SUMMARY: DLT tape is not seen on SRM console on Alpha Server 1000A

From: Tarasyuk Nik <NTarasyuk_at_snowyhydro.com.au>
Date: Wed, 17 Oct 2001 13:05:53 +1000

-----Original Message-----

I was going to do a backup of our spare 1000A and to use it for other
purposes.
To have it done faster I have pulled out internal DDS tape and connected
DLT drive to outside SCSI connector.
DLT drive is ON and has unique SCSI address, but still not seen on SRM
console.

I was told that it's an old problem, but nobody seems to know what the
problem is.

Can anyone give me any clues on this, please.
Doesn't DLT work with 1000A?
It works OK with our ES40, XP1000 and even with old AlphaStations 255.
------------------------------------------------------------------------

--
A bit more of info on the problem:
Onboard SCSI controller that shows in "sh conf" is QLogic ISP1020.
I am trying to connect DLT tape drive Quantum DLT7000 35/70 GB.
The box is AlphaServer 1000A 5/333.
Five more devices sits internally on the same SCSI bus, 4 hard drives
and CDROM.
Internal DDS tape used SCSI ID 5.
I have termination on external SCSI connector, but it doesn't seem to do
anything.
Everything works whether it's connected or not.
Same story with SRM variable pka0_soft_term.
I tried to connect DLT to external connector with and without tape
terminator, 
didn't make any difference. Not detected.
I tried to connect again internal tape drive while DLT was connected to
external connector.
Internal tape was detected. The box simply doesn't pay any attention to
what is connected on external connector.
Some responses suggested that external connector doesn't work.
So the question is why it doesn't work. 
It should, because it's there.
Some responses suggested that external connector doesn't work, if any
devices are connected internally. Well, it's simply not true, because we
have 255s with NCR 810 SCSI controller, and external connection works
while number of devices are connected internally.
And, of course, connectors are the same, otherwise I wouldn't be able to
connect.
Another response was: "By adding the DLT to the external port you have
the bus adpater in the middle of the chain". This is why it doesn't
work. 
OK. How to get DLT to the correct end of the chain? If the external
connector is in the middle.
Thanks a lot to everyone who took their time to reply.
The problem remains unresolved, though.
I would like to ask anyone who were ever able to connect DLT to external
connector on AS1000A, 
to let me know. That would eliminate one more variable in my search.
Best regards 
Nik Tarasyuk
Snowy Hydro
Australia

Received on Wed Oct 17 2001 - 03:07:51 NZDT