ZPool will not mount, keeps boot cycling FreeNAS 11.3U1

[tylerlaczko]

FreeNAS-11.3-U1
Intel(R) Core(TM) i5-3570K CPU @ 3.40GHz
8GB RAM

I upgraded 11.2 to 11.3 on 2 of my machines and enabled the new spacemap feature for zfs
I have been running a sync task from machine1 to machine2 for a couple years and haven't had an issue.
One of my zpools has an issue and shutdown machine2
It just keeps rebooting
I disconnect the harddrives in the pool and the machine and other pool mounts
I then deleted the pool
shutdown
reconnect the hard drives
boot up fine with the other pool

if I mount as readonly I can view all the data and it works.
if I do a normal mount it will crash the system


I deleted the entire pool and created with the same disks as an empty new pool.
I then resynced from machine1 to machine2 (took 3 days)
This was working for a month
I have the same issue again.

 

[tylerlaczko]

Except this time I cannot mount the pool even in readonly
zpool import -f -o readonly=on DATA
restarts my server

Can I run anything to repair this?

 

[Alecmascot]

If you are booting from a USB stick then change it and do a fresh install, after saving the config. Or use a small SSD.

 

[tylerlaczko]

The OS boots just fine when I delete the pool DATA. all the services and the other pool is fully functional.... i dont see the os being on a usb to be the issue?

 

[tylerlaczko]

I recreated the pool and am syncing again.
not solved.

 

[tylerlaczko]

I recreate the pool
Start to resync
About 1.5 TB was copied
Failed on copying a snapshot
Will not boot again

I have created a backblaze account for temporary storage while I solve why this will not replicate and keeps corrupting my ZFS pool

I have shutdown the server
removed the harddrives in the DATA pool
Restarted the server and it boots
delete the zfs pool DATA
the BAK pool still functions
shutdown the server
reconnect the drives
try to import DATA pool
and it reboots

I can recreate a new pool with the disks and it functions fine.
When I resync my data to the pool it kills the ZFS Pool DATA and does the same thing over again.

What can I check for logs?
Why does it keep corrupting?
I have tried to sync this data on another freenas machine and it corrupted the ZFS pool there too.