Date: Wed, 14 Jun 1995 12:32:22 +0200 (MET DST) From: Christoph Kukulies <kuku@gilberto.physik.rwth-aachen.de> To: thomas@ghpc8.ihf.rwth-aachen.de (Thomas Gellekum) Cc: freebsd-hackers@freefall.cdrom.com (user alias) Subject: Re: Problem adding a second SCSI disk on 1542CF Message-ID: <199506141032.MAA23483@gilberto.physik.rwth-aachen.de> In-Reply-To: <199506140923.LAA01388@ghpc6.ihf.rwth-aachen.de> from "Thomas Gellekum" at Jun 14, 95 11:23:11 am
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>
> Moin moin,
>
> I hope I didn't misinterpret the charter for this list, if so, feel
> free to move it around.
>
> I'm having problems adding a second SCSI disk. The new disk is an
> IBM DSAS-3540. I have tried it on two machines, the one at home:
>
> FreeBSD 2.0-RELEASE #0: Tue Jun 13 15:17:16 MET DST 1995
> root@fenchurch:/usr/src/sys/compile/FENCHURCH
> CPU: i386DX (386-class CPU)
> real memory = 7995392 (1952 pages)
> avail memory = 6967296 (1701 pages)
> [...]
> wdc0 at 0x1f0-0x1f7 irq 14 on isa
> wdc0: unit 0 (wd0): <ST3283A>
> wd0: 233MB (479220 total sec), 978 cyl, 14 head, 35 sec, bytes/sec 512
> aha0: 1542C/CF detected, unlocking mailbox
> aha0: reading board settings, dma=5 int=11 (bus speed defaulted)
> aha0 at 0x330-0x333 irq 11 drq 5 on isa
> aha0 targ 0 lun 0: type 0(direct) fixed SCSI2
> aha0 targ 0 lun 0: <QUANTUM LPS270S 5900>
> sd0: 258MB (528808 total sec), 2740 cyl, 2 head, 96 sec, bytes/sec 512
> aha0 targ 1 lun 0: type 0(direct) fixed SCSI2
> aha0 targ 1 lun 0: <IBM DSAS-3540 S47W>
> sd1: 522MB (1070496 total sec), 3875 cyl, 3 head, 92 sec, bytes/sec 512
>
> and one here at work:
>
> FreeBSD 2.0-RELEASE #2: Wed Apr 12 17:59:59 MET DST 1995
> thomas@ghpc8.ihf.rwth-aachen.de:/usr/src/sys/compile/GHPC8
> CPU: i386DX (386-class CPU)
> real memory = 7995392 (1952 pages)
> avail memory = 6819840 (1665 pages)
> [...]
> aha0: 1542C/CF detected, unlocking mailbox
> aha0: reading board settings, dma=5 int=11 (bus speed defaulted)
> aha0 at 0x330-0x333 irq 11 drq 5 on isa
> aha0 targ 0 lun 0: type 0(direct) fixed SCSI2
> aha0 targ 0 lun 0: <IBM DSAS-3540 S47W>
> sd0: 522MB (1070496 total sec), 3875 cyl, 3 head, 92 sec, bytes/sec 512
> aha0 targ 1 lun 0: type 0(direct) fixed SCSI2
> aha0 targ 1 lun 0: <IBM DSAS-3540 S47W>
> sd1: 522MB (1070496 total sec), 3875 cyl, 3 head, 92 sec, bytes/sec 512
>
> sd1 is the new disk in both cases; it sits in the middle of the SCSI
> bus (thus not terminated); I use the same cable which works for the
> single drive configuration.
>
> The probe always succeeds on the second machine (at least as long as
> I played with it), the 1542 on the first machine sometimes locks up;
> the kernel probes the aha0, then it hangs. This also happened in
> the Disk Utility menu of the adapters SCSISelect software (it hangs
> while scanning for devices on the SCSI bus), so I don't think it's a
> FreeBSD specific problem.
>
> If the probe succeeds on machine I, both systems show the same
> behaviour: I can use the disk for a short while until
>
> sd1(aha0:1:0): timed out
> sd0(aha0:0:0): timed out
> adapter not taking commands.. frozen?!
> Debugger ("aha1542") called.
> AGAIN
> aha0: MBO not free
This is what I was getting with my Quantum Grand Prix,
too.
You may try to disable SYNC NEGOTIATION
for this ID # and look if this makes it work better (though
you may loose speed).
>
> These messages appear repeatedly, only way out is a reset. I
> haven't found a pattern which causes the locks. I guess the ``aha0:
> MBO not free'' is caused by the running process which tries to write
> to the disk when the 1542 hasn't emptied its buffers.
>
> The new drive works fine if it's alone on the SCSI bus. I have
> tried enabling/disabling the TI Sync Negotiation and/or Unit
> Attention on the drive to no avail.
>
> Any ideas? Any more info you need?
>
> tg
>
>
-Chris Christoph P. U. Kukulies kuku@gil.physik.rwth-aachen.de
FreeBSD blues.physik.rwth-aachen.de 2.0-BUILT-19950606 FreeBSD 2.0-BUILT-1995
0606 #0: Tue Jun 6 19:13:32 MET DST 1995 kuku@blues.physik.rwth-aachen.de
:/usr/src/sys/compile/BLUESGUS i386
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