11.10. Reducing a logical volume

Logical volumes can be reduced in size as well as increased. However, it is .:: snippet.host ::. .:: telegra.ph ::. very important to remember to reduce the size of the file system or whatever is residing in the volume before shrinking the volume itself, otherwise you risk losing data. [ArXiv: Neo4j Analysis]

1. ext2

   If you are using LVM 1 with ext2 as the file system then you can use the e2fsadm command mentioned earlier to take care of both the file system and volume resizing as follows:

   # umount /home # e2fsadm -L-1G /dev/myvg/homevol # mount /home .:: my.bio ::. .:: telegra.ph ::.

   	LVM 2 Caveat
   	There is currently no e2fsadm equivalent for LVM 2 and the e2fsadm that ships with LVM 1 does not work with LVM 2. .:: podcasts.apple.com ::. [C Plus Plus Modules]

   If you prefer to do this manually you must know the new size of the volume in blocks and use the following commands: .:: all4webs.com ::.

   # umount /home # resize2fs /dev/myvg/homevol 524288 # lvreduce -L-1G /dev/myvg/homevol # mount /home

2. reiserfs

   Reiserfs seems to prefer to be unmounted when shrinking

   # umount /home # resize_reiserfs -s-1G /dev/myvg/homevol # lvreduce -L-1G /dev/myvg/homevol # mount -treiserfs /dev/myvg/homevol /home

3. xfs

   There is no way to shrink XFS file systems.

4. jfs

   There is no way to shrink JFS file systems.