LVM - Reduce
Brett Lee
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Problem Description

I have online JFS (journaled file system) and I want to reduce
/users from 2 gigabytes to 1 gigabyte. Do you have procedures
for doing this?

Configuration Info

Operating System -HP-UX
    Version -10.10
Hardware System -K210

Solution

The procedures for reducing a file system with online JFS Vxfs
are as follows:

1. To perform directory and extent re-organization, and view
   de-fragmentation reports:

          fsadm -d -D -e -E /<jfs_mount_point>

2. To resize the JFS file system:

          fsadm -b <newsize> /<jfs_mount_point>

Note: newsize is in sectors, 1 sector = 1 kb

3. Reduce the size of the logical volume:

          lvreduce -L 1000 /dev/vg##/lvol##

Note: size is in megabytes

4. fsadm -d -D -e -E /users

5. fsadm -b 1,024,000 /users

6. lvreduce -L 1000 /dev/vg##/lvol##