On Tue, Oct 18, 2011 at 11:05 AM, Arun Khan <knura9 at gmail.com> wrote: > >> btw, dont think that these issues dont affect hardware raid - they do. >> its just that the management for these things is slightly more >> abstracted away and the controllers are better integrated with the disk >> cages. > > About 10 years ago, I had a h/w raid controller go bad (HDDs connected > via SCSI cable - no HDD bays involved). The replacement card > recreated the RAID array - lost all data. I did have a back up to > restore most of the data. I don't think anything is immune to failure. Another fun case is a randomly-bad memory bit causing different things to be written to software raid mirrors. I had one that took 3+ days of running memtest86 to catch. -- Les Mikesell lesmikesell at gmail.com