Re: detecting layout in RAID

Neil Brown (neilb@cse.unsw.edu.au)
Wed, 18 Dec 2002 09:55:45 +1100


On Thursday December 12, avaidya@unity.ncsu.edu wrote:
> hello,
> I am trying to detect layouts of the RAID configuration (I have a
> software RAID set up. ) Mine is currently left symmetric and the way I am
> trying to detect layout is to reaad consecutive blocks and look for
> whether there is a big dp when it has to move all the way across..

What exactly do you mean by "move all the way across"?
The only things that move are the drive which spins and the heads
which move back and forth.

I suspect that the way to detect differences in layout is to do lots
of random reads of different block sizes and look for different
throughput.

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