Veritas™ File System 5.0.1 Administrator's Guide

■ To mount a Storage Checkpoint of a file system, first mount the file system
itself.
■ To unmount a file system, first unmount all of its Storage Checkpoints.
Warning: If you create a Storage Checkpoint for backup purposes, do not mount
it as a writable Storage Checkpoint. You will lose the point-in-time image if
you accidently write to the Storage Checkpoint.
A Storage Checkpoint is mounted on a special pseudo device. This pseudo device
does not exist in the system name space; the device is internally created by the
system and used while the Storage Checkpoint is mounted. The pseudo device is
removed after you unmount the Storage Checkpoint. A pseudo device name is
formed by appending the Storage Checkpoint name to the file system device name
using the colon character (:) as the separator.
For example, if a Storage Checkpoint named may_23 belongs to the file system
residing on the special device /dev/vx/dsk/fsvol/vol1, the Storage Checkpoint
pseudo device name is:
/dev/vx/dsk/fsvol/vol1:may_23
■ To mount the Storage Checkpoint named may_23 as a read-only Storage
Checkpoint on directory /fsvol_may_23, type:
# mount -F vxfs -o ckpt=may_23 /dev/vx/dsk/fsvol/vol1:may_23 \
/fsvol_may_23
Note: The vol1 file system must already be mounted before the Storage
Checkpoint can be mounted.
■ To remount the Storage Checkpoint named may_23 as a writable Storage
Checkpoint, type:
# mount -F vxfs -o ckpt=may_23,remount \
/dev/vx/dsk/fsvol/vol1:may_23 /fsvol_may_23
■ To mount this Storage Checkpoint automatically when the system starts up,
put the following entries in the /etc/fstab file:
Device-Special-File Mount-Point fstype options backup- pass-
frequency number
/dev/vx/dsk/fsvol/ /fsvol vxfs defaults 0 0
93Storage Checkpoints
Storage Checkpoint administration