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Date: Thu, 06 Mar 1997 03:23:50 +0300
From: Dmitry Morozovsky <marck@rinet.ru>
Organization: Cronyx Ltd.
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To: Joerg Wunsch <joerg_wunsch@uriah.heep.sax.de>
CC: freebsd-hardware@freebsd.org
Subject: Re: NCR 810 troubles
References: <freebsd.hardware/Mutt.19970305235715.j@uriah.heep.sax.de>
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J Wunsch wrote:
> 
> As Dmitry Morozovsky wrote:
> 
> > After upgrading newsserver from cnews to inn,
> > regularly, there are very sad things such as:
> >
> > Mar  5 16:38:50 gw2 /kernel: ncr0: restart (ncr dead ?).
> > Mar  5 16:38:51 gw2 /kernel: sd5(ncr0:4:0): UNIT ATTENTION asc:29,0
> > Mar  5 16:38:51 gw2 /kernel: sd5(ncr0:4:0):  Power on, reset, or bus device reset occurred
> > Mar  5 16:38:51 gw2 /kernel: , retries:3
> > Mar  5 16:38:51 gw2 /kernel: sd3(ncr0:0:0): UNIT ATTENTION asc:29,0
> > Mar  5 16:38:51 gw2 /kernel: sd3(ncr0:0:0):  Power on, reset, or bus device reset occurred field replaceable unit: 14
> 
> Normally, this wouldn't even lead to a crash.  I've got a flakey disk
> that i can often ``cure'' by powering it off... after which i also see
> the unit attention, where the next retry will get everything back
> online.
> 
> If it crashes for you, and the unit attentions appear all of a sudden,
> i suspect you've got a broken (or overloaded) power supply.

	First, there was mistype with model name.
	Second, power supply is definitely *not* overloaded, because it is
separated in external SCSI box and used only for these 3 disks.
	Maybe, however, there's one of 3 disks partially broken with power
connector; however, it was used for long time previously at other place
and never fails. I'll check whether single disk disappears...

Sincerely,
D.Marck