Date: Sat, 3 Oct 1998 16:38:05 -0400 (EDT) From: Brian Tao <taob@risc.org> To: FREEBSD-CURRENT <freebsd-current@FreeBSD.ORG> Subject: devstat_end_transaction: HELP!! busy_count is < 0! Message-ID: <Pine.GSO.3.96.981003162648.23916K-100000@tor-dev1.nbc.netcom.ca>
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This message seems to be harmless enough, based on what I see (or
don't see) in /usr/src/sys/kern/subr_devstat.c:180, but I presume the
printf was put there as warning flag if ds->busy_count was decremented
below 0. From my best recollection, I was attempting to mount two
MS-DOS filesystems on wd0s1 and wd0s3 (wd0s2 is the FreeBSD
partition). The mountmsdosfs() errors are from mounting wd0s3, which
it can't see to do (perhaps because the partition type != 6?).
This is on a Sep 30 kernel, ncr0 driver, wd0 and da0 drives
present.
Oct 3 10:26:39 cabal /kernel: devstat_end_transaction: HELP!! busy_count is < 0!
Oct 3 10:26:39 cabal last message repeated 20 times
Oct 3 10:26:39 cabal /kernel: dev
Oct 3 10:26:39 cabal /kernel: stat_end_transaction: HELP!! busy_count is < 0!
Oct 3 10:26:39 cabal /kernel: devstat_end_transaction: HELP!! busy_count is < 0!
Oct 3 10:26:39 cabal last message repeated 17 times
Oct 3 10:26:40 cabal /kernel: mountmsdosfs(): bad bpb
Oct 3 10:28:25 cabal /kernel: mountmsdosfs(): bad bpb
# fdisk wd0
******* Working on device /dev/rwd0 *******
parameters extracted from in-core disklabel are:
cylinders=1108 heads=255 sectors/track=63 (16065 blks/cyl)
Figures below won't work with BIOS for partitions not in cyl 1
parameters to be used for BIOS calculations are:
cylinders=1108 heads=255 sectors/track=63 (16065 blks/cyl)
Media sector size is 512
Warning: BIOS sector numbering starts with sector 1
Information from DOS bootblock is:
The data for partition 1 is:
sysid 6,(Primary 'big' DOS (> 32MB))
start 63, size 4192902 (2047 Meg), flag 0
beg: cyl 0/ sector 1/ head 1;
end: cyl 260/ sector 63/ head 254
The data for partition 2 is:
sysid 165,(FreeBSD/NetBSD/386BSD)
start 4192965, size 6281415 (3067 Meg), flag 80 (active)
beg: cyl 261/ sector 1/ head 0;
end: cyl 651/ sector 63/ head 254
The data for partition 3 is:
sysid 15,(Extended DOS, LBA)
start 10474380, size 7325640 (3576 Meg), flag 0
beg: cyl 652/ sector 1/ head 0;
end: cyl 1023/ sector 63/ head 254
The data for partition 4 is:
<UNUSED>
dmesg output:
wdc0 at 0x1f0-0x1f7 irq 14 on isa
wdc0: unit 0 (wd0): <ST39140A>
wd0: 8693MB (17803440 sectors), 17662 cyls, 16 heads, 63 S/T, 512 B/S
wd0: ATA INQUIRE valid = 0007, dmamword = 0007, apio = 0003, udma = 0407
[...]
ncr0: restart (scsi reset).
(probe6:ncr0:0:6:0): INQUIRY. CDB: 12 1 80 0 ff 0
(probe6:ncr0:0:6:0): ILLEGAL REQUEST asc:24,0
(probe6:ncr0:0:6:0): Invalid field in CDB sks:c8,1
pass0 at ncr0 bus 0 target 3 lun 0
pass0: <SEAGATE ST34573N 5958> Fixed Direct Access SCSI2 device
pass0: Serial Number LN496865000019070BR8
pass0: 20.0MB/s transfers (20.0MHz, offset 15), Tagged Queueing Enabled
pass1 at ncr0 bus 0 target 6 lun 0
pass1: <TOSHIBA CD-ROM XM-6201TA 1030> Removable CD-ROM SCSI2 device
pass1: 10.0MB/s transfers (10.0MHz, offset 16)
da0 at ncr0 bus 0 target 3 lun 0
da0: <SEAGATE ST34573N 5958> Fixed Direct Access SCSI2 device
da0: Serial Number LN496865000019070BR8
da0: 20.0MB/s transfers (20.0MHz, offset 15), Tagged Queueing Enabled
da0: 4340MB (8888924 512 byte sectors: 255H 63S/T 553C)
cd0 at ncr0 bus 0 target 6 lun 0
cd0: <TOSHIBA CD-ROM XM-6201TA 1030> Removable CD-ROM SCSI2 device
cd0: 10.0MB/s transfers (10.0MHz, offset 16)
cd0: cd present [125703 x 2048 byte records]
[...]
Considering FFS root f/s.
changing root device to wd0s2a
wd0s1: type 0x6, start 63, end = 4192964, size 4192902 : OK
wd0s2: type 0xa5, start 4192965, end = 10474379, size 6281415 : OK
wd0s3: type 0xf, start 10474380, end = 17800019, size 7325640 : OK
wd0s5: type 0xb, start 10474443, end = 17800019, size 7325577 : OK
da0s1: type 0xa5, start 63, end = 8883944, size 8883882 : OK
--
Brian Tao (BT300, taob@risc.org)
"Though this be madness, yet there is method in't"
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