Booting from ZFS RaidZ
Paul Wootton
paul at fletchermoorland.co.uk
Wed May 27 19:55:54 UTC 2009
Doug Rabson wrote:
>
> On 27 May 2009, at 16:38, Paul Wootton wrote:
>
>> Hi,
>>
>> With the recent changes allowing RaidZ boot, I thought I would
>> finally drop my mirror pack and go RaidZ.
>>
>> The only problem I now have is
>> demophon# zpool set bootfs=DemoPool/root DemoPool
>> cannot set property for 'DemoPool': operation not supported on this
>> type of pool
>>
>> Is this still a work in progress, or do I have something a-miss?
>>
>> I am using current as of today
>> "demophon# uname -a
>> FreeBSD demophon 8.0-CURRENT FreeBSD 8.0-CURRENT #17: Wed May 27
>> 13:18:06 BST 2009 paul at demophon:/usr/obj/usr/src/sys/DEMOPHON
>> amd64"
>
> This is a limitation which I will remove as soon as I have a little
> time to work on it. Basically, Solaris can only boot from simple
> structures such as mirrors and collections of mirrors. The code
> enforces this by stopping you from setting the bootfs property if the
> pool configuration is too complex for the Solaris boot code. I will
> simply remove this limitation for FreeBSD since we can now boot from
> any pool configuration.
>
> In the meantime, you can still boot if you put your root filesystem
> files in the root of the pool. Not ideal I know but I'll try to fix it
> properly soon.
>
This does seem to work correctly for me as I get a BTX crash (see below)
Verifying DMI Poll Data .............
\
FreeBSD/i386 boot
Default:DemoPool:/boot/kernel/kernel
boot:
|
int=00000000 err=00000000 elf=00010083 eip=00192adf
eax=00192e02a ebx=df5610ed ecx=d485b986 edx=00000000
esi=00000040 edi=000935d0 ebp=0009339c esp=00000000
cs=0008 ds=0010 es=0010 fs-0010 gs=0010 ss=0010
cs:eip=c5 e4 00 66 0f 73 dc 02-ff e4 b8 8d 8d bc f2 2a
e9 ba e6 f4 2a 8a d8 24-df 86 c4 be 00 2b e9 8b
ss:esp=16 e8 00 f0 16 e8 00 f0-c3 e2 00 f0 16 e8 00 f0
16 e8 00 f0 54 ff 00 f0-b8 6e 00 f0 16 e8 00 f0
BTX halted
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