Date: Tue, 14 Nov 1995 00:43:27 GMT From: Mark Valentine <mark@linus.demon.co.uk> To: Julian Elischer <julian@ref.tfs.com>, joerg_wunsch@uriah.heep.sax.de Cc: freebsd-scsi@freebsd.org Subject: Re: kern/820: scsi tape problems Message-ID: <199511140043.AAA01203@linus.demon.co.uk> In-Reply-To: Julian Elischer's message of Nov 13, 2:22pm
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> Mark, can you show the traces again? I missed them.
query-pr -F output below (neat stuff, GNATS; I'd forgotten to save a copy
of my original problem report!).
> BTW what versions of everything?
An up to date -current after a recent make world (almost; I skip the tools
targets when everything's otherwise up to date).
> > What adapter are you using?
One of the early (fussy) 1542C's.
Mark.
From: Owner of many system processes <daemon@freefall.freebsd.org>
Date: Mon 13 Nov, 1995
Subject: query-pr output [-F 820]
>From mark@linus.demon.co.uk Sun Nov 12 15:40:39 1995
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Date: Sun, 12 Nov 1995 22:13:42 GMT
From: Mark Valentine <mark@linus.demon.co.uk>
Reply-To: mark@linus.demon.co.uk
To: FreeBSD-gnats-submit@FreeBSD.org
Subject: scsi tape problems
X-Send-Pr-Version: 3.2
>Number: 820
>Category: kern
>Synopsis: scsi tape problems
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: freebsd-bugs
>State: open
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Sun Nov 12 15:50:01 PST 1995
>Last-Modified: Mon Nov 13 00:00:01 PST 1995
>Originator: Mark Valentine
>Organization:
>Release: FreeBSD 2.2-CURRENT i386
>Environment:
FreeBSD 2.2-CURRENT #2: Sun Nov 12 19:29:29 GMT 1995
mark@linus.demon.co.uk:/usr/src/sys/compile/LINUS
CPU: i486 DX2 (486-class CPU)
Origin = "GenuineIntel" Id = 0x435 Stepping=5
Features=0x3<FPU,VME>
real memory = 16777216 (16384K bytes)
avail memory = 14868480 (14520K bytes)
Probing for devices on the ISA bus:
sc0 at 0x60-0x6f irq 1 on motherboard
sc0: VGA color <16 virtual consoles, flags=0x0>
sio0 at 0x3f8-0x3ff irq 4 on isa
sio0: type 16450
sio1 at 0x2f8-0x2ff irq 3 on isa
sio1: type 16550A
sio2 not found at 0x3e8
lpt0 at 0x378-0x37f irq 7 on isa
lpt0: Interrupt-driven port
lp0: TCP/IP capable interface
pca0 on motherboard
pca0: PC speaker audio driver
fdc0 at 0x3f0-0x3f7 irq 6 drq 2 on isa
fdc0: NEC 72065B
fd0: 1.44MB 3.5in
wdc0 at 0x1f0-0x1f7 irq 14 on isa
wdc0: unit 0 (wd0): <Maxtor 7850 AV>
wd0: 814MB (1667232 sectors), 1654 cyls, 16 heads, 63 S/T, 512 B/S
aha0 at 0x334-0x337 irq 11 drq 5 on isa
aha0 waiting for scsi devices to settle
(aha0:0:0): "QUANTUM PD1050iS 3072" type 0 fixed SCSI 2
sd0(aha0:0:0): Direct-Access 1003MB (2055096 512 byte sectors)
sd0(aha0:0:0): with 2448 cyls, 12 heads, and an average 69 sectors/track
(aha0:4:0): "WANGTEK 5525ES SCSI M74H 11" type 1 removable SCSI 1
st0(aha0:4:0): Sequential-Access density code 0xf, 512-byte blocks, write-enabled
(aha0:6:0): "TOSHIBA CD-ROM XM-3401TA 2873" type 5 removable SCSI 2
cd0(aha0:6:0): CD-ROM
cd0(aha0:6:0): NOT READY asc:3a,0 Medium not present
can't get the size
npx0 on motherboard
npx0: INT 16 interface
sb0 at 0x220 irq 5 drq 1 on isa
sb0: <MV Jazz16 3.1>
opl0 at 0x388 on isa
opl0: <Yamaha OPL-3 FM>
uart0 at 0x330 irq 9 on isa
uart0: <6850 Midi Interface>
joy0 at 0x201 on isa
joy0: joystick
RTC BIOS diagnostic error 16<memory_size,invalid_time>
new masks: bio c0004840, tty c003009a, net c003009a
WARNING: / was not properly dismounted.
[The Adaptec is a 1542C (an early one, but all devices are internal) -
SCSI_DELAY=15.]
>Description:
(1) I had a system hang while reading a QIC-120 tape (co-inciding with
the timeout shown below).
Nov 12 20:02:54 linus /kernel: st0(aha0:4:0): MEDIUM ERROR info:11 field replaceable unit: 1
Nov 12 20:18:21 linus /kernel: st0(aha0:4:0): timed out
The first error seems to be unrelated, since it didn't show up on
subsequent attempts, but the problem occurs repeatably at the same
place on the tape (about two thirds through).
The tape error isn't a simple retry - the head shuffles about on
the tape considerably. The tape wasn't written on this drive.
(Could this be a tape drive problem?)
On my third attempt I came out of X, and this time the system timed
out and trapped into DDB ("adapter not taking commands.. frozen?!").
(2) The system doesn't like to be rebooted while the tape is rewinding;
SCSI_DELAY=15 is nowhere near enough here! The system panics in the
usual way after a SCSI timeout.
Is this just because the probe isn't clever enough to delay talking
to the SCSI device, or should it be able to find out what it needs
from the device even while rewinding?
>How-To-Repeat:
Happens at the same position on my tape each time.
>Fix:
>Audit-Trail:
From: J Wunsch <j@uriah.heep.sax.de>
To: mark@linus.demon.co.uk
Cc: FreeBSD-gnats-submit@FreeBSD.org
Subject: Re: kern/820: scsi tape problems
Date: Mon, 13 Nov 1995 08:47:42 +0100 (MET)
As Mark Valentine wrote:
> Nov 12 20:02:54 linus /kernel: st0(aha0:4:0): MEDIUM ERROR info:11 field replaceable unit: 1
This is clearly a problem with your tape (and/or drive).
> Nov 12 20:18:21 linus /kernel: st0(aha0:4:0): timed out
This looks like a subsequent problem in the driver (since your tape
drive did lengthy attempts to recover from the above error). I've
once been discussing the problems of adapter timeouts with Peter
Dufault. I think we came to the conclusion to make something else
than now, but i forgot what it was. :-)
--
cheers, J"org
joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ -- NIC: JW11-RIPE
Never trust an operating system you don't have sources for. ;-)
>Unformatted:
--
"Tigers will do ANYTHING for a tuna fish sandwich."
"We're kind of stupid that way." *munch* *munch*
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