On Mon, May 5, 2014 at 3:50 PM, Richard Pieri <[email protected]> wrote: >... > Repeat after me: redundant disks do not provide data integrity. > > Redundant disks -- be they rotating platters or flash chips -- will keep > the system running if one fails but they won't protect your data from > corruption or loss.
The way I think of loss; hardware redundancy can protect you against data loss due to failures which occur in the redundant hardware. What it can't do is protect you against is loss due to software or operational errors. Any hardware that isn't redundant can cause corruption, but proper use of redundant hardware (appropriate RAID levels) can protect against corruption caused by those devices. I believe that some specialized hardware allow a checksum to be generated in the system and checked/stored on the storage device in such a way as to protect against data path errors. (A bit like ZFS can do, but with hardware assistance.) Bill Bogstad _______________________________________________ Discuss mailing list [email protected] http://lists.blu.org/mailman/listinfo/discuss
