Re: 2.6.17-mm4 raid bugs & traces

[Reuben Farrelly]

On 2/07/2006 4:25 a.m., Helge Hafting wrote:
> More mm4 raid-1 troubles.

> More than a little irritating, I need the SATA raid-1 to be in sync
> so lilo can install mm5 for me. 18 hours. 

Have you looked at enabling write-intent bitmaps on your raid-1 arrays?

With all the grief I have been having with RAID-1 recently, bitmaps have saved 
me very very serious amounts of time resyncing the array.

Typically after my raid array has had devices/partitions kicked out (such as 
when loading -mm5) it takes only 2-3 seconds to bring each non-fresh 
device/partition back into the array and back up to sync (as opposed to 18 
hours...).

Neil wrote a good posting at http://lkml.org/lkml/2005/12/4/118 about it (which 
should be a FAQ entry in itself).

reuben
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/