Mario Goebbels wrote:
Because you have to read the entire stripe (which probably spans all the
disks) to verify the checksum.
Then I have a wrong idea of what a stripe is. I always thought it's the
interleave block size.
Nope. A stripe generally refers to the logical block as spread across
physical devices. For most RAID implementations ("hardware", "firmware",
or software), the interleave size is the stripe width divided by the number
of devices. In ZFS, dynamic striping doesn't have this restriction, which
is how we can dynamically add physical devices to existing stripes. Jeff
Bonwick describes this in the context of RAID-Z at
http://blogs.sun.com/bonwick/entry/raid_z
-- richard
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