You can mount Storage Checkpoints using the mount command with the mount option -o ckpt=ckpt_name.
See the mount_vxfs
(1M) manual page.
Observe the following rules when mounting Storage Checkpoints:
Storage Checkpoints are mounted as read-only Storage Checkpoints by default. If you must write to a Storage Checkpoint, mount it using the -o rw option.
If a Storage Checkpoint is currently mounted as a read-only Storage Checkpoint, you can remount it as a writable Storage Checkpoint using the -o remount option.
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.
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 -V vxfs -o ckpt=may_23 /dev/vx/dsk/fsvol/vol1:may_23 \ /fsvol_may_23
To remount the Storage Checkpoint named may_23
as a writable Storage Checkpoint, type:
# mount -V 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/filesystems
file:
To mount a Storage Checkpoint of a cluster file system, you must also use the -o cluster option:
# mount -V vxfs -o cluster,ckpt=may_23 \ /dev/vx/dsk/fsvol/vol1:may_23 /fsvol_may_23
You can only mount a Storage Checkpoint cluster-wide if the file system that the Storage Checkpoint belongs to is also mounted cluster-wide. Similarly, you can only mount a Storage Checkpoint locally if the file system that the Storage Checkpoint belongs to is mounted locally.
You can unmount Storage Checkpoints using the umount command.
See the umount_vxfs
(1M) manual page.
Storage Checkpoints can be unmounted by the mount point or pseudo device name:
# umount /fsvol_may_23 # umount /dev/vx/dsk/fsvol/vol1:may_23