A buddy of mine works at IBM, he has a big ass SCSI raid array (DS300) on which he runs RAID5 (which is bad, BTW). He wanted to know what the overhead of running software RAID10 (aka RAID1+0) on this system would be. His numbers are here.

This is part of my [xen box setup]{rtag/xen-box-setup} “series”. :)

I’ve installed debian on a RAID1 device, /dev/md0. This takes up a fraction of the disk, and my plan is to create a large LVM2 group on another RAID1 that I can use to dynamically create devices for my xen domains.