[EMAIL PROTECTED] 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.
-- richard
Richard,
This does not seem to be enforced (! 1:1) in code anywhere that I can
see. By not required are you pointing that this is able to be done in the
future, or is this the case right now and I am missing the code that
accomplishes this?
IMHO, the best description of how mirrors work is:
http://blogs.sun.com/bonwick/entry/smokin_mirrors
The ditto block code is interesting, too.
-- richard
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