We received this message on our email in error. It is addressed to you.
> -----Original Message-----
> From: Eugene Blanchard [SMTP:[EMAIL PROTECTED]]
> Sent: Friday, December 04, 1998 2:12 PM
> To: [EMAIL PROTECTED]
> Subject: Successfully raid auto recovery story and a few
> questions too!
>
> I am running raid0 over raid1. Two striped pairs mirrored. Two
> internal
> scsi drives and two external drives - each in their own case. 4
> separate
> scsi controllers (actually 2 dual channel controllers).
>
> They were rewiring the lab where the raid system exists and decided
> that
> they needed to move it. So being cabling guys, they carefully moved
> the
> tower and two external scsi boxes. Unfortunately, they disconnected
> one
> of the external scsi drives from the controller which brought the
> linux
> box to a grinding halt with an error message from the controller card
> (aic7xxx driver). The error message indicated that scsi0 had timed out
> and it was trying harder to reconnect.
>
> I could not login to shutdown or reboot. I tried disconnecting the
> power
> to the UPS, hoping that the UPS daemon would still work and shutdown
> but
> no luck. I then tried shutting off and on scsi0 drive to see if that
> would help - no luck.
>
> So next, I tried the three finger salute and nothing. So off went the
> power. When I turned it back on, they raid rebuilt itself for about 45
> minutes and then I could log on in a "crippled" mode while it finished
> rebuilding and fixing the raid devices which took about another 30
> minutes.
>
> Voila, it was back to normal! Fantastic. Kudos to you raid developers!
>
> Now for the questions: If a hard-drive fails like in this case,
> shouldn't only half the mirror be affected? Couldn't the system still
> function on the good half? This looks to be the aic7xxx driver
> problem?
> Why would the hardware failure of the aic7xxx driver to communicate
> with
> a drive knock out the complete system?
>
> I would think that if a drive failed running a mirrored raid that the
> system would realize this, shut down the bad mirrored half, send an
> error message to everyone (root?) and function on the good half of the
> mirror.
>
> TIA
