Date: Sun, 1 Nov 1998 12:24:09 -0700 (MST) From: "Justin T. Gibbs" <gibbs@narnia.plutotech.com> To: Bernd Walter <ticso@cicely.de> Cc: current@FreeBSD.ORG Subject: Re: scsi disk (cam?) problems Message-ID: <199811011924.MAA08917@narnia.plutotech.com> In-Reply-To: <199811010132.UAA04810@bb01f39.unx.sas.com> <199811010208.TAA27408@panzer.plutotech.com> <19981101195246.10586@cicely.de>
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In article <19981101195246.10586@cicely.de> you wrote: > Very interesting. > I've saw the same message yesterday: > Oct 31 20:10:18 cicely5 /kernel: (da23:ahc4:0:1:0): Invalidating pack What kinds of power supplies are all of you using? The reason the pack is being invalidated is that the drive in question is not responding within a selection timeout period (250ms). This is usually because of a device no being there, but I suspect in this case the cause is a parallel I/O load that pushes your drives to their maximum power rating, saturating your power supply leaving one or more devices starving for power. Any I/O attempted while the drive is going through a power-on reset is likely to fail with a selection timeout. I will change the error handler for the selection timeout case to return EIO instead of ENXIO, but this is just a temporary work around until we can provide a better pack invalidation scheme in the system. -- Justin To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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