[Veritas-bu] Maximum mounts for an LTO-1 tape

Mark Eisenhardt mark_eisenhardt at stoneybrookfl.com
Thu Mar 24 17:16:37 CST 2005

I set mine to 120 for business critical data (production) and then move
the tapes to development pools which are set to 360 mounts. 
Personally these numbers are still probably a little low but depending
on your rotation schedules and also if the backup speed to the tape
drives is not shoe shining which will be a factor on media integrity as
well as the drive life you should be fine.

Another thing is to monitor which tapes have read/write failures and
which drives they occur in.
This allows me to either remove a problem tape or have a drive replaced.
Mark Eisenhardt

-----Original Message-----
From: veritas-bu-admin at mailman.eng.auburn.edu
[mailto:veritas-bu-admin at mailman.eng.auburn.edu] On Behalf Of Anthony
Sent: Thursday, March 24, 2005 5:28 PM
To: Veritas User List veritas-bu
Subject: [Veritas-bu] Maximum mounts for an LTO-1 tape

I've had a manager tell me that we should be discarding our LTO-1 media
after 10 or so mounts.  He mentioned that anything over 20 is asking for
trouble.  He said he bases this on prior experience.  I've done some
searching for what could be described as a 'best practice' regarding the
expiring LTO media and haven't come up with anything definitive.  I'm
courious what others are doing. 
As for me, I've got tapes with anywhere from a dozen mounts to over a
I don't get write errors when I do backups. I don't get read errors when
I duplicate images or perform restores.  10 to 20 mounts seems a bit
low.  I'd be interested in hearing what limits others set before
discarding an LTO tape.  Thanks.

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