30.01.2013 18:06, Warren Block:
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.
Um... and how can i do that if i have a simple mirror with two drives
and want to mirror everything on them? As i understand i will have at least
bootable, swap and ufs parttions on those drives, that is 3 partitions
at least.
Artem
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