[TriLUG] Moving /home and others to new partitions
slitt at troubleshooters.com
Tue Jan 18 10:44:19 EST 2005
On Tuesday 18 January 2005 10:24 am, Rick DeNatale wrote:
> Some time ago, with advice from the list, I added a couple of 180GB
> IDE/ATA drives to my system which was running on two 9GB SCSI drives.
> I've now gotten to the point where one of the SCSI drives is near to
> overflowing so I need to move some stuff to one or more partitions on
> the big disks.
> What's the best way to accomplish this safely? I know that I need to
> create a partition for each of these, temporarily mount it, cp the
> files, test the copy, delete the files from the original location and
> then remount to the (now empty) original directory.
> so as an example I'm thinking to move the /public directory
> 1) Fdisk to create partitions and make filesystems
> 2) sudo mount /dev/hdcx /mnt/temp
> 3) Stop samba, atalk, cron services
> 4) sudo cp -al /public /mnt/temp
> 5) test somehow that the copy worked. Suggestions?
> 6) sudo rm -Rf /public/*
> 7) restart services
Without addressing any of your other questions, I'd like to give some advice
on the copy. Most people accomplish this type of tree copy not with the cp -R
command, but with either tar or cpio. The reason is that these archiving
utilities really do a good job with ownership, permissions, timestamps,
hardlinks and symlinks.
The following script is my cptree command, that copies a tree from one place
to another. I've used it in my backups for years, and as far as I can tell it
works perfectly. Mine uses tar, but you can do something similar with cpio.
#=========== Start of script, delete this line ===============
echo Tree copying $1 to $2
tar -cvf - $1 | tar --atime-preserve -C $2 -xf -
#=========== End of script, delete this line ===============
The sleep command is so I get a chance to see what's copying to what before
all the copying scrolls the screen, but it certainly isn't necessary to the
actual functioning of the script.
Founder and acting president: GoLUG
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