Date: Wed, 31 Jan 1996 21:46:55 -0800 (PST) From: Jaye Mathisen <mrcpu@cdsnet.net> To: Joe Greco <jgreco@solaria.sol.net> Cc: hackers@freebsd.org Subject: Re: No SCSI recovery - yet another gripe Message-ID: <Pine.BSF.3.91.960131214633.15664W-100000@schizo.cdsnet.net> In-Reply-To: <199602010504.XAA28690@solaria.sol.net>
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Justin mentioned one time that he was working on the recovery code. It's doing the same thing for me as well. On Wed, 31 Jan 1996, Joe Greco wrote: > This is the second time this week my news box has frozen with a SCSI error > of some sort on the screen. This time: > > ahc1: target 3, lun0 (sd23) timed out > sd23(aha1:3:0): BUS DEVICE RESET message queued. > ahc1:A:3: no active SCB for reconnecting target - issuing ABORT > SAVED_TCL = 0x30 > ahc1: target 3, lun0 (sd23) timed out > _ > > The SCSI system works GREAT when all is fine and dandy. However, this sort > of error "recovery" sucks - a panic and reboot is preferable to a dead > freeze. > > In all reality I believe it has something to do with the relative > reliability of drive power connectors and the likelihood that all 14 of them > that are on news.sol.net work perfectly is less than 100%... so I will > tackle the problem from a hardware standpoint, as I believe that the source > is a loose power connection somewhere. On the other hand, consider this a > plea for the SCSI gods to improve the error handling somehow! I hear great > games talked on -hackers and all, layered device independent error handling, > etc... a free beer to the person(s) who implement(s) it. ;-) > > For kicks, I have been known to take a SCSI disk and unplug it from a > Solaris based system while the system is running. The grace with which it > attempts to deal with the crisis is admirable. Sometimes the system even > continues to work if I plug the drive back in... :-) I don't expect that > anybody has the time or effort to spare to implement error recovery to this > sort of level, but the current "lock'n'hang" is a little too far to the > opposite extreme... > > Thanks and good evening, > > ... Joe > > ------------------------------------------------------------------------------- > Joe Greco - Systems Administrator jgreco@ns.sol.net > Solaria Public Access UNIX - Milwaukee, WI 414/342-4847 >
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