On Jun 20, 2012, at 4:08 AM, Jim Klimov wrote:
> Also by default if you don't give the whole drive to ZFS, its cache
> may be disabled upon pool import and you may have to reenable it
> manually (if you only actively use this disk for one or more ZFS
> pools - which play with caching nicely).

This is not correct. 
The behaviour is to attempt to enable the disk's write cache if ZFS has the 
whole disk. Relevant code:

Please help us to stop propagating the misinformation that ZFS disables 
write caches.
 -- richard


ZFS and performance consulting

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