I/O Error on Import

[BTJ]

After a power outage, my volume won't import on boot.
I had to use a fresh install just to get it to boot to the GUI. When I re-import my old config, it stops mid-boot to a DB> prompt.

zpool import

Code:

	id: 12881666984181511294
  state: ONLINE
 status: The pool was last accessed by another system.
 action: The pool can be imported using its name or numeric identifier and
	the '-f' flag.
   see: http://illumos.org/msg/ZFS-8000-EY
 config:

	Volume1										 ONLINE
	  raidz1-0									  ONLINE
		gptid/2c768e52-0c28-11e7-94d3-3085a9ee45b4  ONLINE
		gptid/a3fe838c-3f34-11e7-a2d9-3085a9ee45b4  ONLINE
		gptid/1ae02e97-c0e4-11e6-a3e2-3085a9ee45b4  ONLINE
		gptid/4cff6522-067b-11e7-94d3-3085a9ee45b4  ONLINE
		gptid/0ef523f5-ea8e-11e6-9baa-3085a9ee45b4  ONLINE

zpool import Volume1

Code:

cannot import 'Volume1': pool may be in use from other system, it was last accessed by  (hostid: 0x5dabc964) on Fri Aug 17 07:00:16 2018
use '-f' to import anyway

zpool import -f Volume1 and zpool import -F -f Volume1
Starts importing, hits an error and reboots. I see a "restart on panic" in the log during boot.

zpool status

Code:

  pool: freenas-boot
 state: ONLINE
  scan: none requested
config:

	NAME		STATE	 READ WRITE CKSUM
	freenas-boot  ONLINE	   0	 0	 0
	  da0p2	 ONLINE	   0	 0	 0

errors: No known data errors

camcontrol devlist

Code:

<ST10000VN0004-1ZD101 SC60>		at scbus0 target 0 lun 0 (pass0,ada0)
<ST10000VN0004-1ZD101 SC60>		at scbus1 target 0 lun 0 (pass1,ada1)
<ST10000VN0004-1ZD101 SC60>		at scbus2 target 0 lun 0 (pass2,ada2)
<ST10000VN0004-1ZD101 SC60>		at scbus3 target 0 lun 0 (pass3,ada3)
<ST10000VN0004-1ZD101 SC60>		at scbus4 target 0 lun 0 (pass4,ada4)
<SanDisk Cruzer Fit 1.27>		  at scbus6 target 0 lun 0 (pass5,da0)

I'm not sure what to try next. I would appreciate any help.

 

[DrKK]

I don't know what to tell you sir. Evidently, you did not have a UPS backing up the system, so presumably the power outage hit you mid-transaction on your pool, or perhaps concomitant with the outage was a voltage spike. I'll socialize your post around to a few other guys and see if some advanced voodoo can help---you may have to roll-back transactions or something.

@m0nkey_ @Ericloewe @kdragon75

You may also consider coming into the irc channel (#freenas on freenode) for live assistance.

 

[Ericloewe]

One thing you can try is to try and import it with 11.2-Beta2, which has numerous improvements to imports of dodgy pools, compared to 11.1.

 

[DrKK]

One thing you can try is to try and import it with 11.2-Beta2, which has numerous improvements to imports of dodgy pools, compared to 11.1.

Interesting. Did not know. Wherein does the improvement lie? In the FreeBSD codebase, or something we've done?

 

[Ericloewe]

It's upstream ZFS code pulled into FreeBSD before Beta1 was released, IIRC. Several situations that would cause panics now behave better. One extreme is that a pool missing a vdev can be imported read-only since metadata has copies=2 or =3. Any regular data with copies =2 or =3 set will also be readable. It was on BSDnow some time ago.

 

[BTJ]

I've updated to 11.2-BETA2 (no config import), and I've only tried importing my Volume1 via the GUI. Below is a screenshot of the results. This looks like the same error when I fresh installed 9.10.2 and imported my backup-config.db.

I figured I'd wait for a reply before running other cli commands I'm not familiar with.

 

[Ericloewe]

blkptr at ADDR has invalid checksum 0

This should have been quickly solved by rolling back a few transactions. What's the output of zpool import -F -f -n poolname? Don't forget the -n, or you'll have to wait a few minutes...

 

[BTJ]

I get the same output as in the screenshot above in my last post. I had to boot into Single Mode, which I assume is fine, due to it now always trying to import the volume on startup. On the screen during startup, I did notice it said it can't find "Volume1", and on the import, it tries to import by the volume Id.

Side question, should I be trying to import my old config, then trying to import? Or is importing a volume on a fresh install, manually doing what the config would had done for me? Namely because, my config is from a 9.10.2 build, and I'm not sure if it's OK to import that into an 11.x build.

 

[Ericloewe]

It panics with. -n? That's nasty. I'm not sure the pool can be trusted.