Matthias Urlichs wrote:
On Fri, 31 Jul 2009 14:09:06 -0500, Jon Nelson wrote:
The bitmap never gets cleared unless all disks in the array are in
sync.
Well, that sucks. What is the reasoning behind that?
There's only one bitmap per device. If the bits get cleaned writing to
disk #2, then the system would forget that they still need to be written
to disk #3.
Right, and that decision was made for efficiency and simplicity of
design. Having a bitmap per pair of component disks would be inefficient
and very complicated. You could stack raid1's if you absolutely had to
have that type of functionality.
--
Paul
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