RAID (Redundant Array of Inexpensive Disks)<\/p>\n
Create 3 partitions for implementing RAID using fdisk command.<\/p>\n
e.g. #fdisk \/dev\/hda<\/p>\n
Press n to create the 3 new partitions each of 100Mb in size.<\/p>\n
Press p to see the partition table.<\/p>\n
Press t to change the partition id of all the three partitions created by you to fd<\/p>\n
(linux raid auto).<\/p>\n
Press wq to save and exit from fdisk utility in linux.<\/p>\n
#partprobe<\/p>\n
Use fdisk -l to list the partition table.<\/p>\n
Creating RAID<\/p>\n
# mdadm –create \/dev\/md0 –level=5 –raid-devices=3 \/dev\/hda6 \/dev\/hda7 \/dev\/<\/p>\n
hda8<\/p>\n
Press y to create the arrays.<\/p>\n
To see the details of raid use the following command: –<\/p>\n
# cat \/proc\/mdstat<\/p>\n
# mdadm –detail \/dev\/md0<\/p>\n
Creating the file system for your RAID devices<\/p>\n
#mkfs.ext3 \/dev\/md0<\/p>\n
Mounting the RAID partition<\/p>\n
#mkdir data<\/p>\n
# mount \/dev\/md0 data<\/p>\n
#df -h \/root\/data (Command is used to see the space allocation).<\/p>\n
Crashing the raid devices<\/p>\n
# mdadm –manage \/dev\/md0 –fail \/dev\/hda8<\/p>\n
Removing raid devices<\/p>\n
# mdadm –manage \/dev\/md0 –remove \/dev\/hda8<\/p>\n
Adding raid devices<\/p>\n
# mdadm –manage \/dev\/md0 –add \/dev\/hda8<\/p>\n
View failed and working raid devices<\/p>\n
# cat \/proc\/mdstat<\/p>\n
# mdadm –detail \/dev\/md0<\/p>\n
# tail \/var\/log\/messages<\/p>\n
To remove the RAID follow these steps: –<\/p>\n
1) unmount the mounted directory where raid is mounted.<\/p>\n
e.g. umount data<\/p>\n
2) Stop the device<\/p>\n
e.g. mdadm –stop \/dev\/md0<\/p>\n
3) View the details of your raid level using following command: –<\/p>\n
#cat \/proc\/mdstat<\/p>\n
#mdadm –detail \/dev\/md0<\/p>\n","protected":false},"excerpt":{"rendered":"
RAID (Redundant Array of Inexpensive Disks)<\/p>\n
Create 3 partitions for implementing RAID using fdisk command.<\/p>\n
e.g. #fdisk \/dev\/hda<\/p>\n
Press n to create the 3 new partitions each of 100Mb in size.<\/p>\n
Press p to see the partition table.<\/p>\n
Press t to change the partition id of all the three partitions created by you to fd<\/p>\n
[…]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[],"_links":{"self":[{"href":"https:\/\/mohan.sg\/index.php?rest_route=\/wp\/v2\/posts\/7071"}],"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=7071"}],"version-history":[{"count":1,"href":"https:\/\/mohan.sg\/index.php?rest_route=\/wp\/v2\/posts\/7071\/revisions"}],"predecessor-version":[{"id":7072,"href":"https:\/\/mohan.sg\/index.php?rest_route=\/wp\/v2\/posts\/7071\/revisions\/7072"}],"wp:attachment":[{"href":"https:\/\/mohan.sg\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=7071"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mohan.sg\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7071"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mohan.sg\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7071"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}