The disk itself might generate errors if it gets very hot, but Unraid never disables a disk because it's hot, that's not possible, it only disables a disk if there are write errors.
If the disk mounts it should show the data, if there was serious filesystem corruption it wouldn't mount, but you can still run xfs_repair, if the disk is unassigned it would be:
xfs_repair -v /dev/sdX1
Replace X with correct letter.