Date: Tue, 10 Dec 1996 10:44:27 -0600 (CST) From: Bob Willcox <bob@luke.pmr.com> To: freebsd-hackers@freefall.FreeBSD.org (freebsd-hackers) Subject: Dump "short read error" on a Micropolis disk Message-ID: <199612101644.KAA29064@luke.pmr.com>
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I have this Micropolis disk that the dump program doesn't seem to
like. I continually get the following kinds of errors when dumping
it:
DUMP: Date of this level 0 dump: Tue Dec 10 10:00:12 1996
DUMP: Date of last level 0 dump: the epoch
DUMP: Dumping /dev/rsd6a (/usr3) to standard output
DUMP: mapping (Pass I) [regular files]
DUMP: mapping (Pass II) [directories]
DUMP: estimated 951885 tape blocks.
DUMP: dumping (Pass III) [directories]
DUMP: dumping (Pass IV) [regular files]
DUMP: 11.27% done, finished in 0:39
DUMP: 23.46% done, finished in 0:32
DUMP: 35.43% done, finished in 0:27
DUMP: short read error from /dev/rsd6a: [block -670977536]: count=3072, got=0
DUMP: short read error from /dev/rsd6a: [sector -670977536]: count=512, got=0
DUMP: short read error from /dev/rsd6a: [sector -670977535]: count=512, got=0
...
Conincident with the dump errors I get the following system messages:
Debugger("Slice code got negative blocknumber") called.
Which lead me to be suspect that I had some kind of partition/label
problem. But, alas, I have re-partitioned and re-labeled this disk
a couple of times with no effect.
The SCSI probe messages for this driver are:
ahc2: target 0 Tagged Queuing Device
(ahc2:0:0): "MICROP 2217-15MZ1001901 HZ30" type 0 fixed SCSI 2
sd6(ahc2:0:0): Direct-Access 1685MB (3450902 512 byte sectors)
I have also included the disks partition and label info below.
Thanks for any help you can give,
Bob Willcox
******* Working on device /dev/rsd6 *******
parameters extracted from in-core disklabel are:
cylinders=421 heads=256 sectors/track=32 (8192 blks/cyl)
Figures below won't work with BIOS for partitions not in cyl 1
parameters to be used for BIOS calculations are:
cylinders=421 heads=256 sectors/track=32 (8192 blks/cyl)
Warning: BIOS sector numbering starts with sector 1
Information from DOS bootblock is:
The data for partition 0 is:
sysid 165,(FreeBSD/NetBSD/386BSD)
start 32, size 3448800 (1683 Meg), flag 80
beg: cyl 0/ sector 1/ head 1;
end: cyl 420/ sector 32/ head 255
The data for partition 1 is:
<UNUSED>
The data for partition 2 is:
<UNUSED>
The data for partition 3 is:
<UNUSED>
# /dev/rsd6c:
type: SCSI
disk: MICROP
label:
flags:
bytes/sector: 512
sectors/track: 32
tracks/cylinder: 256
sectors/cylinder: 8192
cylinders: 420
sectors/unit: 3448800
rpm: 5400
interleave: 1
trackskew: 0
cylinderskew: 0
headswitch: 0 # milliseconds
track-to-track seek: 0 # milliseconds
drivedata: 0
3 partitions:
# size offset fstype [fsize bsize bps/cpg]
a: 3448800 0 4.2BSD 1024 8192 0 # (Cyl. 0 - 420*)
c: 3448800 0 unused 0 0 # (Cyl. 0 - 420*)
--
Bob Willcox politics, n:
bob@luke.pmr.com A strife of interests masquerading as a contest of
Austin, TX principles. The conduct of public affairs for private
advantage. -- Ambrose Bierce
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