JorgeB

Formatted with type 2 protection  
You need to remove this from the disks, more info below.
 
https://forums.unraid.net/topic/93432-parity-disk-read-errors/?do=findComment&comment=864078

https://forums.unraid.net/topic/110835-help-with-a-sas-drive/

Sep 13 15:24:39 Proliant-2 kernel: be2net 0000:0d:00.0 eth4: Link is Down Sep 13 15:24:39 Proliant-2 kernel: be2net 0000:0d:00.1 eth5: Link is Up  
Log does show link up on one of the ports, note that you should set it as eth0 (Settings -> Network Settings -> Interface Rules then reboot) if you want to use that NIC as the main one to manage Unraid.

Strange error, please try this:
 
Unassign all cache devices, start array to make Unraid "forget" current cache config, stop array, reassign all cache devices (there can't be an "All existing data on this device will be OVERWRITTEN when array is Started" warning for any cache device), start array, post new diags if it still doesn't mount.
 
 

Still nothing, and the other Intel NIC is now also missing, upgrade to v6.10.3 since there were changes to the NIC rules script and post new diags, might also be a good idea to delete/rename network.cfg to use the default LAN settings.

Sep 9 15:01:30 Tower emhttpd: /mnt/cache ERROR: cannot scan /dev/sdf1: Input/output error This is the problem, sdf is parity and because you have an odd number of btrfs arrays devices makes it look like parity has an invalid btrfs filesystem and causes issues during btrfs device scan, it's a known issue but there's no fix for now, workaround is to use xfs only for the array, use btrfs encrypted, or have an even number of btrfs array devices, this last option usually works but not always.

Check/replace cables on disk7, both power and SATA to see if those ATA errors go away, disk looks OK.

Unassign both pool devices, start array, stop array, reassign both pool devices, start array, that should do it.

Docker image is corrupt, delete and recreate.

If Docker/VM services are using the cache pool disable them, unassign all cache devices, start array to make Unraid "forget" current cache config, stop array, reassign all cache devices (there can't be an "All existing data on this device will be OVERWRITTEN when array is Started" warning for any cache device), re-enable Docker/VMs if needed, start array.

Currently only the WD SSD is in the pool, stop the array, unassign the Samsung NVMe, start array, stop array, re-assign the Samsung NVMe, start array and that should fix it, in doubt post new diags.

BTRFS error (device nvme0n1p1): block=2530556395520 write time tree block corruption detected This is usually a sign of bad RAM, there was also some data corruption found before, so start by running memtest.

I believe stopping and re-starting the array will clear that, if not reboot, note that those are disk errors, not sync errors, that's why they remain, if you want us to take a look at why caused them post the diagnostics before rebooting.

Was this with Firefox? If yes it's a known issue, try a different browser.

Aug 26 12:18:49 BlackIce kernel: macvlan_broadcast+0x10e/0x13c [macvlan] Aug 26 12:18:49 BlackIce kernel: macvlan_process_broadcast+0xf8/0x143 [macvlan]  
Macvlan call traces are usually the result of having dockers with a custom IP address and will end up crashing the server, upgrading to v6.10 and switching to ipvlan should fix it (Settings -> Docker Settings -> Docker custom network type -> ipvlan (advanced view must be enabled, top right)).

For now you can do this:
 
https://forums.unraid.net/topic/127955-error-on-reboot/?do=findComment&comment=1165935
 

Blacklist the GPU driver from loading to see if it makes a difference, you can find the instructions for example here.

Run it again without -n or nothing will be done, if it asks for it use -L.

At what position is the check? Disk 4 is showing one or more slow zones in the beginning.

In the syslog it's log as the disk problem, but since the SMART test passed you can rebuild on top, make sure the emulated disk is still mounting before doing it, also a good idea to swap/replace cables before to rule them out if it happens again to the same disk.
 
There are also what look like connection issues with both cache devices, though strange that it's with both, unless they share a power splitter or something.

El disco se puede identificar por el número de serie.

It is, if you used it before it's now using the fist 15 day extension. 

Yes, and that's from the UD plugin, not Unraid.

Some strange crashing going on that might be affecting that, please reboot it the disks still don't mount post new diags.

Aug 30 04:40:02 Tower kernel: FAT-fs (sda1): Directory bread(block 537257) failed Aug 30 04:40:02 Tower kernel: FAT-fs (sda1): Directory bread(block 537258) failed Aug 30 04:40:02 Tower kernel: FAT-fs (sda1): Directory bread(block 537259) failed Aug 30 04:40:02 Tower kernel: FAT-fs (sda1): Directory bread(block 537260) failed Aug 30 04:40:02 Tower kernel: FAT-fs (sda1): Directory bread(block 537261) failed  
Flash drive problems, you can try backup and reformatting it, also make sure it's using a USB 2.0 port, if issues continue replace it.

Try updating to v6.11.0-rc4, if that doesn't help and IIRC a user with a similar error KVM error fixed it by creating as new identical VM, i.e., it was something in that specif VM.