How to Expand a File System

Before You Begin

Check Prerequisites for Creating Solaris Volume Manager Components.

1. Review the disk space associated with a file system.

   # df -hk

   See the df(1M) man page for more information.

2. Expand a UFS file system on a logical volume.

   # growfs -M /mount-point /dev/md/rdsk/volume-name

   -M /mount-point

   Specifies the mount point for the file system to be expanded.

   /dev/md/rdsk/volume-name

   Specifies the name of the volume on which you want to expand.

   See the following example and the growfs(1M) man page for more information.

Example 20–4 Expanding a File System

In the following example, a new slice is added to a volume, d10, which contains the mounted file system, /home2. The growfs command specifies the mount point with the -M option to be /home2, which is expanded onto the raw volume /dev/md/rdsk/d10. The file system will span the entire volume when the growfs command is complete. You can use the df -hk command before and after expanding the file system to verify the total disk capacity.

# df -hk
Filesystem            kbytes    used   avail capacity  Mounted on
...
/dev/md/dsk/d10        69047   65426       0   100%    /home2
...
# growfs -M /home2 /dev/md/rdsk/d10
/dev/md/rdsk/d10:       295200 sectors in 240 cylinders of 15 tracks, 82 sectors
        144.1MB in 15 cyl groups (16 c/g, 9.61MB/g, 4608 i/g)
super-block backups (for fsck -F ufs -o b=#) at:
 32, 19808, 39584, 59360, 79136, 98912, 118688, 138464, 158240, 178016, 197792,
 217568, 237344, 257120, 276896,
# df -hk
Filesystem            kbytes    used   avail capacity  Mounted on
...
/dev/md/dsk/d10       138703   65426   59407    53%    /home2
...

For mirror volumes, always run the growfs command on the top-level volume. Do not run the command on a submirror or master device, even though space is added to the submirror or master device.