Alec Muffett wrote:
As I understand matters, from my notes to design the "perfect" home NAS
server :-)
1) you want to give ZFS entire spindles if at all possible; that will
mean it can enable and utilise the drive's hardware write cache
properly, leading to a performance boost. You want to do this if you
can. Alas it knocks out the "split all disks into 7 & 493Gb partitions"
design concept.
If you know that a disk has no consumers that require the write cache to be
off (eg, UFS), then you can safely manually enable the write cache. ZFS
always issues the cache flush command.
So you could partition a (or several) disks into 1GB swap + 7GB boot zpool +
492GB data zpool, and then safely manually enable the write cache (with
format -e, I believe).
Just beware, do not enable the write cache if you have UFS partitions on the
disk!
--matt
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