Date: Wed, 01 Oct 1997 03:00:52 -0700 (PDT) From: Donald Burr <dburr@POBoxes.com> To: AIC7xxx List <aic7xxx@freebsd.org>, FreeBSD SCSI <freebsd-scsi@freebsd.org>, FreeBSD Hardware <freebsd-hardware@freebsd.org> Subject: Odd behavior of Wangtek 5525ES SCSI tape drive under 2.2.2 and A Message-ID: <XFMail.971001031306.dburr@POBoxes.com>
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I am the proud owner of a
(ahc0:4:0): "WANGTEK 5525ES SCSI 73R1" type 1 removable SCSI 2
st0(ahc0:4:0): Sequential-Access density code 0x0, drive empty
Wangtek 5525ES SCSI-2 tape drive (525MB QIC-525 drive). It's connected to
my brand-new Adaptec AHA-2940AU PCI SCSI controller (aic7860), on my
FreeBSD 2.2.2-RELEASE system.
This setup works pretty well. I've already done several successful dumps
to this device, and have created more tar tapes than I can shake a stick
at.
The weirdness comes with the `mt' command. Basically, any "mt" command
that causes the tape drive to spin (weof, retension, fsf, etc.) SOMETIMES
(probably 1 in 10 times) causes the system to "soft hang". Processes keep
running, I can switch to another VC and login, or telnet to the machine
over the network, etc. BUT the mt process is hung -- I can't exit with
Ctrl-C, or kill (even kill -KILL) it. Ctrl-Z fails to suspend the thing,
and the process fails to die on a reboot/shutdown (this results in the
"syncing disks...giving up" message). And the tape drive don't spin.
BUT, other commands that access the tape drive (tar, dump, even dd) work
fine!!!
unix% tar cv /some/dir
/some/dir/a
/some/dir/a/file
/some/dir/b/dir
/some/dir/c/file2
...tape drive chugs away, and finishes successfully
unix% dump 0auf /dev/rst0 /
DUMP: ....
[successful dump]
unix% dd if=/dev/rst0 of=/dev/zero
...blahblahblah
unix% mt retension
[ oops - hung. Big Red Button time. ]
I have tried the usual remedies -- checking cables and termination,
disconnecting all SCSI devices EXCEPT the tape drive, etc. Nothing helps.
As stated above, I run 2.2.2-RELEASE. I have tried one of the RELENG
kernels (970913 I think), with the same behavior. Unfortunately I'm not
man enough to try CURRENT. :)
My controller is an Adaptec AHA-2940AU PCI SCSI controller (aic7860). The
controller works great, and all of my other devices (JAZ, cd-rom, etc.)
work flawlessly.
Any ideas?
dmesg output follows:
Copyright (c) 1992-1997 FreeBSD Inc.
Copyright (c) 1982, 1986, 1989, 1991, 1993
The Regents of the University of California. All rights reserved.
FreeBSD 2.2.2-RELEASE #0: Mon Sep 15 01:19:35 PDT 1997
root@DonaldBurr.DonaldBurr.dyn.ml.org:/usr/src/sys/compile/DONALDBURR
CPU: AMD Am5x86 Write-Back (486-class CPU)
Origin = "AuthenticAMD" Id = 0x4f4 Stepping=4
Features=0x1<FPU>
real memory = 33554432 (32768K bytes)
avail memory = 30396416 (29684K bytes)
Probing for devices on PCI bus 0:
chip0 <SiS 85c496> rev 2 on pci0:5
vga0 <VGA-compatible display device> rev 71 on pci0:11
ahc0 <Adaptec 2940A Ultra SCSI host adapter> rev 1 int a irq 11 on pci0:13
ahc0: aic7860 Single Channel, SCSI Id=7, 3 SCBs
ahc0 waiting for scsi devices to settle
(ahc0:1:0): "NEC CD-ROM DRIVE:462 1.16" type 5 removable SCSI 2
cd0(ahc0:1:0): CD-ROM can't get the size
(ahc0:2:0): "iomega jaz 1GB H.72" type 0 removable SCSI 2
sd0(ahc0:2:0): Direct-Access
sd0(ahc0:2:0): ILLEGAL REQUEST asc:24,0 Invalid field in CDB
sd0 could not mode sense (4). Using ficticious geometry
1021MB (2091050 512 byte sectors)
sd0(ahc0:2:0): with 1021 cyls, 64 heads, and an average 32 sectors/track
(ahc0:4:0): "WANGTEK 5525ES SCSI 73R1" type 1 removable SCSI 2
st0(ahc0:4:0): Sequential-Access density code 0x0, drive empty
ed0 <NE2000 PCI Ethernet (RealTek 8029)> rev 0 int a irq 9 on pci0:15
ed0: address 00:00:b4:5a:4e:71, type NE2000 (16 bit)
Probing for devices on the ISA bus:
sc0 at 0x60-0x6f irq 1 on motherboard
sc0: VGA color <12 virtual consoles, flags=0x0>
lpt0 at 0x378-0x37f irq 7 on isa
lpt0: Interrupt-driven port
lp0: TCP/IP capable interface
sio0 at 0x3f8-0x3ff irq 4 on isa
sio0: type 16550A
sio1 at 0x2f8-0x2ff irq 3 on isa
sio1: type 16550A
sio2 at 0x3e8-0x3ef irq 5 on isa
sio2: type 16550A
wdc0 at 0x1f0-0x1f7 irq 14 flags 0x80ff80ff on isa
wdc0: unit 0 (wd0): <ST51080A>, 32-bit, multi-block-32
wd0: 1033MB (2116800 sectors), 2100 cyls, 16 heads, 63 S/T, 512 B/S
wdc1 at 0x170-0x177 irq 15 flags 0x80ff80ff on isa
wdc1: unit 0 (wd2): <Maxtor 7245 AT>, 32-bit, multi-block-32
wd2: 234MB (479632 sectors), 967 cyls, 16 heads, 31 S/T, 512 B/S
fdc0 at 0x3f0-0x3f7 irq 6 drq 2 on isa
fdc0: NEC 72065B
fd0: 1.44MB 3.5in
npx0 on motherboard
npx0: INT 16 interface
sb0 at 0x220 irq 10 drq 1 on isa
sb0: <SoundBlaster Pro 3.2>
opl0 at 0x388 on isa
opl0: <Yamaha OPL-3 FM>
sctarg0(noadapter::): Processor Target
Donald Burr <dburr@POBoxes.com> - Ask me for my PGP key | PGP: Your
WWW HomePage: http://DonaldBurr.base.org/ ICQ #1347455 | right to
Address: P.O. Box 91212, Santa Barbara, CA 93190-1212 | 'Net privacy.
Phone: (805) 957-9666 FAX: (800) 492-5954 | USE IT.
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