[Gllug] Which path is easier, Transfer swapout or swapout transfer?

[Justin Perreault]

Thank you for your response.

On Mon, 2008-08-18 at 11:35 +0100, Peter Corlett wrote:
> On Mon, Aug 18, 2008 at 01:04:09AM +0100, Justin Perreault wrote:
> > Okay, Mythdora using LVM I have one 1TB drive and one 80GB drive. Initial
> > install was done on the 80GB drive, therefore / and /boot with everything
> > else are on the smaller drive. I want to replace the 80GB drive with
> > another 1TB drive.
> 
> I'll assume here that all the disks are SATA, you have the 80GB disk as
> /dev/sda and the 1TB disk as /dev/sdb, and you want the new 1TB disk to be
> /dev/sda. The 80GB disk is then disposed of. The same basic principle
> applies whether it's IDE or SCSI, but I need to name the ports somehow...
> 
> Remove the 1TB drive from /dev/sdb put it in a safe place. Install the new
> 1TB disk as /dev/sdb. Boot single-user off the 80GB disk (which is still
> /dev/sda). LILO or GRUB will probably offer this option, but if not, edit
> the kernel command line and add "single" to it.
> 
> After you've booted, partition, LVM 

Unfortunately this is where I got stuck. There is an LV that spans the
two drives. With one of the drives not connected the system refused to
run LVM and related commands. I suspect due to LVM not being able to see
what it expected.

I am now exploring how to reduce a LV so that it resides wholly on the
old 1TB drive. I will then try again with the method you suggested. I am
hoping that LVM will not complain if it is merely unable to see a VG as
opposed to only being able to see 1/2 of a VG.

Failing that I can repartition the 80GB drive and relocate the 1
remaining VG to its own partition and work from there to continue
following the path suggested.

My window of opportunity for today is closing so I'll have to give it
another go tomorrow.

http://www.tldp.org/HOWTO/html_single/LVM-HOWTO has the documentation
that I am reviewing before my next attempt. (hmmm I could rsync all the
files from the lv on the old drive to the a lv on the new 1TB drive,
copy the few that I need from elsewhere and do a reinstall onto the old
1TB drive and then join the new 1TB drive to it.)

Thanks for the assistance so far. I feel I have learned more and I am
more confident that I am less likely to erase my data. Any additional
insights will be appreciated.

Justin

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