If you have extra disk space it's fairly straightforward to use dump/
restore and re-partition.
I recently found myself desiring to re-slice my disk from a single
slice to 5 slices.
The basics were to dump the contents of my root, var, and usr
partitions to 3 files on another disk. I booted from a distribution
CD and installed a new OS on slice 2 with the default partitions.
Slice 1 became a 1g partition for DOS if the urge struck me later,
Slice 2 was a new OS and slice 3 was for the old/existing OS.
I relabeled my 2nd slice and restored the original OS to the various
partitions. The only thing I forgot was to re-name the partitions in
the /etc/fstab on my old OS. The change in slice number went like this:
/dev/ad0s1b none swap sw
0 0
/dev/ad0s1a / ufs rw
1 1
/dev/ad0s1e /tmp ufs rw
2 2
/dev/ad0s1f /usr ufs rw
2 2
/dev/ad0s1d /var ufs rw
2 2
Became
/dev/ad0s3b none swap sw
0 0
/dev/ad0s3a / ufs rw
1 1
/dev/ad0s3e /tmp ufs rw
2 2
/dev/ad0s3f /usr ufs rw
2 2
/dev/ad0s3d /var ufs rw
2 2
In your case if you want just the original slice you would do
something like:
boot from the live filesystem CD
fdisk your drive,
label (partition) your drive to the configuration you want
newfs each new partition,
mount the drive you used for backup
mount each of the new partitions of your original disk
Restore each of the partitions in turn.
Reboot from the original disk.
This looks a bit complex but is not too bad at all. This dump/
restore or even tar'ing filesystems is something we used a long time
ago to "image" NeXT systems. It's been quite reliable for me. Your
mileage may vary.
IJ
On Apr 29, 2006, at 3:24 AM, Low Kian Seong wrote:
Dear all,
Like the subject shows, I would just like to know how do i resize an
existing partition or slice, ermm with minimum loss of data of course.
Thanks.
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