[OpenIndiana-discuss] How do I swiych from IDE to AHCI mode for my SATA disks, please vet my procedure!

[Pablo Oddera]

When i did it (and it was long ago), i just changed the
mode on the motherboard. Nothing else. The existing pools worked out of the
box. Also it change back (bios reset) and it still work on a IDE mode but
throwing a lot of errors on the logs. Then change it back and everything
come back to normal.


On Mon, Mar 18, 2013 at 2:14 PM, Hans J. Albertsson <
hans.j.albertsson at branneriet.se> wrote:

>
> Status: I have a server with two SATA disks carrying a root pool 2 way
> mirror.
>
> The motherboard is in IDE mode for SATA.
>
> This must now change, since I need to be able to accomodate disks of the
> 512e ilk, i e disks that lie about their blocksize, which really is 4k.
>
> I think I should do the following:
>
> On the running host, I make sure either disk can be booted, by doing the
> installgrub things.
>
> Then I reboot the machine on a live DVD. On the way up, I set the Bios to
> use AHCI mode for the SATA disks, and boot the Live DVD.
>
> From the live cd I do, I hope this is correct! Please vet!
>
>
> -------
> zpool import -f rpool
>
> ( The -f is because I didn't export it on the running system, because I
> couldn't, but I know it isn't active, I'm running off a DVD, see. But how
> does "zpool" find rpool???)
>
> touch /a
>
> zfs set -o canmount=on,mountpoint=/a root/ROOT/OI-151a7
>
> zfs mount rpool/ROOT/OI-151a7
>
> devfsadm -r /a -Cv
>
> bootadm update-archive -R /a
>
> zpool export rpool
>
> reboot
> --------
>
>
>
> After the reboot, if everything is OK I'm fine, but what can I do to
> recover in IDE mode if all this breaks for some dumb mistake or error??
>
> I'd like to ensure that disk number two remains unchanged until I know
> AHCI mode works, so that I can either attach and resilver disk 2 if all is
> OK or else reboot the Live DVD and recreate the IDE rpool from disk  2.
>
> An alternative to devfsadm would be to erase the dev and devices trees
> embedded in the rpool and copy the Live DVD /dev and /devices in.
>
> And I suppose a new installgrub would have to be performed somewhere after
> the dev/devices revamp and and before the bootadm
>
>
>
>
>
>
>
>
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