On Thu, Jun 13, 2002 at 02:00:31PM -0500, Doug wrote: > So if I mirrored 2 drives linux would still see 2 drives instead of > one? Yes and no. At one level, the kernel recognizes that there are two separate drives, /dev/hda1 and /dev/hdc1 (or whatever). However, the md driver combines hda1 and hdc1 into /dev/md1. You format and mount md1, not hda1 or hdc1. (Touching hda1 or hdc1 directly would cause Bad Things to happen... Well, maybe not if you're doing a mirror, but why take that chance?) > Well I guess seeing 4 more ide devices (up to anyway) is better > than nothing. And in doing that have you noticed any performance loss? Works great for me, although I only do 2 devices on my HPT366 controller. If you put two drives on the same IDE channel and RAID them, you _will_ see a performance loss. When RAIDing (or any other time you're being performance-conscious), slave drives should be avoided, even if it means buying another IDE controller card. -- When we reduce our own liberties to stop terrorism, the terrorists have already won. - reverius Innocence is no protection when governments go bad. - Tom Swiss