Miguel Medalha spake the following on 5/22/2007 4:46 PM: >> You could always combine software raid and LVM. >> >> Create a RAID1 device using Software RAID. >> >> Then set up LVM with the apropriate LVM logical volumes under /dev/md0 >> or whatever. > > Ok, I'll accept that. My initial question remains, albeit under a > different form: > > - Create a single RAID 1 device with both entire disks and then put LVM > logical volumes on top > - Create several RAID devices, one for each mount point (md0, md1, md2 > and so forth) > > Which one would be better under the aspects of performance (CPU > utilization, disk > transfer rate, etc), data security and ability to recover from a disk > crash? > > Does LVM bring a performance penalty? I don't think LVM brings any penalty. But with raid mirrors on separate partitions, you could recover data with something as simple as a Knoppix disk. You can mount each partition and get to the data. If the LVM metadata becomes corrupt (less likely with LVM2, but it can happen) you have a harder time getting data back. The plus with LVM is snapshots, which give very reliable backups. -- MailScanner is like deodorant... You hope everybody uses it, and you notice quickly if they don't!!!!