Joost Roeleveld wrote:
On Thursday, November 17, 2011 10:43:28 AM Florian Philipp wrote:
Am 17.11.2011 07:50, schrieb Dale:
[...]
One more question. I have two drives. A 250Gb and a 750Gb. Originally
the data was on the 750Gb drive. I set the 250Gb up on LVM then moved
things over from the 750Gb. I then added the 750Gb to the VG and
resized the file system. So, in theory the data is on the 250Gb drive.
Let's say I want to remove the 250Gb drive. I would use pvmove to do
that right? When I ran pvmove /dev/sdb, which is the 250Gb drive, then
it would remove all the data from that drive so that it could be
removed. Am I close?
I'm not planning to do that but just wanting to get a better
understanding of this LVM thing.
Dale
Yes, that is correct. It moves the data by mirroring it temporarily on
the new location before updating the metadata so that only the new
location is used. Therefore you can safely reboot or abort operations.
Also, this will only work if the VG has sufficient unused space (eg. not used
by LVs) on the other disk(s) to accomodate the data moved.
--
Joost
Thanks. Clear as mud now. lol I'm getting there. Is there a tool to
see if there is enough room to do this before trying it?
Curious about gkrellm and how it will see the new drives now. May be
interesting.
Dale
:-) :-)
--
I am only responsible for what I said ... Not for what you understood or how
you interpreted my words!
