On Tue, 29 Jan 2013, Artem Kuchin wrote:
29.01.2013 18:57, Warren Block:
On Tue, 29 Jan 2013, Artem Kuchin wrote:
The Handbook chapter on gmirror talks about the problems with GPT and GEOM
metadata. In short: right now, they conflict. It's possible to mirror GPT
partitions, but be aware that if you mirror more than one partition on a
drive, a rebuild after replacing a drive could thrash the heads as mirrors
are rebuilt simultaneously.
http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/geom-mirror.html
So,
gmirror+GPT=conflict on last sector
GPT+gmirror = hardrive head kill
nice...
So, for no more than 2TB disks the best way to go is GMIRROR of the drive
+PARTITION on top of it?
GPT partitions should work, just limit it to one mirrored partition per
drive.
Or maybe there is a way to instruct gmirror do rebuild only what i say
(manual rebuild) ?
'gmirror configure -n' ? Have not tried it. The trick would be to do
that before multiple mirrors start rebuilding, which they will as soon
as geom_mirror.ko is loaded.
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