[OpenIndiana-discuss] [Solved] Re: help needed: reinstall bootloader

[Stephan Althaus]

Hello!

Many thanks for the hints!

This worked:
#boot from installation media
#sudo zpool import rpool
#sudo zpool export rpool
#reboot

Note: i didn't have to specify -d /dev/dsk or the like, the device name 
was automatically changed.

Over night i had an idea which might have solved this without reboot:
-define a partition on a spare drive with the exact same size as the 
rpool partition
-add this new device as a mirror device to the rpool
-wait for resilver complete
-detach the original device
-"some magic" to clear the zpool/zfs info on the original device
-re-add the 'cleaned' original device
-wait for resilver complete
-detach the temporary used device
-done

Any thoughts on this?
if this were a good idea, can someone give the missing command line 
details for the next person who needs this?

Greetings from Germany,
Stephan

On 04/14/18 08:43 AM, Nikola M wrote:
> On 04/13/18 11:27 PM, Till Wegmüller wrote:
>> Hi Stephan
>>
>> Is this a Linux dualboot machine?
>>
>> Linux has the tendency to overwrite the device section of a zpool when
>> importing. /dev/sdc looks like a linux name.
>>
>> If so you may have killed that zpool by importing it from linux.
>> AFAIK there is currently no good solution to fix the device name entry.
>
> Except from, booting from Live media (DVD,USB) , importing pool and 
> exporting pool and reboot?
>
>
>> Also be sure to stick to either slices or partitions p1 != s1 in your
>> commands.
>> One is the traditional Solaris Slice layout of the disk the other the
>> Partitions in DOS style. They do not mix at all.
>
> It means there is a difference if partitions are created under 
> illumos/Solaris and Linux.
> up to 4 'Slices' can fit insite standard(MBR) partition and when 
> creating ZFS partition from OI, it creates one slice inside partition 
> for ZFS.
> And that is not the same as having ZFS on top of partition.
> So it is better to create partition aether during illumos install (and 
> not before install) because of that difference.
>
> I had a problem with reinstalling illumos loader while retaining MBR 
> partition, With ZFS on it without slice on partition.
> Would need to re-check if that works now, but it is always better to 
> create ZFS partition with illumos fdisk or OI Install process.
>
> And also there is the question weather Hard disk cache is turned on if 
> ZFS uses partition and not the whole drive. Previoiusly, Hard disk 
> caching used to be turned OFF if ZFS is on partition and not on the 
> whole drive, for UFS compatibility.
> Don't know how it is now nor how to explicitlycheck/turn ON Hard disk 
> caching if ZFS pool uses partition on drive.
>
>
>
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