Accessing a Storage Checkpoint

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:


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.

If older Storage Checkpoints already exist, write activity to a writable Storage Checkpoint can generate copy operations and increased space usage in the older 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:


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


You do not need to run the fsck utility on Storage Checkpoint pseudo devices because pseudo devices are part of the actual file system.