>> 2 rotating parity disks ? Can you elaborate on how that works ? >> I have thought about using something else than raid5, where you would >> split the data across a number of disks, AND use a mirrored device for >> storing the parity on. I don't think it is the same as the above, but on Compaq ProLiants, they have Advanced Data Guard. http://h18004.www1.hp.com/products/servers/proliantstorage/arraycontrollers/adg/ With it you define the number of data drives(D) you want, and the number of parity drives(P). Obviously you need D + P drives, but no data is lost until you loose P+1 drives. The negative is even worse performance than RAID 5, but it does make for greater reliability. BTW: HP's (Compaq's) "low-end" FC array (MSA 1000) also support Advanced Data Guard. IIRC their mid-tier and high-end lines don't. Greg _______________________________________________ linux-lvm mailing list linux-lvm@sistina.com http://lists.sistina.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
