I'm running a couple of 4TB in mine for some time w/o problems and I
think I saw larger are possible in the posts. You could search at the
google groups url given in the signature.
https://groups.google.com/group/alt-f
For economy, I bought the WD Purple and it has been working fine.
Rolf
[root@DNS-323]# smartctl -i /dev/sda
smartctl 6.4 2015-06-04 r4109 [armv5tel-linux-3.18.28] (local build)
Copyright (C) 2002-15, Bruce Allen, Christian Franke,
www.smartmontools.org
=== START OF INFORMATION SECTION ===
Model Family: Western Digital Purple
Device Model: WDC WD40PURX-64GVNY0
Serial Number: WD-WCC4E2JA3CY3
LU WWN Device Id: 5 0014ee 261304241
Firmware Version: 80.00A80
User Capacity: 4,000,787,030,016 bytes [4.00 TB]
Sector Sizes: 512 bytes logical, 4096 bytes physical
Rotation Rate: 5400 rpm
Device is: In smartctl database [for details use: -P show]
ATA Version is: ACS-2 (minor revision not indicated)
SATA Version is: SATA 3.0, 6.0 Gb/s (current: 3.0 Gb/s)
Local Time is: Mon Apr 16 16:44:47 2018 PDT
SMART support is: Available - device has SMART capability.
SMART support is: Enabled
[root@DNS-323]# smartctl -i /dev/sdb
smartctl 6.4 2015-06-04 r4109 [armv5tel-linux-3.18.28] (local build)
Copyright (C) 2002-15, Bruce Allen, Christian Franke,
www.smartmontools.org
=== START OF INFORMATION SECTION ===
Model Family: Western Digital Green
Device Model: WDC WD40EZRX-00SPEB0
Serial Number: WD-WCC4E0386022
LU WWN Device Id: 5 0014ee 25e90b971
Firmware Version: 80.00A80
User Capacity: 4,000,787,030,016 bytes [4.00 TB]
Sector Sizes: 512 bytes logical, 4096 bytes physical
Rotation Rate: 5400 rpm
Device is: In smartctl database [for details use: -P show]
ATA Version is: ACS-2 (minor revision not indicated)
SATA Version is: SATA 3.0, 6.0 Gb/s (current: 3.0 Gb/s)
Local Time is: Mon Apr 16 16:45:16 2018 PDT
SMART support is: Available - device has SMART capability.
SMART support is: Enabled
[root@DNS-323]#