Veritas™ File System 5.0.1 Administrator's Guide

Removing a Storage Checkpoint

You can delete a Storage Checkpoint by specifying the remove keyword of the

fsckptadm command. Specifically, you can use either the synchronous or

asynchronous method of removing a Storage Checkpoint; the asynchronous

method is the default method. The synchronous method entirely removes the

Storage Checkpoint and returns all of the blocks to the file system before

completing the fsckptadm operation. The asynchronous method simply marks

the Storage Checkpoint for removal and causes fsckptadm to return immediately.

At a later time, an independent kernel thread completes the removal operation

and releases the space used by the Storage Checkpoint.

In this example, /mnt0 is a mounted VxFS file system with a Version 6 disk layout.

This example shows the asynchronous removal of the Storage Checkpoint named

thu_8pm and synchronous removal of the Storage Checkpoint named thu_7pm.

This example also lists all the Storage Checkpoints remaining on the /mnt0 file

system after the specified Storage Checkpoint is removed:

# fsckptadm remove thu_8pm /mnt0

# fsckptadm list /mnt0

/mnt0

thu_7pm:

ctime = Thu 3 Mar 2005 7:00:17 PM PST

mtime = Thu 3 Mar 2005 7:00:17 PM PST

flags = nodata, largefiles

# fsckptadm -s remove thu_7pm /mnt0

# fsckptadm list /mnt0

/mnt0

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:

■ 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.

Storage Checkpoints

Storage Checkpoint administration