On Wed, 30 Jan 2013, Artem Kuchin wrote:
30.01.2013 1:01, Warren Block:
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.
Please, clarify what you mean here.
If only one GPT partition on a drive is mirrored with another GPT
partition on another drive, head contention never comes up. There is
only one mirror.
It does nearly eliminate the usefulness of GPT partitioning.
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