Veritas™ File System 5.0.1 Administrator's Guide

4
Examine the content of the original file and the Storage Checkpoint file:
# cat /mnt0/file
hello, world
# cat /mnt0@5_30pm/file
hello, world
5
Change the content of the original file:
# echo "goodbye" > /mnt0/file
6
Examine the content of the original file and the Storage Checkpoint file. The
original file contains the latest data while the Storage Checkpoint file still
contains the data at the time of the Storage Checkpoint creation:
# cat /mnt0/file
goodbye
# cat /mnt0@5_30pm/file
hello, world
7
Unmount the Storage Checkpoint, convert the Storage Checkpoint to a nodata
Storage Checkpoint, and mount the Storage Checkpoint again:
# umount /mnt0@5_30pm
# fsckptadm -s set nodata ckpt@5_30pm /mnt0
# mount -F vxfs -o ckpt=ckpt@5_30pm \
/dev/vx/dsk/dg1/test0:ckpt@5_30pm /mnt0@5_30pm
8
Examine the content of both files. The original file must contain the latest
data:
# cat /mnt0/file
goodbye
You can traverse and read the directories of the nodata Storage Checkpoint;
however, the files contain no data, only markers to indicate which block of
the file has been changed since the Storage Checkpoint was created:
# ls -l /mnt0@5_30pm/file
-rw-r--r-- 1 root other 13 Jul 13 17:13 \
# cat /mnt0@5_30pm/file
cat: read error: No such file or directory
Storage Checkpoints
Storage Checkpoint administration
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