I've seen this happen when the SCSI controller that has the robotic arm is
not terminated properly. Check to make sure the terminator is good. I would
have STK replace the terminators just for a sanity check. It won't hurt.
Also, Are you sure the terminators are HVD? The wrong voltage terminator
could cause the same sort of activity.

Hope this helps,

Craig Everett
ceverett AT virtual DOT com

-----Original Message-----
From: veritas-bu-admin AT mailman.eng.auburn DOT edu
[mailto:veritas-bu-admin AT mailman.eng.auburn DOT edu]On Behalf Of Mike kiles
Sent: Thursday, August 02, 2001 6:40 AM
To: Leila Curic; 'gguenthe AT csc DOT com'; veritas-bu AT mailman.eng.auburn 
DOT edu
Subject: RE: [Veritas-bu] intermittent problems with Silo connectivity
net backup datacenter 3.4 Patch J0850645


I have seen sumthing similar at one of customers, the
env here is SUN3500, SOlaris7 and 9710 (10 x DLT7000).
We haven't been able to any answers from Veritas, SUN
or StorageTek. Latest Solaris patches have been
applied along with newest Jumbo patch 3.4.1.1?? from
Veritas and tape library firmware is 2.00.02

If any thing developes, I will post it.

Mike
--- Leila Curic <leila AT anyloan DOT com> wrote:
> We had exactly the same problem. Our NetBackup
> Master/Media Server is
> Windows 2000.
> Do you know what is the firmware version on your
> 9710?
> I had Veritas consultant here and he did not know
> what is the reason. But, I
> also had STK guy to check logs on DLT drives and he
> told me that one drive
> is bad and another is about to  be bad, and he also
> said that it might have
> caused my problems.
> Also, when I spoke to veritas they told me that my
> firmware version on my
> 9710 is not tested 2.00.02 I believe.
> Anybody knows what is really going on here>???
> Help!!!!!!!!
>
> -----Original Message-----
> From: gguenthe AT csc DOT com [mailto:gguenthe AT csc DOT com]
> Sent: Tuesday, July 31, 2001 8:07 AM
> To: veritas-bu AT mailman.eng.auburn DOT edu
> Subject: [Veritas-bu] intermittent problems with
> Silo connectivity
> netbackup datacenter 3.4 Patch J0850645
>
>
> We are having a bad problem with Silo connectivity.
>
> Netbackup Master/Media Server SUN E4000
>
> Two STK9710 Silos 10 DLT7000's EACH.
>
> We do a sgscan and all of the devices show up.
>
> Everything robtests fine.
>
> In the middle of backups, each drive eventually gets
> downed.
>
> bp.kill and then restart veritas, and the TLD's do
> not come up.
>
> sgscan shows all of the tape drives OK, but does no
> show the Silo(Robotic
> connection).
>
> Each robotic connection is on a separate SCSI
> Channel.
>
> Reboot the server, SGSCAN shows everything OK, TLD's
> come up fine.
>
> Backups run for a day or two, then the problem
> repeats.
>
> STK says the SILO's are OK.
>
>
>
> Greg Guenther
> CSC
> gguenthe AT csc DOT com
>
> _______________________________________________
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>
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>
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>
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