Oops. RAID 0 ist striping, and RAID 1 is mirroring (i.a.w. the first
1987 UCB RAID paper and the RAID Advisory Board). But as long as two
mirrored disks hang off the same controller, it's a SPOF (single point of
failure).
An external hardware RAID is always better in terms of data integrity,
irrespective of the RAID level (as long as it isn't 0) but as I understand
that was not the primary concern to write md.
-- Harald Milz (Harald.Milz@munich.netsurf.de)"Now the Lord God planted a garden East of Whittier in a place called Yorba Linda, and out of the ground he made to grow orange trees that were good for food and the fruits thereof he labeled SUNKIST ..." -- "The Begatting of a President"