Re: Growing an Array?

Followup to:  [ref]
By author:    Derek Vadala [off-list ref]
In newsgroup: linux.dev.raid

On Wed, 6 Nov 2002, Huntress Gary B NPRI wrote:

quoted

Actually I meant an array of six 73GB drives switching to six 180GB
drives, but thats conceptually the same.

I think that your best bet is to bring the new array online and copy the
data over using traditional methods. That's going to be the fastest way to
get the new array online. The other methods (backup and restore,
raidreconf) are either slower or don't apply specifically to this case.

Note that in large-scale data moves, like this, where you're reluctant
to take the system offline: if you can put the new storage online
(connected either to the same or a different server) you run the copy
process while the data is still online, then when you close for the
migration you can do an incremental update (rsync -aHS --delete is
good for this; if you want to be extra paranoid at the expense of
significantly slower execution rsync -acHS --delete.)  This is
typically a lot quicker than copying all the data once offline.

	-hpa

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