We too have two 3570 tape subsystems (4 drives) on our R50. We have had
constant tape problems, the drives are always
cleaning themselves, we have exchanged many tapes, lost data, etc... We
have stayed on the (b)leading edge of
Atape driver and 3570 microcode (we are currently running microcode which
was e-mailed directly from the developer.
We are currently looking for a new tape solution.
(Embedded
image moved Garin_Walsh @ NOTES.SABRE.COM
to file: 08/04/98 10:06 AM
PIC21192.PCX)
Please respond to ADSM-L AT VM.MARIST DOT EDU
To: ADSM-L @ VM.MARIST.EDU
cc: (bcc: Rory D. Nichols/Corp/Hormel)
Subject: Re: IBM RS6000 F50 4-way
We have a 4-way F50 w/ a 3575 L12 (2 3570 B type drives) and have been very
happy so far - running AIX 4.2.1 with the latest TCP/IP and tty patches,
ADSM 3.1.1.3, 332 MHz processors, 512 MB RAM, and 4 of the new 9.1 GB SCSI
drives. 100+ clients (mix of NT, 95, VMS, and AIX). Very fast. The only
problems encountered so far are that the system firmware code installed on
the F50 when the machine shipped was not a new enough version to support
the 332 processors - We had intermittent (every 2 weeks or so) crashes with
a SRN that indicated an I/O planar failure. The tech that replaced the
planar installed one with even an older firmware level - IBM was surprised
it even booted - it didn't run long though. After the firmware update not
another crash - now it has been almost 19 days of uptime and counting.
One annoying thing so far about the tape drives though is that one of the
two seems to want to be continuously cleaned. I was told that there was a
firmware update for the drives to address a possible cause of this problem
but I can't find anyone who knows about it - Anyone out there have a
similar problem and a solution???
Also, from newbie experience, I would want a minimum of three drives in the
future. It seems that whenever there is a long running process that is
using two of the drives, ADSM wants to do a database backup and that has
precedence - I am currently evaluating point in time recovery and have the
database backup trigger enabled - aborting the long running process.
Karl Roessmann <roess AT AND.MPI-STUTTGART.MPG DOT DE> on 08/04/98 02:28:20 AM
Please respond to "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>
To: ADSM-L AT VM.MARIST DOT EDU
cc:
Subject: IBM RS6000 F50 4-way
we are planning to move our ADSM server to an
IBM RS6000 F50 4-way.
Anybody have good or bad experiences with ADSM
on this hardware ?
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Karl Roessmann Tel. +49-711-689-1657
Karl Roessmann Tel. +49-711-689-1657
Max-Planck-Institute Stuttgart Fax. +49-711-689-1632
Heisenbergstr. 1
70506 Stuttgart email
roess AT dvfkf.mpi-stuttgart.mpg DOT de
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