We're running 4 DLT7000 drives in our 9710, running on an SP wide node (77
MHz). I have the robot and two drives on one SCSI board and two more drives
on the second. I don't see a significant difference in tape-to-tape copy
across SCSI boards or on the same board. These are the fast/wide
differential SCSI adapters rated at 20 (or is it 40?) MB/sec, and the
DLT7000 is only listed as 5 MB/sec. Even so, I don't plan on more than two
drives per adapter.

Tom Kauffman
Sr. Technical Advisor
NIBCO, Inc

kauffmant AT nibco DOT com

> ----------
> From:         Dan Giles[SMTP:Dan_Giles AT MANULIFE DOT COM]
> Sent:         Friday, May 08, 1998 10:35 AM
> To:   ADSM-L AT VM.MARIST DOT EDU
> Subject:      DLT/SCSI Configuration
>
> We have 3 DLT7000 drives in a Stk 9710 library connected to our adsm
> server
> (currently 2.1.12) running on an F30.
>
> The way we had it configured was that the 9710 and one DLT was on one SCSI
> adaptor, and the other 2 DLT's were on a second adaptor. We recently got a
> third
> adaptor so that each DLT now has its own SCSI adaptor. I thought I would
> see a
> big performance boost when it comes to tape-to-tape activity, but so far
> it
> doesn't appear that this is the case.
>
> Is there anyone out there running multiple high-speed tape drives on a
> single
> SCSI adaptor? Do you have any performance issues regarding this
> configuration?
> Being on an F30, I'm out of PCI slots and really need to get a fourth
> drive on.
> I would like to know from other's experience whether I should try to free
> a slot
> up somehow for another adapter, or just go ahead and double-up again.
>
> Thanks in advance.
>