Thats true.

When we installed our first 3590's, we had to greatly increate the MIH
values. Something crazy like 25-minutes is the recommendation.

I would still check into the microcode level, though !





"Thomas Denier" <Thomas.Denier AT mail.tju DOT edu>
03/05/2003 02:19 PM


        To:     ADSM-L AT VM.MARIST DOT EDU, zforray AT VCU DOT EDU
        cc:
        Subject:        Re: Errors on 3590 K tapes


> Sounds a lot like what I was seeing when we got our "new to us" 3590E1A
> drives.
>
> The problem was the microcode level. It was way behind and caused all
> kinds of grief. 2/3 of our new tapes were unlabelable. The drive would
> load the tape and spin for ever until it timed out.
>
> Once the microcode/firmware was upgraded, problems went away. Went back
> and relabeled tapes that previously were unlabelable.

We have, as far as I can tell, solved our problem. We had to increase
the missing interrupt time for the 3590 drives. If an I/O operation is
pending for longer than the missing interrupt time, OS/390 will decide
that the operation failed.