On Tue, 29 Jan 2013, Artem Kuchin wrote:
My other concern is what happens when one drive goes down if we use gmirror?
Is it completelly transparent
and bad drive can be hot swapped while server is running and rebuild started?
I am thinking now about gpt+gmirror (including boot and swap)
As far a gmirror is concerned, yes, drives can be removed and new drives
inserted while the mirror is running. Hot swap is more of an issue with
the hardware. I have not tried it with SATA drives, although I think it
should work.
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
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