On Tue, 29 Jan 2013 08:57:31 -0600, Warren Block <[email protected]>
wrote:
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
Why isn't gmirror more intelligent? I hate to use Linux as an example, but
mdadm won't simultaneously rebuild multiple RAID sets if they use the same
physical providers to prevent this. Could this be added as a feature? Even
a sysctl toggle?
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