NAS Drive Compatibility

WD Ultrastar DC HA340 12 TB

Enterprise HDD

Part number WUS721212BLE6L4 · Ultrastar DC HA340 series · 3.5'' SATA HDD. If your machine is listed below, this drive is officially supported — not a forum workaround.

Ultrastar DCHA340NAS HARD DRIVE3.5" SATA HDDWD

Part of the WD Ultrastar DC HA340 series →

Check WUS721212BLE6L4 price on Amazon  partner link

13
Compatible NAS models
0 Syn · 0 QNAP · 13 Asus · 0 TM
By vendor
12 TB
Listed capacity
WD
Manufacturer
3-2-1 cold backup fit

No series-level recording rating is on file for this part number yet — check the exact model for CMR vs SMR before buying it as a large cold copy (SMR is the one trait that makes a 16 TB+ backup copy painfully slow). The 3-2-1 guide and the backup tools encyclopedia cover what to schedule it with.

Compatibility verdict

It appears on the official compatibility lists of 13 machines and series — 13 Asustor. This is a Enterprise-class drive: rated for heavier sustained workloads than desktop drives. It is a strong pick for a NAS running 24/7, large-array rebuilds or camera workloads, and enterprise lines are also the drives most widely listed across all five vendors' HCLs. No series-level recording rating is on file for this part number yet, so check CMR vs SMR on the exact model before buying for an array.

Compatible NAS models

Asustor AS 33 See its full HCL → Asustor AS 33 v2 See its full HCL → Asustor AS 52/53 See its full HCL → Asustor AS 54 See its full HCL → Asustor AS 65 See its full HCL → Asustor AS 65R See its full HCL → Asustor AS 66 See its full HCL → Asustor AS 67 See its full HCL → Asustor AS 68 See its full HCL → Asustor AS 71 See its full HCL → Asustor AS 71R See its full HCL → Asustor AS 72R See its full HCL → Asustor AS5004U See its full HCL →

Same-capacity alternatives

Other drives listed at 12 TB capacity, ranked by how many machines list them:

Western Digital WD121KRYZ 381 machines · Gold Toshiba MG07ACA12TE 329 machines · MG07ACA*** Seagate ST12000NM0008 315 machines · Exos X14 Seagate ST12000NE0007 311 machines · IronWolf Pro Seagate ST12000NE0008 296 machines · IronWolf Pro Seagate ST12000VE0008 287 machines · SkyHawkAI Western Digital HUH721212ALE600 287 machines · Ultrastar DC HC520 Western Digital HUH721212ALE604 285 machines · Ultrastar DC HC520

Quick answers

Is the WUS721212BLE6L4 officially compatible with my NAS?

It appears on the official compatibility lists of 13 machines and series — 13 Asustor. Every machine page linked below shows the vendor's own list entry, refreshed daily.

Is the WUS721212BLE6L4 a good NAS drive?

This is a Enterprise-class drive: rated for heavier sustained workloads than desktop drives. It is a strong pick for a NAS running 24/7, large-array rebuilds or camera workloads, and enterprise lines are also the drives most widely listed across all five vendors' HCLs. No series-level recording rating is on file for this part number yet, so check CMR vs SMR on the exact model before buying for an array.

Can I use the WUS721212BLE6L4 for a 3-2-1 cold backup copy?

No series-level recording rating is on file for this part number yet — check the exact model for CMR vs SMR before buying it as a large cold copy (SMR is the one trait that makes a 16 TB+ backup copy painfully slow). The 3-2-1 guide and the backup tools encyclopedia cover what to schedule it with.

What are alternatives to the WUS721212BLE6L4?

At the same capacity, the most widely listed alternatives are Western Digital WD121KRYZ (381 machines), Toshiba MG07ACA12TE (329 machines), Seagate ST12000NM0008 (315 machines). The full ranked list is below.