Linda,
I can't say (and I dont' dare to do so) that there is a definite problem with
using 3570 tapes in "scratch mode". But as I mentioned below: that was one of
our actions and it improved the situation (combined with all the other steps).
We always found our tapes dead during reclamation (where tape go from used to
scratch and vice versa).
Defining all tapes as volumes (which go to empty instead of scratch) has an
additional advantage: ADSM can keep track of all mounts, errors etc. which are
lost if the tape goes scratch - so "q vol f=d" always ha the complete history of
the tape.
So it's not a general recommendation but in our case it seemed to improve the
situation.
BTW: if you go through the current thread and the archives you have a lot of
statements like "struggling with 3570 tapes, CE is replacing parts, CE is
updating the firmware etc." - it seems like this is a very common problem in the
3570 arena.
Mit freundlichem Gruss/Best Regards
Michael Abel
IBM Certified Advanced Technical Expert - RS/6000 AIX (4.3)
IBM Certified Specialist - ADSM, RS/6000 SP, Domino for RS/6000
Certified Lotus Professional (CLP) - System Administration
========================================================
res nova Unternehmensberatung GmbH
...aktiv in AIX
MAIL: Ruppmannstrasse 41
D-70565 Stuttgart, Germany
FON: +49 711 78888 0
FAX: +49 711 78888 99
WWW: http://www.resnova.de
EMAIL: mailto:Michael.Abel AT resnova DOT de
QUOTE: "(es klopft an die Tür) Ich bin der Ernst. Der Ernst des Lebens"
[Radiowerbung Kreissparkasse]
"McNamara, Linda" <LMCNAMA AT CITGO DOT COM> on 13.07.99 15:04:00
Please respond to "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>
To: ADSM-L AT VM.MARIST DOT EDU
cc: (bcc: Michael Abel/resnova)
Subject: Re: I/O - Errors on IBM Magstar 3575
I are also experience problem with our Magstar 3575 tapes C- format. I have
update the firmware to the latest and the IBM CE is slowly replacing parts.
Michael, why do you add the volumes to the storage pool and not use scratch
tapes? Is the a problem with the way ADSM handles the magstar tapes when
used as scratch?
FYI - Server is ADSM for AIX ver 3.1.1.5 running on AIX 4.2.1.
Linda
> ----------
> From: Michael Abel[SMTP:Michael.Abel AT RESNOVA DOT DE]
> Reply To: ADSM: Dist Stor Manager
> Sent: Tuesday, July 13, 1999 2:12 AM
> To: ADSM-L AT VM.MARIST DOT EDU
> Subject: Re: I/O - Errors on IBM Magstar 3575
>
> <<File: ATT18826.txt>>
>
> We had a lot of problems with our B-Drives and B-Tapes...
>
> To make a long story short: we worked on several problem areas in parallel
> and
> right now (knock on wood) we do not have any problems with our tapes. This
> is
> what we did:
>
> - have an IBM CE replace part after part of the robotics, drive heads,
> drive
> electronics etc.
> - have IBM "media service" replace approximately 20% of our tapes
> - change the SCSI card (right here it was an Adaptec in a IBM PC NT box)
> - update the SCSI driver
> - update ADSM Server
> - monitor tapes carefully (we randomly do "audit vol" on all of our tapes)
> - we also added all volumes to the storage pool and don't use scratch
> tapes any
> longer
>
> Mit freundlichem Gruss/Best Regards
>
> Michael Abel
> IBM Certified Advanced Technical Expert - RS/6000 AIX (4.3)
> IBM Certified Specialist - ADSM, RS/6000 SP, Domino for RS/6000
> Certified Lotus Professional (CLP) - System Administration
> ========================================================
> res nova Unternehmensberatung GmbH
> ...aktiv in AIX
> MAIL: Ruppmannstrasse 41
> D-70565 Stuttgart, Germany
> FON: +49 711 78888 0
> FAX: +49 711 78888 99
> WWW: http://www.resnova.de
> EMAIL: mailto:Michael.Abel AT resnova DOT de
> QUOTE: "(es klopft an die Tür) Ich bin der Ernst. Der Ernst des Lebens"
> [Radiowerbung Kreissparkasse]
>
>
>
>
>
>
>
>
> Sabine Rettenberger <Sabine.Rettenberger AT WOLF-HEIZTECHNIK DOT DE> on
> 13.07.99
> 09:56:28
>
> Please respond to "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>
>
>
>
>
>
>
>
>
>
>
>
> To: ADSM-L AT VM.MARIST DOT EDU
>
> cc: (bcc: Michael Abel/resnova)
>
>
>
> Subject: I/O - Errors on IBM Magstar 3575
>
>
>
>
>
>
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>
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