[OpenIndiana-discuss] What to do with 4k sector SATA drives... All fixes are for SCSI drives only!!??

[Hans J. Albertsson]

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.
>