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Date:      Mon, 11 Jan 1999 17:49:37 +0300 (MSK)
From:      "Igor Timkin" <ivt@gamma.ru>
To:        current@FreeBSD.ORG
Subject:   ccd problem (3.0-REL ?)
Message-ID:  <199901111449.RAA19406@crocus.gamma.ru>

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Hello,

I am use ccd for news server from 2.1.5 whithout any problems.
But today I got unexpected problem on server which run 3.0-RELEASE :(

/etc/ccd.config:
ccd0	1024	0	/dev/da0d /dev/da1d

disklabel ccd0:
# /dev/rccd0c:
type: CCD
disk: ccd
label: default label
flags:
bytes/sector: 512
sectors/track: 2048
tracks/cylinder: 1
sectors/cylinder: 2048
cylinders: 1568
sectors/unit: 3212800
rpm: 7200
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]
  c:  3212802        0    4.2BSD     1024  8192    16   # (Cyl.    0 - 1568*)

disklabel da0:
# /dev/rda0c:
type: SCSI
disk: da0s1
label: 
flags:
bytes/sector: 512
sectors/track: 63
tracks/cylinder: 255
sectors/cylinder: 16065
cylinders: 263
sectors/unit: 4241097
rpm: 7200
interleave: 1
trackskew: 0
cylinderskew: 0
headswitch: 0           # milliseconds
track-to-track seek: 0  # milliseconds
drivedata: 0 

8 partitions:
#        size   offset    fstype   [fsize bsize bps/cpg]
  a:   128520  1606500    4.2BSD     1024  8192    16   # (Cyl.  100 - 107)
  b:  1606500  1735020      swap                        # (Cyl.  108 - 207)
  c:  4241097        0    unused        0     0         # (Cyl.    0 - 263*)
  d:  1606500        0    4.2BSD        0     0     0   # (Cyl.  100 - 99)
[...]

disklabel da1:
# /dev/rda1c:
type: SCSI
disk: da1s1
label: 
flags:
bytes/sector: 512
sectors/track: 63
tracks/cylinder: 255
sectors/cylinder: 16065
cylinders: 263
sectors/unit: 4241097
rpm: 7200
interleave: 1
trackskew: 0
cylinderskew: 0
headswitch: 0           # milliseconds
track-to-track seek: 0  # milliseconds
drivedata: 0 

8 partitions:
#        size   offset    fstype   [fsize bsize bps/cpg]
  b:  1606500  1606500      swap                        # (Cyl.  100 - 199)
  c:  4241097        0    unused        0     0         # (Cyl.    0 - 263*)
  d:  1606500        0    4.2BSD        0     0     0   # (Cyl.  100 - 99)

dd if=/dev/rccd0c of=/dev/null bs=1m count=1568 -- O.K.

When I type
dd if=/dev/rccd0c of=/dev/null bs=1m
or
dd if=/dev/rccd0c of=/dev/null bs=1m skip=1568 count=1
then system is locked (dd wait ``physstr''). ccd0c have ~1568.75 1M blocks.

dd if=/dev/rda0d of=/dev/null bs=1m
and
dd if=/dev/rd10d of=/dev/null bs=1m
is O.K.

Is this a bag in ccd driver ?

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