Mailinglist Archive: opensuse (2731 mails)
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RE: [SLE] SLES8 kernel panic when powering SCSI devices on/off on AIC7XXX driver
- From: "Eric Raskin" <eraskin@xxxxxxxxxxxx>
- Date: Mon, 11 Aug 2003 09:53:33 -0400
- Message-id: <05c101c3600f$f58b2a20$650aa8c0@ehrpc>
John:
Thanks for the reply. I will double-check that termination power comes from
more than one device. I do have an active terminator (with an LED
indicator). When I turn off the library, the indicator light goes out. So,
it appears you are correct and the library is providing termination.
I agree that it is a bad thing to turn off devices while up and running, but
sometimes you just don't have a choice. When the library hangs up while
users are on the system (including outside clients), I can't just shut
everything down. In any event, *almost nothing* should crash a running
system, no matter how dumb, right? Power switches to the server excluded,
of course. :-)
-----Original Message-----
From: John Andersen [mailto:jsa@xxxxxxxxxxxxxx]
Sent: Saturday, August 09, 2003 3:38 AM
To: eraskin@xxxxxxxxxxxx; SuSE-linux-e@xxxxxxxx
Subject: Re: [SLE] SLES8 kernel panic when powering SCSI devices on/off on
AIC7XXX driver
On Friday 08 August 2003 06:39, Eric Raskin wrote:
> I can generate a kernel panic at will by turning this device off or on.
> This concerns me a bit, because any mistake can crash my system! :-/ Here
> is the kernel panic I've received, extracted from /var/log/messages:
Where is termination power comeing from? If from the tape,
it might be a problem if the tape gets powerd down.
You might try term power from the controller. (In most
cases you can have more than one device supplying
termination power and not have a problem).
I also never rely on the built in terminators on any scsi
device and prefer to supply seperate active terminators.
I have similar external tape drives and can shut them off
and the server keeps on running. (Spits a few nasty-grams
into the log, but still runs).
All in all, its a bad idea to power off scsi devices if you
can avoid it...
--
_____________________________________
John Andersen
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Thanks for the reply. I will double-check that termination power comes from
more than one device. I do have an active terminator (with an LED
indicator). When I turn off the library, the indicator light goes out. So,
it appears you are correct and the library is providing termination.
I agree that it is a bad thing to turn off devices while up and running, but
sometimes you just don't have a choice. When the library hangs up while
users are on the system (including outside clients), I can't just shut
everything down. In any event, *almost nothing* should crash a running
system, no matter how dumb, right? Power switches to the server excluded,
of course. :-)
-----Original Message-----
From: John Andersen [mailto:jsa@xxxxxxxxxxxxxx]
Sent: Saturday, August 09, 2003 3:38 AM
To: eraskin@xxxxxxxxxxxx; SuSE-linux-e@xxxxxxxx
Subject: Re: [SLE] SLES8 kernel panic when powering SCSI devices on/off on
AIC7XXX driver
On Friday 08 August 2003 06:39, Eric Raskin wrote:
> I can generate a kernel panic at will by turning this device off or on.
> This concerns me a bit, because any mistake can crash my system! :-/ Here
> is the kernel panic I've received, extracted from /var/log/messages:
Where is termination power comeing from? If from the tape,
it might be a problem if the tape gets powerd down.
You might try term power from the controller. (In most
cases you can have more than one device supplying
termination power and not have a problem).
I also never rely on the built in terminators on any scsi
device and prefer to supply seperate active terminators.
I have similar external tape drives and can shut them off
and the server keeps on running. (Spits a few nasty-grams
into the log, but still runs).
All in all, its a bad idea to power off scsi devices if you
can avoid it...
--
_____________________________________
John Andersen
--
Check the headers for your unsubscription address
For additional commands send e-mail to suse-linux-e-help@xxxxxxxx
Also check the archives at http://lists.suse.com
Please read the FAQs: suse-linux-e-faq@xxxxxxxx
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