Date: Sun, 10 Nov 1996 10:46:38 +0100 (MET) From: Andreas Klemm <andreas@klemm.gtn.com> To: FreeBSD-gnats-submit@freebsd.org Subject: kern/1989: dump problems, if tagged command queueing is enabled Message-ID: <199611100946.KAA00717@klemm.gtn.com> Resent-Message-ID: <199611101010.CAA27867@freefall.freebsd.org>
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>Number: 1989
>Category: kern
>Synopsis: dump(8) fails to dump if tagged command queuing is enabled
>Confidential: yes
>Severity: serious
>Priority: medium
>Responsible: freebsd-bugs
>State: open
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Sun Nov 10 02:10:01 PST 1996
>Last-Modified:
>Originator: Andreas Klemm
>Organization:
>Release: FreeBSD 3.0-CURRENT i386
>Environment:
Part from boot message describing my SCSI hardware and settings
ahc0 <Adaptec 2940 SCSI host adapter> rev 3 int a irq 11 on pci0:12
mapreg[10] type=1 addr=0000e400 size=0100.
mapreg[14] type=0 addr=f7800000 size=1000.
reg16: ioaddr=0xe400 size=0x100
reg20: virtual=0xf5fbf000 physical=0xf7800000 size=0x1000
ahc0: Reading SEEPROM...done.
ahc0: aic7870 Single Channel, SCSI Id=7, 16 SCBs
ahc0: Reseting Channel A
ahc0: Downloading Sequencer Program...Done
ahc0: Probing channel A
Choosing drivers for scbus configured at 0
ahc0 waiting for scsi devices to settle
ahc0: target 0 synchronous at 10.0MHz, offset = 0xf
ahc0: target 0 Tagged Queuing Device
(ahc0:0:0): "IBM DORS-32160 WA0A" type 0 fixed SCSI 2
sd is configured at 0
sd0(ahc0:0:0): Direct-Access 2063MB (4226725 512 byte sectors)
sd0(ahc0:0:0): with 6703 cyls, 5 heads, and an average 126 sectors/track
ahc0: target 1 synchronous at 10.0MHz, offset = 0xf
ahc0: target 1 Tagged Queuing Device
(ahc0:1:0): "IBM DORS-32160 WA0A" type 0 fixed SCSI 2
sd is configured at 1
sd1(ahc0:1:0): Direct-Access 2063MB (4226725 512 byte sectors)
sd1(ahc0:1:0): with 6703 cyls, 5 heads, and an average 126 sectors/track
ahc0: target 4 synchronous at 4.4MHz, offset = 0x8
(ahc0:4:0): "TANDBERG TDC 4222 =07:" type 1 removable SCSI 2
st is configured at 0
st0(ahc0:4:0): Sequential-Access density code 0x0, 512-byte blocks, write-enabled
ahc0: target 6 synchronous at 4.0MHz, offset = 0xf
(ahc0:6:0): "TOSHIBA CD-ROM XM-3601TA 0725" type 5 removable SCSI 2
cd is configured at 0
cd0(ahc0:6:0): CD-ROM cd present [253041 x 2048 byte records]
pci0: uses 33558528 bytes of memory from f7800000 upto f9ffffff.
pci0: uses 272 bytes of I/O space from e400 upto e80f.
Kernel config file:
machine "i386"
cpu "I586_CPU"
ident BISDN
maxusers 64
options INET #InterNETworking
options FFS #Berkeley Fast Filesystem
options PROCFS #Process filesystem
options "COMPAT_43" #Compatible with BSD 4.3
options "SCSI_DELAY=8" #Be pessimistic about Joe SCSI device
options UCONSOLE #Allow users to grab the console
options IPFIREWALL #firewall
options IPFIREWALL_VERBOSE #print information about
options TELES_HAS_MEMCPYB # bisdn 0.97
options SYSVSHM,SYSVSEM,SYSVMSG # System V shared memory
options SHOW_BUSYBUFS # busy buffers on shutdown ?
options "I586_OPTIMIZED_BCOPY"
options "I586_OPTIMIZED_BZERO"
#options AHC_SCBPAGING_ENABLE
options AHC_TAGENABLE # still makes problems with tapes
options SCSI_REPORT_GEOMETRY
options MFS #Memory File System
config kernel root on sd0
controller isa0
controller pci0
controller fdc0 at isa? port "IO_FD1" bio irq 6 drq 2 vector fdintr
disk fd0 at fdc0 drive 0
controller ahc0
controller scbus0 at ahc0
disk sd0 at scbus0 target 0
disk sd1 at scbus0 target 1
tape st0 at scbus0 target 4
device cd0 at scbus0 target 6
options "MAXCONS=4"
device sc0 at isa? port "IO_KBD" tty irq 1 vector scintr
device npx0 at isa? port "IO_NPX" irq 13 vector npxintr
device sio0 at isa? port "IO_COM1" tty irq 4 vector siointr
device sio1 at isa? port "IO_COM2" tty irq 3 vector siointr
device lpt0 at isa? port? tty irq 7 vector lptintr
device ed0 at isa? port 0x300 net irq 10 iomem 0xcc000 vector edintr
device joy0 at isa? port "IO_GAME"
pseudo-device loop
pseudo-device ether
pseudo-device log
pseudo-device tun 1
pseudo-device pty 16
pseudo-device bpfilter 4 #Berkeley packet filter
controller snd0
device sb0 at isa? port 0x220 irq 5 drq 1 vector sbintr
device sbxvi0 at isa? drq 5
device sbmidi0 at isa? port 0x330
device opl0 at isa? port 0x388
# Teles S0/16.3 ###################################################### IRQ 9 ##
options IPI_VJ # Van Jacobsen header compression support
controller tel0 at isa? port 0xd80 net irq 9 vector telintr
pseudo-device disdn
pseudo-device isdn
pseudo-device ipi 4
pseudo-device itel 2
pseudo-device ispy 1
>Description:
If I enable tagged command queuing in the kernel, then I'm unable to
backup something on my TDC 4222. The mkdump commmand fails like this:
DUMP: Date of this level 0 dump: Sun Nov 10 10:28:35 1996
DUMP: Date of last level 0 dump: the epoch
DUMP: Dumping /dev/rsd0a (/) to /dev/nrst0
DUMP: mapping (Pass I) [regular files]
DUMP: mapping (Pass II) [directories]
DUMP: estimated 19161 tape blocks on 0.00 tape(s).
DUMP: DUMP: slave couldn't reopen disk: Device not configured
DUMP: The ENTIRE dump is aborted.
DUMP: Date of this level 0 dump: Sun Nov 10 10:28:40 1996
DUMP: Date of last level 0 dump: the epoch
DUMP: Dumping /dev/rsd0s3f (/var) to /dev/nrst0
DUMP: mapping (Pass I) [regular files]
DUMP: mapping (Pass II) [directories]
DUMP: estimated 21656 tape blocks on 0.00 tape(s).
DUMP: dumping (Pass III) [directories]
DUMP: DUMP: slave couldn't reopen disk: Device not configured
slave couldn't reopen disk: Device not configured
DUMP: The ENTIRE dump is aborted.
mkdump:: rewinding tape
mt: /dev/rst0: Device busy
On the console the following message will be shown (29 times)
Queue Full
Queue Full
..
Using tar doesn't cause problems...
>How-To-Repeat:
TAPE=/dev/rst0
NTAPE=/dev/nrst0
DUMP="dump 0uBbf 5000000 32 $NTAPE"
echo -n "mkdump:: rewinding tape"
mt -f $TAPE rewind \
&& echo " done."
$DUMP /dev/rsd0a # root
$DUMP /dev/rsd0s3f # var
echo -n "mkdump:: rewinding tape"
mt -f $TAPE rewind \
&& echo " done."
>Fix:
Workaround: disable tagged command queuing in the kernel.
Since one can use this workaround I choosed priority medium.
But it's a nasty bug, if you have many disks and you want to
make use of the advantages of tagged queuing and you are then
unable to dump the disks...
>Audit-Trail:
>Unformatted:
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