GPT boot with ZFS RAIDZ "ZFS: i/o error - all block copies unavailable"

[Radek Valášek]

Robert Noland napsal(a):
> On Mon, 2009-10-26 at 10:23 +0100, Merijn Verstraaten wrote:
>   
>> On Mon, 26 Oct 2009 01:31:46 +0100, Robert Noland <rnoland at freebsd.org>  
>> wrote:
>>     
>>>> After installing 8.0-RC1 (amd64) from USB stick this installation works
>>>> fine. If I csup to RELENG_8 (amd64) and compile + install world and  
>>>> kernel
>>>> booting from the ZFS fails. The initial installation I did just this, on
>>>> another attempt I ran "gpart bootcode -b /boot/pbmr -p /boot/gptzfsboot
>>>> adX" on all disks before rebooting to see if that had any effect. The  
>>>> end
>>>> result is the same. After rebooting the machine I get the following
>>>> prompt(s):
>>>>
>>>>          ZFS: i/o error - all block copies unavailable
>>>>          Invalid format
>>>>
>>>>          FreeBSD/i386 boot
>>>>          Default: tank:/boot/kernel/kernel
>>>>          boot:
>>>>         
>>> Could you type "status" at this point and tell what it shows?
>>>       
>> If I type status at this point I get:
>>
>>    pool: tank
>>    config:
>>        NAME    STATE
>>        tank   ONLINE
>>      raidz1   ONLINE
>>       ad4p3   ONLINE
>>       ad6p3   ONLINE
>>       ad8p3   ONLINE
>>      ad10p3   ONLINE
>>
>> Which seems odd, since that's all the drives there are. So if it finds  
>> these it's already found all drives. My optimistic "Oh! I'll try and boot  
>> again" spirit was however crushed since it just results in the same error.
>>     
>
> Ok, that is both good and frustrating... I haven't produced any boot
> failures with all of the drives visible.  Do, note that I just added
> support for reading gang blocks to the loader. (basically untested,
> since I haven't managed to create them at will)  You will need to update
> your partition boot code for it to be supported during early boot.  i.e.
> gpart bootcode -p /boot/gptzfsboot -i <boot partition> <disk>
>
> The "all block copies unavailable" is a frustrating error, since all it
> means is a failed read, but we don't get a clue what failed or why.
> With the code that is in -CURRENT it will report gang blocks if found,
> even if it fails to read them.
>  
> robert.
>   
So I switched to -CURRENT:

1, overwriting /boot/loader.conf results with:

BTX loader 1.00 BTX version is 1.02
Consoles: internal video/keyboard
BIOS drive C: is disk0
BIOS drive D: is disk1
BIOS drive E: is disk2
BIOS drive F: is disk3
BIOS 627kB/3405248kB available memory

FreeBSD/i386 bootstrap loader, Revision 1.1
(root at ztest, Mon Oct 26 14:01:44 CEST 2009)
Loading /boot/defaults/loader.conf
ZFS: i/o error - all block copies unavailable
Warning: error reading file /boot/loader.conf

so basically the same as in RELENG_8

2, + overwriting /boot/loader results with:

ZFS: i/o error - all block copies unavailable
Invalid format

FreeBSD/i386 boot
Default: z:/boot/kernel/kernel
boot:
\
int=00000001  err=00000000  efl=00000087 eip=0018d27d
eax=0018d2af  ebx=18bf9925  ecx=540d8ef2  edx=00000000
esi=00009401  edi=000919d0  ebp=36571125  esp=80000000
cs=0008  ds=0010  es=0010  fs=0010  gs=0010  ss=0010
cs:eip=1f 68 e2 c6 7d 75 0c 5d-45 58 c7 80 f5 99 bd 9e
       fe 68 2d 3e 3c 35 5e 67-61 12 fe 50 c9 0b e4 70
ss:esp=00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00
       00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00
BTX halted

3, I also try the 'status' as you told to Merijn before BTX halted:

ZFS: i/o error - all block copies unavailable
Invalid format

FreeBSD/i386 boot
Default: z:/boot/kernel/kernel
boot: status  pool: z
config:
NAME  STATE
z  ONLINE
raidz1  ONLINE
ad6p2  ONLINE
ad8p2  ONLINE
ad10p2  ONLINE
ad12p2  ONLINE

radek.

>  
>   
>> Kind regards,
>> Merijn
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