Pawel Jakub Dawidek a écrit :
On Wed, May 21, 2008 at 03:00:41PM +0200, Arnaud Houdelette wrote:
I'm playing around with ZFS.
Currently, I just use it for storage, with a zpool of 4 sata disks.
The system and boot disk is still formatted with UFS.
As I'm quite pleased with ZFS features, I'd like to try ZFS on root. The
ZFS wiki is quite clear on how to proceed : if the boot and root are on
the same disk, you'll have to use bsd labels.
The thing is, I read somewhere that ZFS doesn't enable write caching on
drives if not used on whole disks.
This is only the case for Solaris, as it turns off write cache by
default. In FreeBSD we always turn on write cache, so don't worry, it
will just work on FreeBSD.
Thanks for the info.
[...]
3. I'd like to keep the storage pool (zraid1) separated from the system
pool (just one disk). The wiki states that we may encounter problems
with more than one pool in use : is it still the case ?
AFAIK it was never the case. Where did you find that information
exactly? I've two systems that have more than one pool configured and
never had any problems.
It's clearly stated in the ZFS page of the FreeBSD Wiki :
http://wiki.freebsd.org/ZFSKnownProblems , 3rd entry states :
Kernel panic and/or data loss may result when more than one ZPOOL is
active / in use. Symptoms: various, including (unverified) possibility
of data loss. References:
http://lists.freebsd.org/pipermail/freebsd-fs/2008-February/004377.html
I'll try for myself then.
Arnaud Houdelette
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