Help booting FreeBSD with a ZFS root filesystem

[krad]

2010/1/26 krad <kraduk at googlemail.com>

>
>
> 2010/1/26 Steve Bertrand <steve at ibctech.ca>
>
> krad wrote:
>> > 2010/1/26 Ross Penner <ross.penner at gmail.com>
>> >
>> >> That seems to have been the problem.
>> >>
>> >> Thanks for the help.
>> >>
>> >> On Mon, Jan 25, 2010 at 5:29 PM, George Liaskos <geo.liaskos at gmail.com
>> >
>> >> wrote:
>> >>> I had the same issue because i forgot to copy the zpool.cache under
>> >>> /zroot/boot/zfs.
>>
>> > once you have generated the zpool.cache never never never export the
>> boot
>> > pool again. Exporting isnt the same as unmounting (a common
>> misconception).
>> > If you do export it the pool will become unbootable.
>>
>> Out of curiosity (because I had this problem a few weeks back), how does
>> one move a bootable pool into another physical server in order to be
>> able to see the pool as a 'data' set without exporting/importing, and
>> then moving the pool back to the hardware that it normally boots from?
>>
>> Perhaps I was lucky when copying the cache back onto itself worked...
>>
>> Steve
>>
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> with difficulty i suspect. You will probably have to specify an alternate
> root and zpool.cache file. Then copy the cache file onto the zpool before
> powering down, and NOT exporting.
>
> If you don't use an alternate zpool.cache file I suspect you will get
> issues as the test systems zpools will be referenced in there, and will
> cause a pickle when you bring the broken system up.
>
> Its probably best to use a non zfs based rescue system just to keep things
> simpler.
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Not sure if there will be any issues with hostid being different. I presume
the pool is imported with a -f option on boot