xfs_force_shutdown after Raid crash

[Steffen Knauf]

Hello,

sorry for the delay. I don't know whether it is interesting, but after a 
xfs_repair, the filesystem could completely rebuild.
Thanks Chritoph. I'm a little bit confused about "write back cache" and 
the "barrier" option.
On the RAID Controller "Write Cache" is enabled, "Write Cache Periodic 
Flush = 5 seconds" and "Write Cache Flush Ratio = 45 Percent".
My kernelversion is 2.6.16 (SLES10), so the default should be nobarrier. 
But i read in the official SGI xfs Training documentation that write 
Barrier are enabled by default on SLES10.
How can i check if barrier is on or off?. I don't find something in the log.

greets

Steffen

> On Fri, Jan 30, 2009 at 10:53:19PM +0100, Steffen Knauf wrote:
>   
>> Hello,
>>
>> after a raid crash (Raid Controller problem, 3 Disks of the Disk Group  
>> were kicked out oft the diskgroup), 2 of 3 partitions (XFS FS) were  
>> shutdown immediately.
>> Perhaps somebody has a idea, what's the best solution (xfs_repair?).
>>     
>
> This looks like you were running with a write back cache enabled on the
> controller / disks but without barriers.  xfs_repair should be able
> to repair the filesystem.  If you're lucky only the freespace-btrees
> are corrupted (as in the trace below) as xfs_repair can rebuild them
> from scratch. 
>
>
>