>The performance issue of using a drive to multiple unrelated
>consumers (ZFS & UFS)  is that,  if  both are active  at the
>same  time, this  will   defeat  the I/O  scheduling  smarts
>implemented in ZFS. Rather than  have data streaming to some
>physical  location of the rust,   the competition of UFS for
>I/O will cause extra head movement.


Solaris still makes sure that blocks are sorted, whether they
come from UFS or from ZFS.

Casper

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