Verdict

For a NAS or any RAID array, the ST4000VN006 is the pick - it's CMR. The ST4000DM004 uses SMR recording, which is not recommended for RAID (single-drive or archival use only).

ST4000DM004
Seagate BarraCuda · 4TB · Desktop
No US price yet
ST4000VN006
Seagate IronWolf · 4TB · NAS
$313 ($78.35/TB)

Value at a glance

Price / TB
ST4000DM004 $59.26
ST4000VN006 $48.36
Capacity
ST4000DM004 4 TB
ST4000VN006 4 TB

Price history

US · cheapest per day

ST4000VN006 $313
zoomed · drag to zoom
$403 $276 $149 Jan 3 Feb 19 Apr 7 May 24 Jul 10 Aug 26
ST4000DM004 ST4000VN006
Capacity 4 TB 4 TB
Recording tech SMR CMR
RAID / NAS safe No Yes
Class Desktop NAS
Spindle speed 5400 RPM 5400 RPM
Cache 256 MB 256 MB
Noise (idle) 22 dB -
Fill Air Air
Interface SATA SATA
Failure rate (AFR) - -
Price / TB $59.26 $48.36
Buy No US price yet
$313
View at Amazon →

Highlighted cells mark the stronger spec for a NAS build. Failure rates from Backblaze Drive Stats where available; $/TB uses the cheapest live price. Buy links are Amazon affiliate.

ST4000DM004

No Backblaze failure data for this model.

2yr warranty

ST4000VN006

No Backblaze failure data for this model.

3yr warranty · 180 TB/yr rated · 1,000,000h MTBF