On 22 Mar 2005, at 15:23, Christofer C. Bell wrote:
On Tue, 22 Mar 2005 00:44:02 +0100, Felipe Alfaro Solana <lkml@xxxxxxx> wrote:
Nah! Use hardware RAID-1 (*true* hardware RAID-1, not those crappy pseudo-raid controller some manufacturers sell).
Please keep in mind that, in general, raid1 volumes created with hardware raid solutions are *not* portable between machines. If you upgrade your machine, you will more than likely have to reinstall your OS cleanly and recreate the mirror using whatever hardware raid tools the new motherboard provides. If your motherboard or hardware raid controller experiences a failure, you will either have to replace it with identical hardware or you will again need to reinstall your operating system clean and recreate the mirror.
Mirroring is extremely low overhead for software raid so if you'd like to maintain a portable raid volume, then software raid may be more appropriate for your purposes. I'd further suggest running a 4 disk configuration if you want mirrored boot devices for two operating systems, 2 disks per OS.
Yes, it's a valid point of view... however, software RAID is equally incompatible between different implementations (operating systems, for example), so I can only think of hardware RAID as a way of having RAID-1 across different operating systems on the same machine.
