At 02:36 AM 7/25/2005, [EMAIL PROTECTED] wrote:
hi,
I am searching how to resize a virtual disk created with:
# dd if=/dev/zero of=newimage bs=1k count=5k
5120+0 records in
5120+0 records out
# vnconfig -s labels -c vn0 newimage
# disklabel -r -w vn0 auto
# newfs vn0c
Warning: 2048 sector(s) in last cylinder unallocated
/dev/vn0c: 10240 sectors in 3 cylinders of 1 tracks, 4096 sectors
5.0MB in 1 cyl groups (16 c/g, 32.00MB/g, 1280 i/g)
super-block backups (for fsck -b #) at:
32
# mount /dev/vn0c /mnt
When I decide to add more space to this virtual disk, I would like to be
able to
resize it.
The only solution I have is creating an other virtual disk and copy files
before
deleting the first one. It takes a long time and two time more space than
what I
want during the process.
any idea?
Here's a set of step by step instructions to go along with my previous reply:
adding space to a vn backed filesystem
unmount the file system to be enlarged
# umount /foo
unconfigure the vn node that needs to be enlarged
# vnconfig -u /dev/vn0
*** MAKE A BACKUP of the file that was attached to the vn device
# cp /path/to/oldfile /path/to/backup
create a new file that's as big as the amount of space you want to add
# dd if=/dev/zero of=addfile count=2000000
(2000000 blocks is 1GB)
cat the original file and the new space into a new file
# cat origfile addfile > newfile
associate the new file with the vn device
# vnconfig -u /dev/vn0
# vnconfig -s labels -c /dev/vn0 /path/to/newfile
use disklabel to increase the size of the "disk"
(you'll need to do a bit of math to get the right numbers, but make sure you
edit the size of the disk and the size of the "c" partition)
# disklabel -r -e vn0
now use growfs to enlarge the actual filesystem
(size for growfs should match the size of the "c" partition when you edited the
disklabel)
# growfs -s 4000000 /dev/vn0c
mount the newly enlarged filesystem
# mount /dev/vn0c /some/path
and that's it.
-Glenn
Cheers
Alex
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