Growing an EFS Filesystem Onto Another Disk

Caution: All files on the new disk are destroyed by this procedure.

1. Make a backup of the filesystem you are going to extend.

2. Place an entry in the file /etc/lvtab for the logical volume. The entry should look something like this:

   lv0:Project Volume:devs=/dev/dsk/dks0d2s7,/dev/dsk/dks0d3s7

   An /etc/lvtab entry is made up of several colon-separated fields. In the above example:

   lv0

   The device name of the logical volume. It must be lv followed by a single digit.

   Project Volume

   The volume label. This field is optional, but may be useful for commands to verify the volume associated with the device.

   devs=/dev/dsk/dks0d2s7,/dev/dsk/dks0d3s7

   
   The disk partitions that make up the logical volume. The first partition must be the existing partition.

   This example shows a logical volume composed of two disk partitions, but it could be made up of several partitions. The only limit is the maximum size of a filesystem, 8 GB. For more information on /etc/lvtab entries, see the section "Creating Entries in the /etc/lvtab File" in Chapter 8. When using a logical volume to extend an existing filesystem, the logical volume cannot be striped.

3. Change the entry for /work in the file /etc/fstab to read:

   /dev/dsk/lv0 /work efs rw,raw=/dev/rdsk/lv0 0 0

4. Unmount the /work filesystem:

   # umount /work

5. Run the mklv command with the device name of the logical volume as an argument to create the logical volume:

   # mklv -f lv0

6. Run lvck to check the new logical volume:

   # lvck /dev/rdsk/lv0

7. Grow the filesystem into the logical volume with the growfs command:

   # growfs /dev/rdsk/lv0

8. Run fsck on the expanded filesystem:

   # fsck /dev/rdsk/lv0

9. Mount the logical volume:

   # mount /work