Boot-pool - error in scrub

[yacenty]

Hi,
what can I do now, What should I do now?

Code:

Checking status of zfs pools:
NAME		   SIZE  ALLOC   FREE  CKPOINT  EXPANDSZ   FRAG	CAP  DEDUP  HEALTH  ALTROOT
freenas-boot  14.4G  3.43G  10.9G		-		 -	  -	23%  1.00x  ONLINE  -
vol1			29T  10.2T  18.8T		-		 -	 4%	35%  1.00x  ONLINE  /mnt

  pool: freenas-boot
 state: ONLINE
status: One or more devices has experienced an error resulting in data
		corruption.  Applications may be affected.
action: Restore the file in question if possible.  Otherwise restore the
		entire pool from backup.
   see: http://illumos.org/msg/ZFS-8000-8A
  scan: scrub repaired 0 in 0 days 00:09:36 with 1 errors on Thu Oct 11 03:54:36 2018
config:

		NAME		STATE	 READ WRITE CKSUM
		freenas-boot  ONLINE	   0	 0	 1
		  da4p2	 ONLINE	   0	 0	 2

errors: 1 data errors, use '-v' for a list

-- End of daily output --

Boot is located on one usb drive, the server is about 3 months old.

 

[pro lamer]

You can start with identifying the file

use '-v'

to learn if your problems are typical or not...

Sent from my mobile phone

 

[danb35]

Download your config file, do a clean install to a new device, upload your config. If you want it to last longer, install to a small-ish SSD rather than another USB stick.

 

[yacenty]

i have two possible drives: intel s4500 - 480gb or samsung evo850 256 - which one would be better? Intel wouldn't be to expensive for this purpose?
or some old classic HDD which already exchanged to ssd

 

[pro lamer]

Both the SSDs are big as for the boot drive unless you plan heavy writes there. Heavy writes mean wear leveling might use some of the sectors not used by data.

Heavy use of boot drive may occur when system dataset is there. System dataset is on the boot drive when all data pools are encrypted. Correct me if I am wrong.

I am not educated with HDDs for boot drives. At least one uses them but can't recall who and if mirrored.

Sent from my mobile phone

 

[danb35]

At least one uses them but can't recall who and if mirrored.

@Chris Moore. And yes, they're mirrored.

 

[HoneyBadger]

I also use small HDDs for boot pools occasionally - way faster than USB and they're dirt cheap (free, if you just upgraded a bunch of laptops to SSDs!) but mirrors for reliability is encouraged if you're repurposing old hardware.

If you use a non-USB device for boot, you can also relocate swap to your boot drive using this resource:

https://forums.freenas.org/index.php?resources/how-to-relocate-swap-to-the-boot-drive.69/

Although with 11.1 using mirrored swap by default, there's less reason to do so.

 

[yacenty]

I've just bought samsung evo 860 250 - the smallest one in local computer shop.
Is it safe to safe config file, reinstall system on new ssd and import old configuration?
Mirroring system drive is not possible for me at this point - all possible sata ports are occupied.
6 on MB and 4 on external controller

 

[pro lamer]

Is it safe to safe config file, reinstall system on new ssd and import old configuration?

I'd trust this:

Download your config file, do a clean install to a new device, upload your config.

If you want a paranoid-style approach you can check what files are damaged to make sure they were not files storing the config. But this is rather a guess...

Sent from my mobile phone

 

[yacenty]

after the whole operation I have issue with pools

there is new drive called ada1: S3YJNF0JC73420J
Previously I had only ada to 4, but now there is ada to 5

is there any way to fix it?

 

[Redcoat]

What do you want to fix? That's your (new) boot drive.

 

[yacenty]

I know that this is new drive for boot, but how to fix pool vol1?
How to rearange the id for disks?

 

[pro lamer]

How to rearange the id for disks?

What for? EDIT: I doubt it would help...

Usually these names may change and one should not rely on them.

Pools are usually built using gptids and it's done somewhat automatically...

So some other way of fixing is needed...

Sent from my mobile phone

 

[yacenty]

Now I have no access to my data vol1 is not accessible

 

[pro lamer]

I doubt rearranging would help. Some other way should be checked first. Maybe someone more experienced will chime in...

Sent from my mobile phone

 

[Redcoat]

How to rearange the id for disks?

You can't - that naming is assigned by the system.

 

[pro lamer]

Update: you can start with posting results of zpool status command in code tags.

Sent from my mobile phone

 

[yacenty]

 

[yacenty]

You can't - that naming is assigned by the system.

is it possible to add disks to pool once more and to not lost data in the disks/pool? I do not know how to call this operation - reindex/restart the pool?
Reseting cables on the mainboard can help?

 

[danb35]

is it possible to add disks to pool once more and to not lost data in the disks/pool?

Yes, under certain circumstances. The manual will tell you more.

As to your problem importing the pool, it seems strange. What's the output of zpool import?