylinders of 16065 * 512 = 8225280 bytes
\nSector size (logical\/physical): 512 bytes \/ 512 bytes
\nI\/O size (minimum\/optimal): 512 bytes \/ 512 bytes
\nDisk identifier: 0x00000000
\nDisk \/dev\/sdc: 53.7 GB, 53687091200 bytes
\n255 heads, 63 sectors\/track, 6527 cylinders
\nUnits = cylinders of 16065 * 512 = 8225280 bytes
\nSector size (logical\/physical): 512 bytes \/ 512 bytes
\nI\/O size (minimum\/optimal): 512 bytes \/ 512 bytes
\nDisk identifier: 0x00000000
\nDisk \/dev\/sdd: 53.7 GB, 53687091200 bytes
\n255 heads, 63 sectors\/track, 6527 cylinders
\nUnits = cylinders of 16065 * 512 = 8225280 bytes
\nSector size (logical\/physical): 512 bytes \/ 512 bytes
\nI\/O size (minimum\/optimal): 512 bytes \/ 512 bytes
\nDisk identifier: 0x00000000<\/p>\n

fdisk -cu\u00a0 \/dev\/sdb
\n[root@diskserver ~]# fdisk -cu\u00a0 \/dev\/sdb
\nDevice contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel
\nBuilding a new DOS disklabel with disk identifier 0x50497d5f.
\nChanges will remain in memory only, until you decide to write them.
\nAfter that, of course, the previous content won’t be recoverable.<\/p>\n

Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite)<\/p>\n

Command (m for help): n
\nCommand action
\ne\u00a0\u00a0 extended
\np\u00a0\u00a0 primary partition (1-4)
\np
\nPartition number (1-4): 1
\nFirst sector (2048-104857599, default 2048):
\nUsing default value 2048
\nLast sector, +sectors or +size{K,M,G} (2048-104857599, default 104857599):
\nUsing default value 104857599<\/p>\n

Command (m for help): t
\nSelected partition 1
\nHex code (type L to list codes): 8e
\nChanged system type of partition 1 to 8e (Linux LVM)<\/p>\n

Command (m for help): w
\nThe partition table has been altered!<\/p>\n

Calling ioctl() to re-read partition table.
\nSyncing disks.<\/p>\n

fdisk -cu\u00a0 \/dev\/sdc<\/p>\n

fdisk -cu\u00a0 \/dev\/sdd
\nroot@diskserver ~]# fdisk -cu\u00a0 \/dev\/sdd
\nDevice contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel
\nBuilding a new DOS disklabel with disk identifier 0x1f69e4f5.
\nChanges will remain in memory only, until you decide to write them.
\nAfter that, of course, the previous content won’t be recoverable.<\/p>\n

Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite)<\/p>\n

Command (m for help): n
\nCommand action
\ne\u00a0\u00a0 extended
\np\u00a0\u00a0 primary partition (1-4)
\np
\nPartition number (1-4): 1
\nFirst sector (2048-104857599, default 2048):
\nUsing default value 2048
\nLast sector, +sectors or +size{K,M,G} (2048-104857599, default 104857599):
\nUsing default value 104857599<\/p>\n

Command (m for help): t
\nSelected partition 1
\nHex code (type L to list codes): 8e
\nChanged system type of partition 1 to 8e (Linux LVM)<\/p>\n

Command (m for help): w
\nThe partition table has been altered!<\/p>\n

Calling ioctl() to re-read partition table.
\nSyncing disks.<\/p>\n

[root@diskserver ~]# pvcreate \/dev\/sdb1
\nPhysical volume “\/dev\/sdb1” successfully created
\n[root@diskserver ~]# pvcreate \/dev\/sdc1
\ndev_is_mpath: failed to get device for 8:33
\nPhysical volume “\/dev\/sdc1” successfully created
\n[root@diskserver ~]# pvcreate \/dev\/sdd1
\ndev_is_mpath: failed to get device for 8:49
\nPhysical volume “\/dev\/sdd1” successfully created<\/p>\n

[root@diskserver ~]# vgcreate vg01 \/dev\/sdb1 \/dev\/sdc1
\nVolume group “vg01” successfully created
\n[root@diskserver ~]# lvcreate –extents 100%FREE –name lv_test vg01
\nLogical volume “lv_test” created<\/p>\n

[root@diskserver ~]# mkfs.ext4 \/dev\/mapper\/vg01-lv_test
\nmke2fs 1.41.12 (17-May-2010)
\nFilesystem label=
\nOS type: Linux
\nBlock size=4096 (log=2)
\nFragment size=4096 (log=2)
\nStride=0 blocks, Stripe width=0 blocks
\n6553600 inodes, 26212352 blocks
\n1310617 blocks (5.00%) reserved for the super user
\nFirst data block=0
\nMaximum filesystem blocks=4294967296
\n800 block groups
\n32768 blocks per group, 32768 fragments per group
\n8192 inodes per group
\nSuperblock backups stored on blocks:
\n32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
\n4096000, 7962624, 11239424, 20480000, 23887872<\/p>\n

Writing inode tables: done
\nCreating journal (32768 blocks): done
\nWriting superblocks and filesystem accounting information: done<\/p>\n

This filesystem will be automatically checked every 32 mounts or
\n180 days, whichever comes first.\u00a0 Use tune2fs -c or -i to override.<\/p>\n

[root@diskserver ~]# mkdir \/media\/my_disk
\n[root@diskserver ~]# mount \/dev\/mapper\/vg01-lv_test \/media\/my_disk\/
\n[root@diskserver ~]# df -H
\nFilesystem\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Size\u00a0 Used Avail Use% Mounted on
\n\/dev\/mapper\/vg_diskserver-lv_root
\n52G\u00a0 1.1G\u00a0\u00a0 48G\u00a0\u00a0 3% \/
\ntmpfs\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 4.1G\u00a0\u00a0\u00a0\u00a0 0\u00a0 4.1G\u00a0\u00a0 0% \/dev\/shm
\n\/dev\/sda1\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 508M\u00a0\u00a0 58M\u00a0 425M\u00a0 12% \/boot
\n\/dev\/mapper\/vg_diskserver-lv_home
\n5.1G\u00a0 145M\u00a0 4.7G\u00a0\u00a0 4% \/home
\n\/dev\/mapper\/vg01-lv_test
\n106G\u00a0 197M\u00a0 101G\u00a0\u00a0 1% \/media\/my_disk
\n[root@diskserver ~]# df -h
\nFilesystem\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Size\u00a0 Used Avail Use% Mounted on
\n\/dev\/mapper\/vg_diskserver-lv_root
\n48G\u00a0 1.1G\u00a0\u00a0 45G\u00a0\u00a0 3% \/
\ntmpfs\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 3.8G\u00a0\u00a0\u00a0\u00a0 0\u00a0 3.8G\u00a0\u00a0 0% \/dev\/shm
\n\/dev\/sda1\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 485M\u00a0\u00a0 55M\u00a0 405M\u00a0 12% \/boot
\n\/dev\/mapper\/vg_diskserver-lv_home
\n4.7G\u00a0 138M\u00a0 4.4G\u00a0\u00a0 4% \/home
\n\/dev\/mapper\/vg01-lv_test
\n99G\u00a0 188M\u00a0\u00a0 94G\u00a0\u00a0 1% \/media\/my_disk<\/p>\n

[root@diskserver ~]# dd if=\/dev\/zero of=\/media\/my_disk\/noodles.log bs=1572864000 count=1
\n1+0 records in
\n1+0 records out
\n1572864000 bytes (1.6 GB) copied, 7.80047 s, 202 MB\/s<\/p>\n

[root@diskserver ~]# pvcreate \/dev\/sdd1
\nPhysical volume “\/dev\/sdd1” successfully created
\n[root@diskserver ~]# vgextend vg01 \/dev\/sdd1
\nVolume group “vg01” successfully extended
\n[root@diskserver ~]#<\/p>\n

[root@diskserver ~]# vgdisplay -v vg01
\nUsing volume group(s) on command line
\nFinding volume group “vg01”
\n— Volume group —
\nVG Name\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 vg01
\nSystem ID
\nFormat\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 lvm2
\nMetadata Areas\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 3
\nMetadata Sequence No\u00a0 3
\nVG Access\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 read\/write
\nVG Status\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 resizable
\nMAX LV\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0
\nCur LV\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 1
\nOpen LV\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 1
\nMax PV\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0
\nCur PV\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 3
\nAct PV\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 3
\nVG Size\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 149.99 GiB
\nPE Size\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 4.00 MiB
\nTotal PE\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 38397
\nAlloc PE \/ Size\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 25598 \/ 99.99 GiB
\nFree\u00a0 PE \/ Size\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 12799 \/ 50.00 GiB
\nVG UUID\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 mOZfFu-K2kJ-iD4i-GkD0-4yLa-zPOE-WGfCnd<\/p>\n

— Logical volume —
\nLV Path\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/dev\/vg01\/lv_test
\nLV Name\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 lv_test
\nVG Name\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 vg01
\nLV UUID\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 hHBSUc-bdg0-eg3K-8eWb-A7pm-pcX8-ikLId9
\nLV Write Access\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 read\/write
\nLV Creation host, time diskserver, 2014-10-16 07:05:28 +0800
\nLV Status\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 available
\n# open\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 1
\nLV Size\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 99.99 GiB
\nCurrent LE\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 25598
\nSegments\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 2
\nAllocation\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 inherit
\nRead ahead sectors\u00a0\u00a0\u00a0\u00a0 auto
\n– currently set to\u00a0\u00a0\u00a0\u00a0 256
\nBlock device\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 253:3<\/p>\n

— Physical volumes —
\nPV Name\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/dev\/sdb1
\nPV UUID\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 NaqfCR-EM8Q-LTHp-vQZf-5mSi-tTF2-kClwyJ
\nPV Status\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 allocatable
\nTotal PE \/ Free PE\u00a0\u00a0\u00a0 12799 \/ 0<\/p>\n

PV Name\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/dev\/sdc1
\nPV UUID\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Gm32iH-i5FJ-BfSp-3SBw-XjJ3-jAcA-grQUdr
\nPV Status\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 allocatable
\nTotal PE \/ Free PE\u00a0\u00a0\u00a0 12799 \/ 0<\/p>\n

PV Name\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/dev\/sdd1
\nPV UUID\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 jYNKlQ-T5oK-Hw4M-6uyj-ZoJq-4NSJ-AGzYOw
\nPV Status\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 allocatable
\nTotal PE \/ Free PE\u00a0\u00a0\u00a0 12799 \/ 12799<\/p>\n

[root@diskserver ~]# vgextend vg01 \/dev\/sdd1
\nPhysical volume ‘\/dev\/sdd1’ is already in volume group ‘vg01’
\nUnable to add physical volume ‘\/dev\/sdd1’ to volume group ‘vg01’.
\n[root@diskserver ~]#<\/p>\n

[root@diskserver ~]# vgdisplay -v vg01
\nUsing volume group(s) on command line
\nFinding volume group “vg01”
\n— Volume group —
\nVG Name\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 vg01
\nSystem ID
\nFormat\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 lvm2
\nMetadata Areas\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 3
\nMetadata Sequence No\u00a0 3
\nVG Access\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 read\/write
\nVG Status\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 resizable
\nMAX LV\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0
\nCur LV\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 1
\nOpen LV\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 1
\nMax PV\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0
\nCur PV\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 3
\nAct PV\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 3
\nVG Size\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 149.99 GiB
\nPE Size\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 4.00 MiB
\nTotal PE\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 38397
\nAlloc PE \/ Size\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 25598 \/ 99.99 GiB
\nFree\u00a0 PE \/ Size\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 12799 \/ 50.00 GiB
\nVG UUID\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 mOZfFu-K2kJ-iD4i-GkD0-4yLa-zPOE-WGfCnd<\/p>\n

— Logical volume —
\nLV Path\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/dev\/vg01\/lv_test
\nLV Name\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 lv_test
\nVG Name\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 vg01
\nLV UUID\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 hHBSUc-bdg0-eg3K-8eWb-A7pm-pcX8-ikLId9
\nLV Write Access\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 read\/write
\nLV Creation host, time diskserver, 2014-10-16 07:05:28 +0800
\nLV Status\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 available
\n# open\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 1
\nLV Size\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 99.99 GiB
\nCurrent LE\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 25598
\nSegments\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 2
\nAllocation\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 inherit
\nRead ahead sectors\u00a0\u00a0\u00a0\u00a0 auto
\n– currently set to\u00a0\u00a0\u00a0\u00a0 256
\nBlock device\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 253:3<\/p>\n

— Physical volumes —
\nPV Name\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/dev\/sdb1
\nPV UUID\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 NaqfCR-EM8Q-LTHp-vQZf-5mSi-tTF2-kClwyJ
\nPV Status\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 allocatable
\nTotal PE \/ Free PE\u00a0\u00a0\u00a0 12799 \/ 0<\/p>\n

PV Name\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/dev\/sdc1
\nPV UUID\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Gm32iH-i5FJ-BfSp-3SBw-XjJ3-jAcA-grQUdr
\nPV Status\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 allocatable
\nTotal PE \/ Free PE\u00a0\u00a0\u00a0 12799 \/ 0<\/p>\n

PV Name\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/dev\/sdd1
\nPV UUID\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 jYNKlQ-T5oK-Hw4M-6uyj-ZoJq-4NSJ-AGzYOw
\nPV Status\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 allocatable
\nTotal PE \/ Free PE\u00a0\u00a0\u00a0 12799 \/ 12799<\/p>\n

[root@diskserver ~]# pvs -o+pv_used
\nPV\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 VG\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Fmt\u00a0 Attr PSize\u00a0 PFree\u00a0 Used
\n\/dev\/sda2\u00a0 vg_diskserver lvm2 a–\u00a0 59.51g\u00a0\u00a0\u00a0\u00a0 0\u00a0 59.51g
\n\/dev\/sdb1\u00a0 vg01\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 lvm2 a–\u00a0 50.00g\u00a0\u00a0\u00a0\u00a0 0\u00a0 50.00g
\n\/dev\/sdc1\u00a0 vg01\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 lvm2 a–\u00a0 50.00g\u00a0\u00a0\u00a0\u00a0 0\u00a0 50.00g
\n\/dev\/sdd1\u00a0 vg01\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 lvm2 a–\u00a0 50.00g 50.00g\u00a0\u00a0\u00a0\u00a0 0
\n[root@diskserver ~]# pvmove \/dev\/sdc1
\n\/dev\/sdc1: Moved: 0.0%
\n\/dev\/sdc1: Moved: 17.1%
\n\/dev\/sdc1: Moved: 34.1%
\n\/dev\/sdc1: Moved: 51.1%
\n\/dev\/sdc1: Moved: 68.1%
\n\/dev\/sdc1: Moved: 84.6%
\n\/dev\/sdc1: Moved: 100.0%
\n[root@diskserver ~]#
\nroot@diskserver ~]# pvs -o+pv_used
\nPV\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 VG\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Fmt\u00a0 Attr PSize\u00a0 PFree\u00a0 Used
\n\/dev\/sda2\u00a0 vg_diskserver lvm2 a–\u00a0 59.51g\u00a0\u00a0\u00a0\u00a0 0\u00a0 59.51g
\n\/dev\/sdb1\u00a0 vg01\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 lvm2 a–\u00a0 50.00g\u00a0\u00a0\u00a0\u00a0 0\u00a0 50.00g
\n\/dev\/sdc1\u00a0 vg01\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 lvm2 a–\u00a0 50.00g 50.00g\u00a0\u00a0\u00a0\u00a0 0
\n\/dev\/sdd1\u00a0 vg01\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 lvm2 a–\u00a0 50.00g\u00a0\u00a0\u00a0\u00a0 0\u00a0 50.00g
\n[root@diskserver ~]#
\n[root@diskserver ~]# vgreduce vg01 \/dev\/sdc1
\nRemoved “\/dev\/sdc1” from volume group “vg01”
\n[root@diskserver ~]#
\n[root@diskserver ~]# cat \/media\/my_disk\/myfile.txt
\nmy file
\n[root@diskserver ~]# cat \/media\/my_disk\/
\nlost+found\/\u00a0 myfile.txt\u00a0\u00a0 noodles.log
\n[root@diskserver ~]# cat \/media\/my_disk\/noodles.log
\n^C
\n[root@diskserver ~]# du -hs \/media\/my_disk\/noodles.log
\n1.5G\u00a0\u00a0\u00a0 \/media\/my_disk\/noodles.log
\n[root@diskserver ~]#
\nroot@diskserver ~]# vgdisplay -vv vg01
\nSetting activation\/monitoring to 1
\nSetting global\/locking_type to 1
\nSetting global\/wait_for_locks to 1
\nFile-based locking selected.
\nSetting global\/locking_dir to \/var\/lock\/lvm
\nSetting global\/prioritise_write_locks to 1
\nUsing volume group(s) on command line
\nFinding volume group “vg01”
\nLocking \/var\/lock\/lvm\/V_vg01 RB
\n\/dev\/ram0: No label detected
\n\/dev\/root: size is 102236160 sectors
\n\/dev\/root: size is 102236160 sectors
\n\/dev\/root: No label detected
\n\/dev\/ram1: No label detected
\n\/dev\/sda1: No label detected
\n\/dev\/vg_diskserver\/lv_swap: size is 12582912 sectors
\n\/dev\/vg_diskserver\/lv_swap: size is 12582912 sectors
\n\/dev\/vg_diskserver\/lv_swap: No label detected
\n\/dev\/ram2: No label detected
\n\/dev\/sda2: lvm2 label detected at sector 1
\n\/dev\/vg_diskserver\/lv_home: size is 9977856 sectors
\n\/dev\/vg_diskserver\/lv_home: size is 9977856 sectors
\n\/dev\/vg_diskserver\/lv_home: No label detected
\n\/dev\/ram3: No label detected
\n\/dev\/vg01\/lv_test: size is 209698816 sectors
\n\/dev\/vg01\/lv_test: size is 209698816 sectors
\n\/dev\/vg01\/lv_test: No label detected
\n\/dev\/ram4: No label detected
\n\/dev\/ram5: No label detected
\n\/dev\/ram6: No label detected
\n\/dev\/ram7: No label detected
\n\/dev\/ram8: No label detected
\n\/dev\/ram9: No label detected
\n\/dev\/ram10: No label detected
\n\/dev\/ram11: No label detected
\n\/dev\/ram12: No label detected
\n\/dev\/ram13: No label detected
\n\/dev\/ram14: No label detected
\n\/dev\/ram15: No label detected
\n\/dev\/sdb1: lvm2 label detected at sector 1
\n\/dev\/sdc1: lvm2 label detected at sector 1
\n\/dev\/sdd1: lvm2 label detected at sector 1
\n— Volume group —
\nVG Name\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 vg01
\nSystem ID
\nFormat\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 lvm2
\nMetadata Areas\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 2
\nMetadata Sequence No\u00a0 7
\nVG Access\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 read\/write
\nVG Status\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 resizable
\nMAX LV\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0
\nCur LV\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 1
\nOpen LV\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 1
\nMax PV\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0
\nCur PV\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 2
\nAct PV\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 2
\nVG Size\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 99.99 GiB
\nPE Size\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 4.00 MiB
\nTotal PE\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 25598
\nAlloc PE \/ Size\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 25598 \/ 99.99 GiB
\nFree\u00a0 PE \/ Size\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0 \/ 0
\nVG UUID\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 mOZfFu-K2kJ-iD4i-GkD0-4yLa-zPOE-WGfCnd<\/p>\n

— Logical volume —
\nglobal\/lvdisplay_shows_full_device_path not found in config: defaulting to 0
\nLV Path\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/dev\/vg01\/lv_test
\nLV Name\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 lv_test
\nVG Name\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 vg01
\nLV UUID\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 hHBSUc-bdg0-eg3K-8eWb-A7pm-pcX8-ikLId9
\nLV Write Access\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 read\/write
\nLV Creation host, time diskserver, 2014-10-16 07:05:28 +0800
\nLV Status\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 available
\n# open\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 1
\nLV Size\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 99.99 GiB
\nCurrent LE\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 25598
\nSegments\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 2
\nAllocation\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 inherit
\nRead ahead sectors\u00a0\u00a0\u00a0\u00a0 auto
\n– currently set to\u00a0\u00a0\u00a0\u00a0 256
\nBlock device\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 253:3<\/p>\n

— Physical volumes —
\nPV Name\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/dev\/sdb1
\nPV UUID\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 NaqfCR-EM8Q-LTHp-vQZf-5mSi-tTF2-kClwyJ
\nPV Status\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 allocatable
\nTotal PE \/ Free PE\u00a0\u00a0\u00a0 12799 \/ 0<\/p>\n

PV Name\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/dev\/sdd1
\nPV UUID\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 jYNKlQ-T5oK-Hw4M-6uyj-ZoJq-4NSJ-AGzYOw
\nPV Status\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 allocatable
\nTotal PE \/ Free PE\u00a0\u00a0\u00a0 12799 \/ 0<\/p>\n

Unlocking \/var\/lock\/lvm\/V_vg01<\/p>\n

[root@diskserver ~]# pvs
\nPV\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 VG\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Fmt\u00a0 Attr PSize\u00a0 PFree
\n\/dev\/sda2\u00a0 vg_diskserver lvm2 a–\u00a0 59.51g\u00a0\u00a0\u00a0\u00a0 0
\n\/dev\/sdb1\u00a0 vg01\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 lvm2 a–\u00a0 50.00g\u00a0\u00a0\u00a0\u00a0 0
\n\/dev\/sdc1\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 lvm2 a–\u00a0 50.00g 50.00g
\n\/dev\/sdd1\u00a0 vg01\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 lvm2 a–\u00a0 50.00g\u00a0\u00a0\u00a0\u00a0 0
\n[root@diskserver ~]# vgs
\nVG\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 #PV #LV #SN Attr\u00a0\u00a0 VSize\u00a0 VFree
\nvg01\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 2\u00a0\u00a0 1\u00a0\u00a0 0 wz–n- 99.99g\u00a0\u00a0\u00a0 0
\nvg_diskserver\u00a0\u00a0 1\u00a0\u00a0 3\u00a0\u00a0 0 wz–n- 59.51g\u00a0\u00a0\u00a0 0
\n[root@diskserver ~]# lvs
\nLV\u00a0\u00a0\u00a0\u00a0\u00a0 VG\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Attr\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 LSize\u00a0 Pool Origin Data%\u00a0 Move Log Cpy%Sync Convert
\nlv_test vg01\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 -wi-ao—- 99.99g
\nlv_home vg_diskserver -wi-ao—-\u00a0 4.76g
\nlv_root vg_diskserver -wi-ao—- 48.75g
\nlv_swap vg_diskserver -wi-ao—-\u00a0 6.00g
\n[root@diskserver ~]#<\/p>\n

[root@diskserver ~]# lvdisplay
\n— Logical volume —
\nLV Path\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/dev\/vg01\/lv_test
\nLV Name\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 lv_test
\nVG Name\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 vg01
\nLV UUID\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 hHBSUc-bdg0-eg3K-8eWb-A7pm-pcX8-ikLId9
\nLV Write Access\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 read\/write
\nLV Creation host, time diskserver, 2014-10-16 07:05:28 +0800
\nLV Status\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 available
\n# open\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 1
\nLV Size\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 99.99 GiB
\nCurrent LE\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 25598
\nSegments\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 2
\nAllocation\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 inherit
\nRead ahead sectors\u00a0\u00a0\u00a0\u00a0 auto
\n– currently set to\u00a0\u00a0\u00a0\u00a0 256
\nBlock device\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 253:3<\/p>\n

— Logical volume —
\nLV Path\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/dev\/vg_diskserver\/lv_root
\nLV Name\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 lv_root
\nVG Name\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 vg_diskserver
\nLV UUID\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 ORCwGE-5W6s-kvcs-5oy9-HcMZ-1zLK-5YtebD
\nLV Write Access\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 read\/write
\nLV Creation host, time diskserver, 2014-10-16 06:23:36 +0800
\nLV Status\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 available
\n# open\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 1
\nLV Size\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 48.75 GiB
\nCurrent LE\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 12480
\nSegments\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 1
\nAllocation\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 inherit
\nRead ahead sectors\u00a0\u00a0\u00a0\u00a0 auto
\n– currently set to\u00a0\u00a0\u00a0\u00a0 256
\nBlock device\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 253:0<\/p>\n

— Logical volume —
\nLV Path\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/dev\/vg_diskserver\/lv_home
\nLV Name\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 lv_home
\nVG Name\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 vg_diskserver
\nLV UUID\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 CCuLFi-SQfO-wCrH-Paic-QRRE-2B05-oRvruC
\nLV Write Access\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 read\/write
\nLV Creation host, time diskserver, 2014-10-16 06:23:41 +0800
\nLV Status\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 available
\n# open\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 1
\nLV Size\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 4.76 GiB
\nCurrent LE\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 1218
\nSegments\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 1
\nAllocation\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 inherit
\nRead ahead sectors\u00a0\u00a0\u00a0\u00a0 auto
\n– currently set to\u00a0\u00a0\u00a0\u00a0 256
\nBlock device\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 253:2<\/p>\n

— Logical volume —
\nLV Path\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/dev\/vg_diskserver\/lv_swap
\nLV Name\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 lv_swap
\nVG Name\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 vg_diskserver
\nLV UUID\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 041w0e-XJsi-BLuJ-5G1U-c2Im-6dza-f1t5cD
\nLV Write Access\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 read\/write
\nLV Creation host, time diskserver, 2014-10-16 06:23:42 +0800
\nLV Status\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 available
\n# open\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 1
\nLV Size\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 6.00 GiB
\nCurrent LE\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 1536
\nSegments\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 1
\nAllocation\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 inherit
\nRead ahead sectors\u00a0\u00a0\u00a0\u00a0 auto
\n– currently set to\u00a0\u00a0\u00a0\u00a0 256
\nBlock device\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 253:1<\/p>\n

[root@diskserver ~]#lvdisplay
\nroot@diskserver ~]# df -TH
\nFilesystem\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Type\u00a0\u00a0 Size\u00a0 Used Avail Use% Mounted on
\n\/dev\/mapper\/vg_diskserver-lv_root
\next4\u00a0\u00a0\u00a0 52G\u00a0 1.1G\u00a0\u00a0 48G\u00a0\u00a0 3% \/
\ntmpfs\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 tmpfs\u00a0 4.1G\u00a0\u00a0\u00a0\u00a0 0\u00a0 4.1G\u00a0\u00a0 0% \/dev\/shm
\n\/dev\/sda1\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 ext4\u00a0\u00a0 508M\u00a0\u00a0 58M\u00a0 425M\u00a0 12% \/boot
\n\/dev\/mapper\/vg_diskserver-lv_home
\next4\u00a0\u00a0 5.1G\u00a0 145M\u00a0 4.7G\u00a0\u00a0 4% \/home
\n\/dev\/mapper\/vg01-lv_test
\next4\u00a0\u00a0 106G\u00a0 1.8G\u00a0\u00a0 99G\u00a0\u00a0 2% \/media\/my_disk
\n[root@diskserver ~]# e2fsck -ff \/dev\/vg01\/lv_test
\ne2fsck 1.41.12 (17-May-2010)
\nPass 1: Checking inodes, blocks, and sizes
\nPass 2: Checking directory structure
\nPass 3: Checking directory connectivity
\nPass 4: Checking reference counts
\nPass 5: Checking group summary information
\n\/dev\/vg01\/lv_test: 13\/6553600 files (0.0% non-contiguous), 843351\/26212352 blocks
\n[root@diskserver ~]# resize2fs \/dev\/vg01\/lv_test\u00a0 50G
\nresize2fs 1.41.12 (17-May-2010)
\nResizing the filesystem on \/dev\/vg01\/lv_test to 13107200 (4k) blocks.
\nThe filesystem on \/dev\/vg01\/lv_test is now 13107200 blocks long.<\/p>\n

root@diskserver ~]# lvreduce -L -50G \/dev\/vg01\/lv_test
\nWARNING: Reducing active logical volume to 49.99 GiB
\nTHIS MAY DESTROY YOUR DATA (filesystem etc.)
\nDo you really want to reduce lv_test? [y\/n]: y
\nReducing logical volume lv_test to 49.99 GiB
\nLogical volume lv_test successfully resized
\n[root@diskserver ~]#
\n[root@diskserver ~]# lvdisplay vg01
\n— Logical volume —
\nLV Path\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/dev\/vg01\/lv_test
\nLV Name\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 lv_test
\nVG Name\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 vg01
\nLV UUID\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 hHBSUc-bdg0-eg3K-8eWb-A7pm-pcX8-ikLId9
\nLV Write Access\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 read\/write
\nLV Creation host, time diskserver, 2014-10-16 07:05:28 +0800
\nLV Status\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 available
\n# open\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0
\nLV Size\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 49.99 GiB
\nCurrent LE\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 12798
\nSegments\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 1
\nAllocation\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 inherit
\nRead ahead sectors\u00a0\u00a0\u00a0\u00a0 auto
\n– currently set to\u00a0\u00a0\u00a0\u00a0 256
\nBlock device\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 253:3<\/p>\n

[root@diskserver ~]# resize2fs \/dev\/mapper\/vg01-lv_test
\nresize2fs 1.41.12 (17-May-2010)
\nResizing the filesystem on \/dev\/mapper\/vg01-lv_test to 13105152 (4k) blocks.
\nThe filesystem on \/dev\/mapper\/vg01-lv_test is now 13105152 blocks long.<\/p>\n

[root@diskserver my_disk]# df -TH
\nFilesystem\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Type\u00a0\u00a0 Size\u00a0 Used Avail Use% Mounted on
\n\/dev\/mapper\/vg_diskserver-lv_root
\next4\u00a0\u00a0\u00a0 52G\u00a0 1.1G\u00a0\u00a0 48G\u00a0\u00a0 3% \/
\ntmpfs\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 tmpfs\u00a0 4.1G\u00a0\u00a0\u00a0\u00a0 0\u00a0 4.1G\u00a0\u00a0 0% \/dev\/shm
\n\/dev\/sda1\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 ext4\u00a0\u00a0 508M\u00a0\u00a0 58M\u00a0 425M\u00a0 12% \/boot
\n\/dev\/mapper\/vg_diskserver-lv_home
\next4\u00a0\u00a0 5.1G\u00a0 145M\u00a0 4.7G\u00a0\u00a0 4% \/home
\n\/dev\/mapper\/vg01-lv_test
\next4\u00a0\u00a0\u00a0 53G\u00a0 1.8G\u00a0\u00a0 49G\u00a0\u00a0 4% \/media\/my_disk
\n[root@diskserver my_disk]#<\/p>\n

[root@diskserver ~]# lvextend -l +4607 \/dev\/mapper\/vg01-lv_test
\nExtending logical volume lv_test to 67.99 GiB
\nLogical volume lv_test successfully resized
\n[root@diskserver ~]# lvextend -l +4607 \/dev\/mapper\/vg01-lv_test
\nExtending logical volume lv_test to 85.98 GiB
\nLogical volume lv_test successfully resized
\n[root@diskserver ~]# resize2fs \/dev\/vg
\nvg01\/\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 vga_arbiter\u00a0\u00a0\u00a0 vg_diskserver\/
\n[root@diskserver ~]# resize2fs \/dev\/vg01\/lv_test
\nresize2fs 1.41.12 (17-May-2010)
\nPlease run ‘e2fsck -f \/dev\/vg01\/lv_test’ first.<\/p>\n

[root@diskserver ~]# e2fsck -f \/dev\/vg01\/lv_test
\ne2fsck 1.41.12 (17-May-2010)
\nPass 1: Checking inodes, blocks, and sizes
\nPass 2: Checking directory structure
\nPass 3: Checking directory connectivity
\nPass 4: Checking reference counts
\nPass 5: Checking group summary information
\n\/dev\/vg01\/lv_test: 13\/3276800 files (0.0% non-contiguous), 635701\/13105152 blocks
\n[root@diskserver ~]# resize2fs \/dev\/vg01\/lv_test
\nresize2fs 1.41.12 (17-May-2010)
\nResizing the filesystem on \/dev\/vg01\/lv_test to 22540288 (4k) blocks.
\nThe filesystem on \/dev\/vg01\/lv_test is now 22540288 blocks long.<\/p>\n","protected":false},"excerpt":{"rendered":"

Server: Centos Logical Volume diskserver.rmohan.com (Centos 6.5) = 192.168.1.6<\/p>\n

Disk to use: Disk \/dev\/sdb: 50GB DISK A Disk \/dev\/sdc: 50GB DISK B Disk \/dev\/sdd: 50GB DISK C<\/p>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n

Disk \/dev\/sdb: 53.7 GB, 53687091200 bytes 255 heads, 63 sectors\/track, 6527 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5,4,50],"tags":[],"_links":{"self":[{"href":"https:\/\/mohan.sg\/index.php?rest_route=\/wp\/v2\/posts\/3638"}],"collection":[{"href":"https:\/\/mohan.sg\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mohan.sg\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mohan.sg\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mohan.sg\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3638"}],"version-history":[{"count":2,"href":"https:\/\/mohan.sg\/index.php?rest_route=\/wp\/v2\/posts\/3638\/revisions"}],"predecessor-version":[{"id":3643,"href":"https:\/\/mohan.sg\/index.php?rest_route=\/wp\/v2\/posts\/3638\/revisions\/3643"}],"wp:attachment":[{"href":"https:\/\/mohan.sg\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3638"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mohan.sg\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3638"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mohan.sg\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3638"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}