WARNING: storage maintenance, especially reducing filesystems, can potentially result in errors or data loss. Plan and act accordingly. Always create backups and follow best practices.
For this example, we’ll be using the standard /dev/datavg/eclipse LV that’s mounted at /u2/eclipse. We’ll be shrinking the filesystem to 50GB.
Begin by unmounting the file system:
umount /u2/eclipse
Force a filesystem check:
e2fsck -f /dev/datavg/eclipse
Reduce the file system. The number specified here is the final, target size of the filesystem, not the amount by which it is reduced.
resize2fs /dev/datavg/eclipse 50G
The logical volume must also be reduced by the same amount:
lvreduce -L 50G /dev/datavg/eclipse
Mount the filesystem and run df to verify the change was made:
mount /u2/eclipse df -h /u2/eclipse
Resources:
- https://access.redhat.com/kb/docs/DOC-5531
- http://blog.shadypixel.com/how-to-shrink-an-lvm-volume-safely/