Any hope - ZFS import reboots server?

[Milkwerm]

Hi
I have a box that has been running freenas since version 8.0.1 quite happily. unfortunately the last upgrade hasn't panned out well (9.1.1 - 9.2.1) The server started having random reboots within 24 hours of the update. until finally it started to hang on boot. I suspected that the USB stick may have been at fault first and replaced it. Fresh install boots OK. but when the config was re-applied it started throwing the same error on boot. So I reinstalled and went for an Auto import of the disks. The import goes to stage 2 of 2 and does see the volume then about 10 seconds into the import the server just reboots.. no import done.
Memtest++ went all the way with no memory errors (ECC RAM).

The hardware is a Intel whitebox server S5000PAL board with a Xeon E5520 CPU and 12G RAM.
5x 1TB SATA disks in RAIDZ1 array (about 8 months old)
Are there any steps I can take to try and recover what looks like a ZFS issue? (the disks were definitely all OK, before the upgrade at least).

boot error message:
Fatal Trap 12: page fault while in kernel mode
cpuid = 0; apci id = 00
fault virtual address = 0x2b8
fault code = supervisor read data, page not present
instruction pointer = 0x20:0xffffffff018ab9d5
stack pointer = 0x20:0xffffff36c40d6b0
frame pointer = 0x20:0xffffff36c40d6d0
code segment = base 0x0, limit 0xfffff, type 0x1b
= DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags = interrupt enabled, resume, IOPL = 0
current process = 244 (txg_thread_enter)
[ thread pid 244 tid100501 ]
stopped at dva_get_dsize_sync+0x45: imlq 0x2b8(%rax),%rdx
db>


also - from cli:

[root@NAS01] ~# zpool import
pool: RaidZRoot
id: 1912851394633651717
state: ONLINE
status: Some supported features are not enabled on the pool.
action: The pool can be imported using its name or numeric identifier, though
some features will not be available without an explicit 'zpool upgrade'.
config:

RaidZRoot ONLINE
raidz1-0 ONLINE
gptid/b40816ff-dea4-11e2-9500-000e0ce61e52 ONLINE
gptid/b45fbb20-dea4-11e2-9500-000e0ce61e52 ONLINE
gptid/b4b69160-dea4-11e2-9500-000e0ce61e52 ONLINE
gptid/b50d94e7-dea4-11e2-9500-000e0ce61e52 ONLINE
gptid/b5624e14-dea4-11e2-9500-000e0ce61e52 ONLINE

 

[Al_ex]

Hello.
I have problem like it's. But I use FreeNAS-9.2.0.

Memtest++ went all the way with no memory errors.

The hardware is a Intel whitebox server S5000VSA board with a Xeon CPU and 16G RAM.
4x 1TB SATA disks in RAIDZ2 array.

 

[dlavigne]

Did you ever figure this out?

 

[Milkwerm]

turned out the zpool was corrupt. I managed to mount it read only and copy all the data off it to a second server.
I think the spontaneous reboots (some other cause) did it in.