As you can see in later instalments of this thread, I did the following,
which worked;
reboot, catch on the way up to modify BIOS. (Not as easy as you might
think: my KVM and my notebook wouldn't cooperate until I connected a
different, USB, keyboard AND reconfigured the KVM end concerning what to
present to the console. Probably the fact that it's a German KVM, from
very early in the development of KVM over IP, means it's not as
efficient as a more recent variant would be. .)
Set AHCI w/o legacy mode for SATA.
(and check on every other minor mistake you might have made in BIOS
while you're there)
zpool import -f -R /mnt -N rpool
zpool export rpool
I suppose an extra zpool export rpool would've done away with the need
to have the -force be with me.
Worked like a charm, and the server is faster for everything that needs
interrupts, and the SATA i/f obviously uses the disk in a better way,
too. Lots of little crawley hangs have disappeared, in spite of zfs
filling up memory as always.
The funny bit is it was staring me in the face ( eg the disk device
names.... :-) ) all the time and the performance was getting impossible
but I didn't realise it for many years.
On 2013-03-20 07:08, Ian Collins wrote:
Hans J. Albertsson wrote:
i think I've just got a problem because of machine age!
if I can muster enough courage .... ok, well, being retired, what can
harm me now?
I have my sata controllers in that machine in ide mode... gaah..
<snip>
Will I have to export/backup the entire thing to another disk, and
reconfigure and import/recv/something back, or can I just change the
SATA mode and recreate the devices and dev trees from a live cd w/o
loosing the rpool?
You should be able to export the pool, reconfigure the controller and
then re-import the pool.
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