State of gvinum RELENG_5 or RELENG_5_4 ?!

[secmgr]

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
>downtime...
>
>Greetings, 	Peter
>
>  
>
What steps did you take to the gmirror the disk so you could get your 
data back?

At this point, I'm thinking that as far as S/W RAID goes in FreeBSD, the 
"R" is pretty meaningless

jim