Date: Mon, 12 May 1997 11:38:01 +0100 (BST) From: bryan@fsel.com To: FreeBSD-gnats-submit@FreeBSD.ORG Subject: kern/3580: Bad LUN probes on Xyratex MCD540 drive Message-ID: <199705121038.LAA22984@metis.fsel.com> Resent-Message-ID: <199705121050.DAA11702@hub.freebsd.org>
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>Number: 3580
>Category: kern
>Synopsis: 2.2.1 probes invalid LUNs on Xyratex MCD540 drive
>Confidential: no
>Severity: serious
>Priority: low
>Responsible: freebsd-bugs
>State: open
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Mon May 12 03:50:01 PDT 1997
>Last-Modified:
>Originator: Bryan Scattergood
>Organization:
Formal Systems (Europe) Ltd
>Release: FreeBSD 2.2.1
>Environment:
Cyrix P120+ on an AI5TH (HX,PCI) motherboard
Adaptec 1542CF driving
0 730M Quantum Lightning 730S
2 Goldstar CDROM (GCD-R320)
4 Xyratex MCD 540I
(540M removable drive related to the 270M Syquests)
6 WangDAT Model 1300
>Description:
During boot
...
aha0 at 0x330-0x333 irq 11 drq 5 on isa
aha0 waiting for scsi devices to settle
(aha0:0:0): "QUANTUM LIGHTING 730S 241E" type 0 fixed SCSI 2
sd0(aha0:0:0): Direct-Access 699MB (1431760 512 byte sectors)
(aha0:2:0): "GOLDSTAR CD-ROM GCD-R320 1.0" type 5 removable SCSI 2
cd0(aha0:2:0): CD-ROM cd present [400000 x 2048 byte records]
(aha0:4:0): "Xyratex MCD 540I 5.30" type 0 removable SCSI 2
sd1(aha0:4:0): Direct-Access 515MB (1055416 512 byte sectors)
(aha0:4:1): "Xyratex MCD 540I 5.30" type 0 removable SCSI 2
sd2(aha0:4:1): Direct-Access 515MB (1055416 512 byte sectors)
sd2(aha0:4:1): timed out
sd2(aha0:4:1): timed out
adapter not taking commands.. frozen?!
AGAIN
sd2 could not mode sense (4). Using fictitious geometry
aha0: MBO 02 and bot 00 (free)
...
and then another half-hour or so while the driver times out on the
other 4:2 through 4:7, then on 5:0 and 6:0. The WangDAT isn't
recognised. It then can't find the CD-ROM drive, presumably since the
SCSI controller is jammed.
>How-To-Repeat:
Boot with the Xyratex in the SCSI bus under 2.2.1.
>Fix:
Problem caused by the new SCSI configuration scheme in scsiconf.c
(system worked fine under 2.1.6, although the Xyratex behaviour is
obviously broken). The Xyratex reports as a T_DIRECT and T_REMOV
device and so gets mapped to the unknowndev entry which defines
SC_MORE_LUS. Under 2.1.6 it mapped to the generic "sd" entry in
the knowndevs table which defines SC_ONE_LU.
Successfully worked round the problem by adding a
{ T_DIRECT, T_DIRECT, T_REMOV, "*", "*", "*", "sd", SC_ONE_LU }
entry in the knowndev table. More brutal alternative might be to
change unknowndev to SC_ONE_LU. More subtle might be to add a an
entry specfific the MCD540.
>Audit-Trail:
>Unformatted:
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