When searching for this info as well, I couldn't find any definitive answer 
either.
I just last week tossed out my original catalog tape that had over 1000 mounts.
There are several other tapes that are over a couple hundred. So, pretty much 
the answer is 'whatever you feel most comfortable with'. Physically, they can 
handle probably more mounts than most environments will be able to give them.

Rusty

> -----Original Message-----
> From: veritas-bu-admin AT mailman.eng.auburn DOT edu
> [mailto:veritas-bu-admin AT mailman.eng.auburn DOT edu]On Behalf Of Cornely,
> David
> Sent: Thursday, March 24, 2005 5:29 PM
> To: veritas-bu AT mailman.eng.auburn DOT edu
> Subject: RE: [Veritas-bu] Maximum mounts for an LTO-1 tape
> 
> 
> I agree, those numbers don't make any sense.  A quick google 
> search turned
> up this doc:
> http://www.fujifilm.com/JSP/fuji/epartners/tds/pdf/LTO_Ultrium
> _Drive_Data_QA
> .pdf
> which quotes 25,000 mounts without problems.
> 
> -----Original Message-----
> From: veritas-bu-admin AT mailman.eng.auburn DOT edu
> [mailto:veritas-bu-admin AT mailman.eng.auburn DOT edu] On Behalf Of 
> Wayne T Smith
> Sent: Thursday, March 24, 2005 3:15 PM
> To: veritas-bu AT mailman.eng.auburn DOT edu
> Subject: Re: [Veritas-bu] Maximum mounts for an LTO-1 tape
> 
> Bull.  The drives will wear out before the tapes will. 
> 
> The tapes are equally good at 10, 100, or 1000 mounts in my 
> brief 4 year 
> experience with LTO1.  We have a few hundred tapes mounted on 4 or 5 
> drives 24x7.
> 
> cheers, wayne
> 
> Anthony Guzzi wrote, in part,  on 3/24/2005 5:27 PM:
> 
> >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
> hundred. 
> >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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