This is a new install - UNRAID 6.5.3.  I have 1 - SSD and 8 - 2 TB drives connected.  UNRAID sees all of the drives but only allows me to assign a parity drive and 3 disks.  The other 4 disks do not show up at all under Main - Array Devices.  When the array is offline, they do not show up in the drop down lists, nor do they show up as unassigned devices.  I have a Server Plus license, show I should be able to assign up to 12 devices.

Edited July 28, 20186 yr by Justin Conger

Tools-Diagnostics,post complete zip 

unraid-diagnostics-20180728-1551.zip

You should avoid using USB devices on the array, unRAID is having troubling getting the IDs for the missing disks, this can happen becuase some USB enclosures add number to the disk identification and they are likely the same as the already detected disks.

 

Quote

Jul 28 13:57:31 Tower emhttpd: HUA72202_0ALA330_152D00539000-0:2 (sdg) 512 3907029168
Jul 28 13:57:31 Tower emhttpd: HUA72202_0ALA330_152D00539000-0:3 (sdh) 512 3907029168
Jul 28 13:57:31 Tower emhttpd: device /dev/sdd problem getting id
Jul 28 13:57:31 Tower emhttpd: HUA72202_0ALA330_152D00539000-0:0 (sde) 512 3907029168
Jul 28 13:57:31 Tower emhttpd: HUA72202_0ALA330_152D00539000-0:1 (sdb) 512 3907029168
Jul 28 13:57:31 Tower emhttpd: device /dev/sdf problem getting id
Jul 28 13:57:31 Tower emhttpd: device /dev/sdc problem getting id
Jul 28 13:57:31 Tower emhttpd: Verbatim_STORE_N_GO_070B56CD175C9210-0:0 (sdi) 512 30233472
Jul 28 13:57:31 Tower emhttpd: device /dev/sda problem getting id