Western Digital Ultrastar DC HA340 8TB
Enterprise HDD
Part number 0B47078 (WUS721208BLE6L4) · Ultrastar DC HA340 series · SATA 6Gb/s (SATA III). If your machine is listed below, this drive is officially supported — not a forum workaround.
Part of the Western Digital Ultrastar DC HA340 series →
Check 0B47078 price on Amazon partner link
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 92 machines and series — 92 QNAP. 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
Same-capacity alternatives
Other drives listed at 8 TB capacity, ranked by how many machines list them:
Quick answers
Is the 0B47078 (WUS721208BLE6L4) officially compatible with my NAS?
It appears on the official compatibility lists of 92 machines and series — 92 QNAP. Every machine page linked below shows the vendor's own list entry, refreshed daily.
Is the 0B47078 (WUS721208BLE6L4) 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 0B47078 (WUS721208BLE6L4) 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 0B47078 (WUS721208BLE6L4)?
At the same capacity, the most widely listed alternatives are Toshiba MG05ACA800E (393 machines), Seagate ST8000NM0206 (369 machines), Toshiba MN06ACA800 (347 machines). The full ranked list is below.