Re: Software RAID1 (with non-identical discs) performance

From: Jan Engelhardt
Date: Tue Dec 19 2006 - 10:44:48 EST



>Think of "PnP geometry" supported by all nowadays drives.
>
>It's 255 heads, 63 sectors per track, and whatever number of cylinders.

You do not really need the 255-63-X PNP mode. Given a hard disk small
enough, VMware may make it a 16-63-X, 16-64-X, or something like
that. Still works as intended.

You see, the kernel mostly gives a damn about CHS, since the moment
the partition table is scanned, it is translated into LBA offsets (
part of that should be seen in /proc/partitions).


-`J'
--
-
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/