State of gvinum RELENG_5 or RELENG_5_4 ?!
security at jim-liesl.org
Wed May 11 10:43:03 PDT 2005
Peter Orlowski wrote:
>On Tue, May 10, 2005 at 11:24:12AM -0600, secmgr wrote:
>>Gabor Esperon wrote:
>>>How reliable is the gmirror subsystem?
>>gmirror seems fine as best as I can tell. I've been running it for a
>>few months on sata drives.
>I had gmirror running on two IDE drives for system and two SATA
>drives for user data. That was RELENG_5_3. When one of the SATA
>drives broke (later I got errors like
>ad4: FAILURE - READ_DMA status=51<READY,DSC,ERROR>
>on fscking) the whole system just stopped. I could switch
>consoles but nothing else. Nothing in the logs either. I believe
>it had lost all it's file systems.
>After power cycling, both mirrors were found but marked as broken.
>Gmirror chose the defective SATA disk as the intact one and started
>rebuilding the mirror from that - but fscking the mirror failed,
>obviously, so I ended up with one disk that was broken, but marked intact
>by gmirror and one disk the other way round.
>I had to erase the gmirror metadata on the intact disk to get it
>to work again.
>I'd say gmirror will save your data but it won't save you from some
What steps did you take to the gmirror the disk so you could get your
At this point, I'm thinking that as far as S/W RAID goes in FreeBSD, the
"R" is pretty meaningless
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