slow ZFS on FreeBSD 8.1

Dan Langille dan at
Thu Dec 30 00:56:49 UTC 2010

On 12/29/2010 12:47 PM, Matthew Seaman wrote:
> On 29/12/2010 08:57, Freek van Hemert wrote:
>> The hacks sounds good until 8.2 is released however, regarding this upgrade,
>> is the on-disk format the same? Can I just add the pool to a new install (of
>> 8.2-RC) and expect higher performance? Or do I need to recreate the pool
>> with the newer versions of the utilities?
> No -- the on-disk format is different.  ZFS will run fine with the older
> on-disk formats, but you won't get the full benefits without updating
> them.   You'll need to run both 'zpool update -a' and 'zfs update -a' --
> this is a non-reversible step, so be certain you will never need to
> downgrade before doing it.  Also, you *will* need to update gptzfsboot
> on your drives, or you will come to a sticky end if you try and reboot.
>   Something like this:
>     # gpart bootcode -b /boot/pmbr -p /boot/gptzfsboot -i 1 ad0
> 	Cheers,
> 	Matthew

This part applies only if you're booting from ZFS drives?

Dan Langille -

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