> > Also, where does this single disk RAID notion come from? This sounds > > actually interesting. Is this a project actually in progress or to be > > considered? Sure, it doesn't prevent data loss on disk failure, however > > may improve the safety of your data a lot without plain out losing half > > your disk space due to simple mirroring. > > http://blogs.sun.com/bill/entry/ditto_blocks_the_amazing_tape > > http://blogs.sun.com/relling/entry/zfs_copies_and_data_protection
Those are ditto blocks, basically mirroring. Under single disk RAID, I understand parity striping on the same physical disk, with a user defined ratio (i.e. one parity stripe for every 3 data stripes). -mg
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