Veritas Storage Foundation 5.1 SP1 Advanced Features Administrator"s Guide (5900-1503, April 2011)

Backup examples

In the following examples, the vxdump utility is used to ascertain whether

/dev/vx/dsk/fsvol/vol1 is a snapshot mounted as /backup/home and does the

appropriate work to get the snapshot data through the mount point.

These are typical examples of making a backup of a 300,000 block file system

named /home using a snapshot file system on /dev/vx/dsk/fsvol/vol1 with a

snapshot mount point of /backup/home.

To create a backup using a snapshop file system

To back up files changed within the last week using cpio:

# mount -F vxfs -o snapof=/home,snapsize=100000 \

/dev/vx/dsk/fsvol/vol1 /backup/home

# cd /backup

# find home -ctime -7 -depth -print | cpio -oc > /dev/rmt/0m

# umount /backup/home

To do a level 3 backup of /dev/vx/dsk/fsvol/vol1 and collect those files

that have changed in the current directory:

# vxdump 3f - /dev/vx/dsk/fsvol/vol1 | vxrestore -xf -

To do a full backup of /home, which exists on disk /dev/vx/dsk/fsvol/vol1,

and use dd to control blocking of output onto tape device using vxdump:

# mount -F vxfs -o snapof=/home,snapsize=100000 \

/dev/vx/dsk/fsvol/vol1 /backup/home

# vxdump f - /dev/vx/dsk/fsvol/vol1 | dd bs=128k > \

/dev/rmt/0m

265Administering snapshot file systems

Backup examples