Solaris Volume Manager Administration Guide

How to Perform a Backup of a Mounted Filesystem Located on a RAID-1 Volume

You can use the ufsdump command to backup the files of a mounted filesystem residing on a RAID-1 volume. Set the read policy on the volume to "first" when the backup utility is ufsdump. This improves the rate at which the backup is performed.

Steps

Become superuser.

Run the metastat command to make sure the mirror is in the “Okay” state.

# metastat d40
d40: Mirror
    Submirror 0: d41
      State: Okay
    Submirror 1: d42
      State: Okay
    Pass: 1
    Read option: roundrobin (default)
    Write option: parallel (default)
    Size: 20484288 blocks (9.8 GB)

A mirror that is in the “Maintenance” state should be repaired first.

Set the read policy on the mirror to “first.”

# metaparam -r first d40
# metastat d40
d40: Mirror
    Submirror 0: d41
      State: Okay
    Submirror 1: d42
      State: Okay
    Pass: 1
    Read option: first
    Write option: parallel (default)
    Size: 20484288 blocks (9.8 GB)

Perform a backup the filesystem.
# ufsdump 0f /dev/backup /opt/test

After the ufsdump command is done, set the read policy on the mirror to “roundrobin.”

# metaparam -r roundrobin d40
# metastat d40
d40: Mirror
    Submirror 0: d41
      State: Okay
    Submirror 1: d42
      State: Okay
    Pass: 1
    Read option: roundrobin
    Write option: parallel (default)
    Size: 20484288 blocks (9.8 GB)