Date: Sat, 19 Sep 1998 22:42:38 -0600 (MDT) From: "Justin T. Gibbs" <gibbs@narnia.plutotech.com> To: KATO Takenori <kato@ganko.eps.nagoya-u.ac.jp> Cc: current@FreeBSD.ORG Subject: Re: [CAM] Broken tagged queuing drive? Message-ID: <199809200442.WAA06694@narnia.plutotech.com> In-Reply-To: <19980920111101H.kato@gneiss.eps.nagoya-u.ac.jp>
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In article <19980920111101H.kato@gneiss.eps.nagoya-u.ac.jp> you wrote:
> My PC-98 box with AHA-2940UW +
>
> da2 at ahc0 bus 0 target 2 lun 0
> da2: <SAMSUNG WN321010S 1224> Fixed Direct Access SCSI2 device
> da2: 10.0MB/s transfers (10.0MHz, offset 15)
> da2: 2059MB (4218750 512 byte sectors: 8H 32S/T 16478C)
>
> dies with following message:
>
> (da2:ahc0:0:2:0) tagged openings now 32
> (da2:ahc0:0:2:0): SCB 0xe - timed out while idle, LASTPHASE == 0x1, SCSISIGI == 0x0
> SEQADDR == 0x9
> SSTAT1 == 0xa
> (da2:ahc0:0:2:0): Queuing a BDR SCB
> (da2:ahc0:0:2:0): Bus Device Reset Message Sent
> (da2:ahc0:0:2:0): no longer in timeout, status = 34c
> ahc_intr: AWAITING_MSG for an SCB that does not have a waiting messagepanic:: SCB = 14, SCB Control = 0, MSG_OUT = ff SCB flags = 0
> Debugger("panic")
I believe I've found the cause of this panic. I would appreciate it if
you could test to see if the next revision of aic7xxx.c survives the
timeout.
> Does the SAMSUNG WN321010S drive have broken tagged queuing? I
> applied following patch and it seems to work for me:
My guess is that the SAMSUNG blows away other pending transactions when
it sends a queue full message. You may want to try setting maxtags
to a value that will avoid the queue full response (perhaps 32 or 31).
--
Justin
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