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To: cman <costa@inner.cortx.com>
cc: freebsd-questions@FreeBSD.ORG
Subject: Re: SCSI Drive crash 
In-reply-to: Message from cman <costa@inner.cortx.com> 
	<199707022207.SAA00337@inner.cortx.com> .
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Date: Thu, 03 Jul 1997 09:00:50 -0400
From: Dennis Rockwell <dennis@bbn.com>
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On 2 Jul, cman wrote:

> I have a p150 with 64MB and a Quantum Fireball 4.3GB.  The problem isvery weird.
> Sometimes when i am compiling i hear the drive make a "click"
> and the whole system locks up.  th eonly way to get it back is to restart
> the system via the reset button.  When it runs through the bios scsi check,
> the HD doesn't appear.  So i open the box and shake some of the wires 
> (which looked fine) and then i reboot.  It locates the HD and continues to
> boot up FreeBSD 2.2.1.  

We have a slightly similar problem; we've never seen the
in-use lockup you describe, but the SCSI adapter cannot find
the drives after a reset, halt, or reboot, only after power
is cycled.  This did not happen with earlier revisions of
the Adaptec firmware.

Is it possible that a power cycle would get your system back
up, without wiggling any wires?

This is also under 2.2.1-RELEASE, off the WC CDROM.

Jul  2 14:00:09 drockwell /kernel: ahc0 <Adaptec 2940A Ultra SCSI host adapter> rev 1 int a irq 10 on pci0:17
Jul  2 14:00:10 drockwell /kernel: (ahc0:0:0): "QUANTUM FIREBALL_TM2110S 300X" type 0 fixed SCSI 2
Jul  2 14:00:10 drockwell /kernel: sd0(ahc0:0:0): Direct-Access 2014MB (4124736 512 byte sectors)

Dennis Rockwell                 dennis@bbn.com
Bolt Beranek & Newman
Systems & Technologies          +1-617-873-5745
Cambridge, MA                   +1-617-873-6091 (Fax)