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Backup examples

The vxdump utility ascertains whether /dev/rdsk/fsvol/vol1 is a snapshot mounted as /backup/home and does the appropriate work to get the snapshot data through the mount point.

The following are typical examples of making a backup of a 300,000 block file system named /home using a snapshot file system on a Volume Manager volume 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 -V vxfs -o snapof=/home,snapsize=100000 \
/dev/vx/dsk/fsvol/vol1 /backup/home

# cd /backup

# find home -ctime -7 -depth -print | cpio -oc > /dev/rfd0

# umount /backup/home

• To do a level 3 backup of /dev/vx/rdsk/fsvol/vol1 and collect those files that have changed in the current directory:

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

• To do a full backup of /home, which exists on disk /dev/vx/rdsk/fsvol/vol1, and use dd to control blocking of output onto tape device using vxdump:

# mount -V vxfs -o snapof=/home,snapsize=100000 \
/dev/vx/dsk/fsvol/vol1 /backup/home

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

/dev/rfd0