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ahhhhh, I see. I saw that the device appeared under Unassigned Devices recently and didn't understand why. The device in question is a 14Tb desktop expansion hdd with only a USB port. When I built my Unraid system, I tried to buy as few new parts as possible. I do have a SATA connected HDD as the main "working drive". Assuming the USB would be worse for data transfer, I assigned the USB device as the parity drive. In my understanding the parity drive is in use less frequently so I thought it would manage. Some degree of my understanding was wrong though. Perhaps the expansion hdd would serve better as a backup instead of a parity device? P.s. since reading your reply, I found several articles online that describe "shucking" desktop hard drives in order to expose their SATA connections. I might look into that too.

Hi all, I noticed today that my parity disk is disabled. I've been doing my best to understand what is happening before posting. It seems the parity disk was disabled on November 7th. I don't think there are any SMART attributes in warning for this device. I see in the system log several disk write errors on November 7th, some of them followed by "attempt to access beyond end of device". I'm presently running a Read-Check on the array. The drive in error is the ST14000NM0121 (sde). I appreciate anyone's time and advice! Uploading Attachment...diagnostics-20251124-1630.zip