Veritas File System 4.1 Administrator's Guide (HP-UX 11i v3, February 2007)

Storage Checkpoints
Storage Checkpoint Administration
Chapter 584
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 (default) 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
The /fsvol 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,rw \
/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:
To mount a Storage Checkpoint of a cluster file system, you must also use the -o cluster option:
# mount -F vxfs -o cluster,ckpt=may_23 \
Device Special File device
to fsck
mount
point
FS
type
fsck
pass
mount
at boot
mount
options
/dev/vx/dsk/fsol/vo
l1
/dev/vx/rdsk/fs
vol/vol1
/fsvol vxfs 1 yes -
/dev/vx/dsk/fsvol/
vol1:may_23
-/fsvol_
may_23
vxfs 0 yes ckpt=
may_23