Lists all filesystems in the /etc/filesystems entry:

# lsfs

List all filesystems with detailed info:

# lsfs -q

To list all filesystems (default):

# lsfs -a

Specify the output in list format:

# lsfs -l

Specify the output in column format:

# lsfs -c

Lists all jfs2 filesystems:

# lsfs -v jfs2

Change size of FS /blah to 49152 x 512 bytes blocks (24 MB):

# chfs -a size=49152 /blah

Add 49152 x 512 byte blocks to FS /blah:

# chfs -a size=+49152 /blah

Change the mount point from /blah to /blah-bkp:

# chfs -m /blah /blah-bkp

To auto mount the filesystem blah:

# chfs -A /blah

Remove account attribute of /blah. ( from /etc/filesystems):

# chfs -d account /blah

This will mount the 2nd copy of mirrored filesystem /www to /backup in read-only mode:

# chfs -a splitcopy=/backup -a copy=2 /www

Creates FS /blah of type jfs2 in VG testvg of blocksize 128930:

# crfs -v jfs2 -g leetvg -a size=128930 -m /blah

Create FS /blah of type jfs on device /dev/lv_blah:

# crfs -v jfs2 -d /dev/lv_blah -m /blah

Enable Cio on a filesystem:

# chfs -a options=rw,cio /blah

Deletes FS /blah and associated LV:

# rmfs /blah

Deletes FS /blah its mount point and associated LV:

# rmfs -r /blah

To defragment the file system /blah:

# defragfs /blah

Display the current defrag status of the file system:

# defragfs -q /blah

To fsck the filesystem associated to /dev/lv00 assuming response "yes":

# fsck -y n /dev/lv007

To restore superblock from backup superblock:

# fsck -p /dev/lv007