Pool Became Offline After Reboot, Disks Not Showing

[robthelampy]

Hi All,

I have a HP Proliant running hardware RAID 5 for my pool, plan was to move all data to another system for backup today.

After reboot all disks testing ok in HP configuration but pool is offline and no disks showing, I tried to remove pool and re import it but I received this message

Error: concurrent.futures.process._RemoteTraceback:
"""
Traceback (most recent call last):
File "/usr/local/lib/python3.9/concurrent/futures/process.py", line 243, in _process_worker
r = call_item.fn(*call_item.args, **call_item.kwargs)
File "/usr/local/lib/python3.9/site-packages/middlewared/worker.py", line 111, in main_worker
res = MIDDLEWARE._run(*call_args)
File "/usr/local/lib/python3.9/site-packages/middlewared/worker.py", line 45, in _run
return self._call(name, serviceobj, methodobj, args, job=job)
File "/usr/local/lib/python3.9/site-packages/middlewared/worker.py", line 39, in _call
return methodobj(*params)
File "/usr/local/lib/python3.9/site-packages/middlewared/worker.py", line 39, in _call
return methodobj(*params)
File "/usr/local/lib/python3.9/site-packages/middlewared/schema.py", line 979, in nf
return f(*args, **kwargs)
File "/usr/local/lib/python3.9/site-packages/middlewared/plugins/zfs.py", line 371, in import_pool
self.logger.error(
File "libzfs.pyx", line 391, in libzfs.ZFS.__exit__
File "/usr/local/lib/python3.9/site-packages/middlewared/plugins/zfs.py", line 365, in import_pool
zfs.import_pool(found, new_name or found.name, options, any_host=any_host)
File "libzfs.pyx", line 1095, in libzfs.ZFS.import_pool
File "libzfs.pyx", line 1123, in libzfs.ZFS.__import_pool
libzfs.ZFSException: I/O error
"""

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
File "/usr/local/lib/python3.9/site-packages/middlewared/job.py", line 367, in run
await self.future
File "/usr/local/lib/python3.9/site-packages/middlewared/job.py", line 403, in __run_body
rv = await self.method(*([self] + args))
File "/usr/local/lib/python3.9/site-packages/middlewared/schema.py", line 975, in nf
return await f(*args, **kwargs)
File "/usr/local/lib/python3.9/site-packages/middlewared/plugins/pool.py", line 1421, in import_pool
await self.middleware.call('zfs.pool.import_pool', pool['guid'], {
File "/usr/local/lib/python3.9/site-packages/middlewared/main.py", line 1256, in call
return await self._call(
File "/usr/local/lib/python3.9/site-packages/middlewared/main.py", line 1221, in _call
return await self._call_worker(name, *prepared_call.args)
File "/usr/local/lib/python3.9/site-packages/middlewared/main.py", line 1227, in _call_worker
return await self.run_in_proc(main_worker, name, args, job)
File "/usr/local/lib/python3.9/site-packages/middlewared/main.py", line 1154, in run_in_proc
return await self.run_in_executor(self.__procpool, method, *args, **kwargs)
File "/usr/local/lib/python3.9/site-packages/middlewared/main.py", line 1128, in run_in_executor
return await loop.run_in_executor(pool, functools.partial(method, *args, **kwargs))
libzfs.ZFSException: ('I/O error',)

Any Help is appreciated, there are some important files I need off of here