On 30-Jan-07, at 5:48 PM, Richard Elling wrote:
...
One of the benefits of ZFS is that not only is head synchronization
not
needed, but also block offsets do not have to be the same. For
example,
in a traditional mirror, block 1 on device 1 is paired with block 1 on
device 2. In ZFS, this 1:1 mapping is not required. I believe
this will
result in ZFS being more resilient to disks with multiple block
failures.
In order for a traditional RAID to implement this, it would basically
need to [re]invent a file system.
Yes, this is another feature for the "Why ZFS can beat RAID" FAQ.
--T
-- richard
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