From owner-freebsd-current  Wed Aug 25  9:56:43 1999
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Date: Wed, 25 Aug 1999 13:01:14 -0400 (EDT)
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Organization: Cybernet Systems
From: "Mark J. Taylor" <mtaylor@cybernet.com>
To: current@freebsd.org
Subject: newfs of a ccd failing?
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I've had this problem since at least FreeBSD 3.1-RELEASE (it works in
2.2.7/2.2.8).  Same problem in 3.2-RELEASE and -current (as of last night).

Can someone reproduce this error?  I can't believe that you can't newfs
a ccd...  did I miss something?



spiffy# ./ccdtest.sh 
[snip]
newfs /dev/rccd0c
Warning: 16 sector(s) in last cylinder unallocated
/dev/rccd0c:    204784 sectors in 50 cylinders of 1 tracks, 4096 sectors
        100.0MB in 4 cyl groups (16 c/g, 32.00MB/g, 6272 i/g)
super-block backups (for fsck -b #) at:
 32, 65568, 131104, 196640
newfs: ioctl (WDINFO): No such process
newfs: /dev/rccd0c: can't rewrite disk label



I believe that there is a problem in/near ufs/ufs/ufs_disksubr.c where it
says that it requires an existing disklabel before it writes a new one.
If I change the "#if 1" to an "#if 0" in it, then I don't get this failure.




Here's my test script:

#!/bin/sh
#
# ccdtest.sh
#
# Build a 100 MByte linear ccd from a vnode and newfs it.
#


set -v
set -e

ccdconfig -u ccd0 2> /dev/null || true
vnconfig -u /dev/vn0 2> /dev/null || true

(cd /dev && ./MAKEDEV ccd0 vn0)

if [ ! -f /var/tmp/vn0 ]; then
  dd if=/dev/zero of=/var/tmp/vn0 bs=1024 count=102400
fi

vnconfig -e -s labels /dev/vn0 /var/tmp/vn0

disklabel -w -r vn0 auto
echo "Make 'c' a 4.2BSD type filesystem.  [press Enter now]"
read dummy
disklabel -e vn0

ccdconfig -c ccd0 0 0 /dev/vn0c

newfs /dev/rccd0c

ccdconfig -u ccd0 || true
vnconfig -u /dev/vn0 || true







-Mark Taylor
NetMAX Developer
mtaylor@cybernet.com
http://www.netmax.com/



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