Need bottle of snapshot remover.

[Jonathan Corbeill]

I had created a few snapshots of my JFS filesystem. Several weeks later everthing is working perfectly and I want to remove the snapshots.

They don't show up anywhere in SAM, but are displayed when I do a bdf.

Please advise on how I can remove these, I can't find anything in the doc.

[Jonathan Corbeill]

maybe it doesn't show up when I do a pdf. But it does show in the filesystem. Can I just do a recursive delete on these babies?

[A. Clay Stephenson]

Hi Jonathan,

It couldn't be easier.

umount /mysnapshot1
umount /mysnapshot2

I'm amazed that you didn't fill up your snapshot buffers long before this.

Regards, Clay

[Patrick Wallek]

When you are talking about taking a snapshot of your filesystems, what exactly are you talking about? How did you create the "snapshot"?

Did you just make a copy of the directories, or did you use the actual snapshot functionality available with the jfs filesystems?

More information would be very helpful.

[Jonathan Corbeill]

I created the snapshot using SAM on the JFS filesystem.

[A. Clay Stephenson · Accepted solution]

Okay Jonathan,

Remember these are readonly you couldn't remove files from them if you wanted to.

If they are showing up in bdf, they definitely are still mounted.

1) umount /mysnapshot1
2) (optional) rmdir /mysnapshot1

Clay

[Patrick Wallek]

I wasn't aware that you could create a JFS snapshot filesystem via SAM.

If the filesystem is a true JFS snapshot filesystem, then you should definitely see it when you do a bdf. If the snapshot is there, then you can do a 'umount /snapshop_fs_name' and the snapshot will be unmounted and all appropriate action needed by JFS will be done.

If you do not see the snapshot file system via a bdf, then they probably do not exist anymore.

Has this machine been rebooted since you created the snapshots? If so, then they probably would have been unmounted as a part of the reboot and then would NOT have been recreated when the machine came back up because there were not entries in the /etc/fstab file for those file systems.

As a point of information -- JFS snapshot file systems are not meant to be a long term storage area. They are meant to be created so that you can do a backup of static data on a filesystem rather than changing data. After the backup has been done, the file systems are unmounted and the filesystems are back to normal.