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.
In fact I just confirmed that if we reduce our mirror to just two members the
problem does not occur. The
We had a somewhat startling scenario occur with gmirror. We have systems with
four drives ad4, ad6, ad8, and ad10, with the OS setup on a mirrored slice
across all four drives. The ad4 drive failed at one point, due to a simple bad
connection in its drive bay. While it was offline, the system
Peter Steele wrote:
We had a somewhat startling scenario occur with gmirror. We have systems with
four drives ad4, ad6, ad8, and ad10, with the OS setup on a mirrored slice
across all four drives. The ad4 drive failed at one point, due to a simple
bad connection in its drive bay. While it
Ivan Voras wrote:
Peter Steele wrote:
We had a somewhat startling scenario occur with gmirror. We have systems
with four drives ad4, ad6, ad8, and ad10, with the OS setup on a mirrored
slice across all four drives. The ad4 drive failed at one point, due to a
simple bad connection in its
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
This definitely looks like a bug. Try asking again on the freebsd-geom@
list. Provide output of gmirror list.
I'll try that list...
So, your steps were:
1. ad4, ad6, ad8 and ad10 in a 4-way mirror
2. ad4 fails. At this point did you do a gmirror list? I.e. did
gmirror detect it failing?
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
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
2009/4/24 Peter Steele pste...@maxiscale.com:
This definitely looks like a bug. Try asking again on the freebsd-geom@
list. Provide output of gmirror list.
I'll try that list...
So, your steps were:
1. ad4, ad6, ad8 and ad10 in a 4-way mirror
2. ad4 fails. At this point did you do a gmirror
By kicked out you mean overwritten?
You should definitely look at gmirror list before and after.
Sorry for the confusion. By kicked out, what I meant was as gmirror started
up it took ad4 as the principal member, saw that it was previously part of a
mirror with three other drives and tried
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