(top post warning).
Of Denys two suggestions the 50-68 cable to an SE-SCSI HBA is more likely to provide a basic connection. The HVD/LVD converter would not work on k-Class as there are actually some driver restrictions in the NIO F/W SCSI HBA driver that prevent one from configuring a DDS as connected to a A28696A HBA bus (at least as far back as 6.5).
At the same time "connect ability" does not mean "advisability" and never "supportability".
o We didn't test the DAT40 on S900/NIO systems because its peak I/O bandwidth (6.0 MB/sec Asynchronous) was projected to exceed the capabilities of the SE-SCSI HBA (technically 5.0 Megabytes/sec but really closer to 4 MB/S). Historically it is not a good idea to run tapes at slower than rated speed as it causes the tape to drop from streaming mode into start/stop mode and excessive wear and/or bad performance result. Many tape drives do implement variable speed streaming but it wasn't clear that the DAT40 was one.
o We never certified any LVD-SCSI interface peripherals on the NIO-SE-SCSI HBA. Though all Wide LVD devices are technically supposed to be able to RUN (READ/WRITE/REWIND) narrow & SE-SCSI it is never advisable depend upon manufacturer actually testing all device functionality in such a hobbled mode. Additionally newer devices may spit out "SCSI Standard" information that very old drivers will choke on.
o No idea what the PDC would do if you tried to boot from a CSLT on this device. . .
This means that DAT40 is NOT supported by HP via SE-SCSI on S900 NIO systems (9x8,9x9,99x & earlier). Works fine and is supported by HP on A/N-Class.
So, I'd advise you only use this kind of set-up to write data you are willing to lose ;-)!, OR at least make sure your back-up application vendor is willing to support you. YMMV. . .
Jim Hawkins
MPE/iX I/O Architect
-----Original Message-----
From: HP-3000 Systems Discussion [mailto:[log in to unmask]] On Behalf Of Denys Beauchemin
Sent: Wednesday, September 26, 2007 12:32 PM
To: [log in to unmask]
Subject: Re: [HP3000-L] dat40
Hello Christian, long time.
I believe the DAT40 is an LVD device which would require you to connect it
via a 68 to 50 pin cable with high-bit termination or to a 68 bit SCSI port
on the 3000 using a converter to allow you to switch from HVD (HP3000) to
LVD or SE (DAT40).
Denys
-----Original Message-----
From: HP-3000 Systems Discussion [mailto:[log in to unmask]] On Behalf
Of Christian Scott
Sent: Wednesday, September 26, 2007 1:20 PM
To: [log in to unmask]
Subject: [HP3000-L] dat40
Importance: High
Hi,
I need to find out if I can connect a dat40 on a hpe3000 k-class server, if
so what are the step involve.
Thanks,
Christian Scott
VP - Development & CTO
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Tel: 514-273-0008 x118
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