Interface: ST16000NT001 lists SATA 6 Gb/s; WD161KFGX lists SATA 6Gb/s.
Cache (MB): ST16000NT001 lists 256; WD161KFGX lists 512.
Sustained transfer (up to MB/s): ST16000NT001 lists 270; WD161KFGX lists 259.

A larger cache, higher RPM or higher advertised sequential speed alone does not establish which drive is better for your workload.

Specifications side by side

Show differences only

Manufacturer specifications for ST16000NT001 and WD161KFGX
Specification	ST16000NT001	WD161KFGX
Manufacturer	Seagate	Western Digital
Product family	IronWolf Pro	WD Red Pro
Model number	ST16000NT001	WD161KFGX
Capacity (TB)	16	16
RPM	7200	7200
Interface	SATA 6 Gb/s	SATA 6Gb/s
Recording	CMR	CMR
Cache (MB)	256	512
Form factor	3.5-inch	3.5-inch
Power-on hours per year	8760	Not recorded
Workload rating (TB/year)	550	550
Average operating power (W)	7.6	Not recorded
Rotational vibration sensors	Yes	Not recorded
Manufacturer limited warranty	5 years (eligible new drives)	5 years (eligible new drives)
Sustained transfer (up to MB/s)	270	259
Physical sector size (bytes)	Not recorded	4096

Compatibility and buying checks

Compare new and renewed offers separately. The manufacturer specification does not guarantee the warranty or return policy of a marketplace seller.

Reviewed 2026-09-07. Published specifications; no independent benchmark or failure-rate claim.

Reviewed 2026-08-21. Published specifications; no independent benchmark or failure-rate claim.