It\u2019s possible to reduce the size of a logical volume without any data loss occurring.<\/p>\n
The first step is to check the existing size of the logical volume:<\/p>\n
[root@slave ~]# lvdisplay \/dev\/myvg\/mylv
\n — Logical volume —
\n LV Path \/dev\/myvg\/mylv
\n LV Name mylv
\n VG Name myvg
\n LV UUID K31i4c-mJmI-mNhJ-CvkB-c38D-7wCd-I2erTM
\n LV Write Access read\/write
\n LV Creation host, time slave, 2014-10-13 20:01:22 -0400
\n LV Status available
\n # open 1
\n LV Size 4.00 GiB
\n Current LE 1024
\n Segments 2
\n Allocation inherit
\n Read ahead sectors auto
\n – currently set to 8192
\n Block device 253:2
\nThe current size is 4 GB, although we would like to change the size to 2 GB.<\/p>\n
As a cautious measure, run fsck on the logical volume to ensure that the file system is in a consistent state.<\/p>\n
[root@slave ~]# fsck \/dev\/myvg\/mylv
\nWe will now resize the file system to 2 GB.<\/p>\n
[root@slave ~]# resize2fs \/dev\/myvg\/mylv 2G
\nThe final step is to reduce the logical volume using lvreduce.<\/p>\n
[root@slave ~]# lvreduce \/dev\/myvg\/mylv -L 2G
\n WARNING: Reducing active and open logical volume to 2.00 GiB
\n THIS MAY DESTROY YOUR DATA (filesystem etc.)
\nDo you really want to reduce mylv? [y\/n]: y
\n Reducing logical volume mylv to 2.00 GiB
\n Logical volume mylv successfully resized
\nVerify the new logical volume size using lvdisplay.<\/p>\n
[root@slave ~]# lvdisplay \/dev\/myvg\/mylv
\n — Logical volume —
\n LV Path \/dev\/myvg\/mylv
\n LV Name mylv
\n VG Name myvg
\n LV UUID K31i4c-mJmI-mNhJ-CvkB-c38D-7wCd-I2erTM
\n LV Write Access read\/write
\n LV Creation host, time slave, 2014-10-13 20:01:22 -0400
\n LV Status available
\n # open 1
\n LV Size 2.00 GiB
\n Current LE 512
\n Segments 1
\n Allocation inherit
\n Read ahead sectors auto
\n – currently set to 8192
\n Block device 253:2<\/p>\n","protected":false},"excerpt":{"rendered":"
It\u2019s possible to reduce the size of a logical volume without any data loss occurring.<\/p>\n
The first step is to check the existing size of the logical volume:<\/p>\n
[root@slave ~]# lvdisplay \/dev\/myvg\/mylv — Logical volume — LV Path \/dev\/myvg\/mylv LV Name mylv VG Name myvg LV UUID K31i4c-mJmI-mNhJ-CvkB-c38D-7wCd-I2erTM LV Write Access read\/write LV Creation host, […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[73],"tags":[],"_links":{"self":[{"href":"https:\/\/mohan.sg\/index.php?rest_route=\/wp\/v2\/posts\/6115"}],"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=6115"}],"version-history":[{"count":1,"href":"https:\/\/mohan.sg\/index.php?rest_route=\/wp\/v2\/posts\/6115\/revisions"}],"predecessor-version":[{"id":6116,"href":"https:\/\/mohan.sg\/index.php?rest_route=\/wp\/v2\/posts\/6115\/revisions\/6116"}],"wp:attachment":[{"href":"https:\/\/mohan.sg\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=6115"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mohan.sg\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=6115"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mohan.sg\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=6115"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}