ADSM-L

Re: Interesting LTO fault's symptom

2003-06-16 10:28:53
Subject: Re: Interesting LTO fault's symptom
From: "Tomáš Hrouda Ing." <throuda AT HTD DOT CZ>
To: ADSM-L AT VM.MARIST DOT EDU
Date: Mon, 16 Jun 2003 15:57:47 +0200
We have it on both IBM and Imation tapes (we had first 20 tapes in initial
order with library from IBM and 20 Imation tapes bought 1/2 year later).
Fault tapes are mixed.

Tomas

> -----Original Message-----
> From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU]On Behalf Of
> Lambelet,Rene,VEVEY,GL-CSC
> Sent: Monday, June 16, 2003 3:13 PM
> To: ADSM-L AT VM.MARIST DOT EDU
> Subject: Re: Interesting LTO fault's symptom
>
>
> Hi,
>
> we have exactly the same problem, about 2 -3 tapes / day with write error,
> 2/3 of capacity. Only on Imation tapes, not on IBM ones...
>
> We spend our time to do MOVE DATA !
>
>                 Reni LAMBELET
>                 NESTEC  SA
>                 GLOBE - Global Business Excellence
>                 Central Support Center
>                 Information Technology
>                 Av. Nestli 55  CH-1800 Vevey (Switzerland)
>                 til +41 (0)21 924 35 43   fax +41 (0)21 703 30 17   local
> K4-404
>                 mailto:rene.lambelet AT nestle DOT com
>
>
> -----Original Message-----
> From: Toma9 Hrouda Ing. [mailto:throuda AT HTD DOT CZ]
> Sent: Monday,16. June 2003 14:14
> To: ADSM-L AT VM.MARIST DOT EDU
> Subject: Interesting LTO fault's symptom
>
>
> Hi all,
>
> during last weeks I did interesting findings at one of production LTO
> 3583-L18 library. There are 2 drives and both was changed past series of
> media faults (one of them twice) past about 1 year of operation. We have
> about 20 "historicaly touched" tapes with average 3-4 write faults. Media
> faults are still repeated and my finding is all that faults were done at
> 70-75% of estimated capacity (set by longterm using to 105GB, we
> use client
> compression) during filling the tape. It seems like all tapes
> were corrupted
> nearly at the same place, of course there is some diffusion
> because this is
> only estimated filling. Faults at these tapes are repeatedly occured at
> these percents of max capacity.
>
> I understand when one tape has media fault repeatedly at the same
> place, but
> about 20 tapes? Could it mean that all tapes were corrupted by
> one bad drive
> at the same place, or can be reason at microcode?
>
> We are in contact with our IBM support to solve it, but I am interested if
> anybody of you register similar phenomenon?
>
> Tomas

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