i think it's a bug but only happens with such massive mirror. very few people do more than 2-way mirrors that's probably it wasn't catched.

please do report the bug - it's critical.

On Fri, 24 Apr 2009, Peter Steele wrote:

This only happens with ad4. If ad6 for example goes offline in the same way, 
when it is reinserted
it does not become the dominant drive and resync its data with the other 
drives. Rather its data
is overwritten with the data from the 3 member mirror, as you'd expect.
looks like very strange bug. many times i got drives disconnected and
always gmirror resynced

If I just pull ad4 and then reinsert it without doing a reboot, everything 
works fine. The problem occurs when ad4 is pulled and then reinserted after the 
system is shutdown. When the system comes up, it doesn't get added back to the 
existing mirror but rather becomes the principal member of the mirror, using 
its old data. Not good.

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