Re: tape length issues

[Lambelet,Rene,VEVEY,GL-CSC]

Hi,

same for us, using about 1500 Ultrium, we got 3 completely lost tapes
(crumpled) and about 1 daily write error !

With Magstar, 1 error in last 4 years !

René LAMBELET
NESTEC  SA
GLOBE - Global Business Excellence
Central Support Center
Information Technology
Av. Nestlé 55  CH-1800 Vevey (Switzerland) 
tél +41 (0)21 924 35 43   fax +41 (0)21 703 30 17   local
UBS-Nestec, Bussigny
mailto:[EMAIL PROTECTED]

This message is intended only for the use of the addressee
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-Original Message-
From: Matt Simpson [mailto:[EMAIL PROTECTED]]
Sent: Tuesday,17. December 2002 15:12
To: [EMAIL PROTECTED]
Subject: Re: tape length issues


At 20:44 -0500 12/16/02, Richard Sims wrote:
>There's a surprising amount of inconsistency as to the length of Ultrium
tape,
>as reported by various vendors - despite the supposed industry standard.
>HP quotes 580 meters; others 609 or 610 meters (2000 feet).

Yesterday, we had the opportunity to find out how long an Imation
Ultrium tape is, thanks to one of the drives in our 3584 library

http://jms.cc.uky.edu/Fun/ltotape.jpg

After the CE removed the tape from the drive, he also had to replace the
drive.

I just love this new technology, instead of that boring old mainframe
stuff that just worked and didn't give us challenges like this.
--


Matt Simpson --  OS/390 Support
219 McVey Hall  -- (859) 257-2900 x300
University Of Kentucky, Lexington, KY 40506
<mailto:[EMAIL PROTECTED]>
mainframe --   An obsolete device still used by thousands of obsolete
companies serving billions of obsolete customers and making huge obsolete
profits for their obsolete shareholders.  And this year's run twice as fast
as last year's.

Re: tape length issues

[Matt Simpson]

At 20:44 -0500 12/16/02, Richard Sims wrote:

There's a surprising amount of inconsistency as to the length of Ultrium tape,
as reported by various vendors - despite the supposed industry standard.
HP quotes 580 meters; others 609 or 610 meters (2000 feet).


Yesterday, we had the opportunity to find out how long an Imation
Ultrium tape is, thanks to one of the drives in our 3584 library

http://jms.cc.uky.edu/Fun/ltotape.jpg

After the CE removed the tape from the drive, he also had to replace the drive.

I just love this new technology, instead of that boring old mainframe
stuff that just worked and didn't give us challenges like this.
--


Matt Simpson --  OS/390 Support
219 McVey Hall  -- (859) 257-2900 x300
University Of Kentucky, Lexington, KY 40506

mainframe --   An obsolete device still used by thousands of obsolete
companies serving billions of obsolete customers and making huge obsolete
profits for their obsolete shareholders.  And this year's run twice as fast
as last year's.

Re: tape length issues

[Richard Sims]

>A little while ago, there was a post regarding the physical length of =
>LTO media (which I can no longer find on the ADSM.org website).

There's a surprising amount of inconsistency as to the length of Ultrium tape,
as reported by various vendors - despite the supposed industry standard.
HP quotes 580 meters; others 609 or 610 meters (2000 feet).

Don't miss the outstanding Technology Primer on the LTO web site: www.lto.org .
Would that all vendors illustrated their technology as wonderfully.

  Richard Sims, BU

Re: tape length issues

[David Longo]

You would not loose data.  If volume B gets full then another
tape is mounted and data move continues.

I don't think there is any tape technology that two tapes would have
"identical" length other than a random pairing.  That's why TSM writes
till EOT then continues onto another tape.

David Longo

>>> [EMAIL PROTECTED] 12/16/02 05:07PM >>>
A little while ago, there was a post regarding the physical length of
LTO media (which I can no longer find on the ADSM.org website).  The
author mentioned that due to discrepancies in the physical length of
tape, in an LTO cartridge, possible issues could arise when copying data
from one volume to another.  For example, assuming you had two 100GB LTO
tapes, it would be possible to lose data when performing a "Move Data"
from volume A to volume B, if volume B happened to be slightly shorter.


My question is, has anyone ever experienced anything like this?  Is
this really an issue?

Thanks.
Peter

Peter Ford
System Engineer


Stentor, Inc.
 5000 Marina Blvd,
 Brisbane, CA 94005-1811
 Main Phone: 650-228-
 Fax: 650 228-5566
 http://www.stentor.com
 [EMAIL PROTECTED]


"MMS " made the following
 annotations on 12/16/2002 07:14:33 PM
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