[Gllug] Partioning advice needed

[Kostas Georgiou]

On Mon, Feb 19, 2007 at 01:53:40AM +0000, Anthony Newman wrote:

> Nix wrote:
> 
> I've also seen no mention of parity scrubbing of RAID 4/5/6 arrays under 
> Linux; anyone know if it's possible? I saw 500GB of data go down the pan 
> last year because of an undetected disk error on a 14 disk RAID5 array. 
> Which was nice.

echo check > /sys/block/md0/md/sync_action will do what you want I think,
I only run RAID 0/1 in md so I never checked it though.
Running regular check with smartmontools on the disks also helps.

> I probably should have mentioned that I was thinking "while both online 
> and mounted" in the same thought, although I failed to mention that at 
> any point. Resizing unmounted file systems is tantamount to recreating 
> them, and thus cheating :)

You can increase the size online in ext3, decreasing the fs used to require
an unmount last time I checked but it might have changed now. My users only
ask for more disk space so it doesn't bother me.

Kostas
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