Mauro

>
> H.G.,
>
> still having problems on two out of the four tapes.
>
> IBM changed on one of the two faulty drive:
>
>         - head      (nothing's changed)
>         - card-pack (nothing's changed)
>
> I changed:
>
>         - 3590 microcode from D0IC_994 to D0IC_A70 (nothing's changed)
>         - Atape driver downgraded 5.0.2 -> 4.6.2   (nothing's changed)
>
> IBM guys are scratching their heads, they run short on ideas ... I'm busy
> copying the R/O cartridges and trying to restore what it's set as
> damaged. I wish I could go back to the old and secure 3590-1BA drives.
>
> I have two drive on each board (Wide/Fast-20 SCSI I/O Controller). Can
> this be a problem given the current throughput of the new drives?
>
> How many 3590-1EA do you have on a single SCSI channel and which SCSI
> board do you have on the AIX box?

We have wide differential SCSI adapters (type 4-C and 4-6). We have 4 drives
on each SCSI-bus which is ian interim solution until the installation of
new server hardware. Our servers are RS/6000 590 models.

IBM analyzed our errorlogs and came to the result that the errors were caused
by three volumes which are not readable any longer. They stated that there
may be problems reading tapes with 3590E drives which were written with the
old drives before upgrade!

Gunther
._________________________________________________________________________.
|H.G.Borrmann                           |Tel.: (0761) 203-4652            |
|Rechenzentrum der Universitaet Freiburg|Fax:  (0761) 203-4643            |
|Hermann-Herder-Str. 10                 |email:                           |
|D79104 FREIBURG                        |borrmann AT ruf.uni-freiburg DOT de    
 |
|_________________________________________________________________________|



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