Cache (MB): ST16000NM004J lists 256; ST16000NM007H lists 512.
Average idle power (W): ST16000NM004J lists 5.5; ST16000NM007H lists 6.5.
Sustained transfer (up to MB/s): ST16000NM004J lists 270; ST16000NM007H lists 285.

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 ST16000NM004J and ST16000NM007H
Specification	ST16000NM004J	ST16000NM007H
Manufacturer	Seagate	Seagate
Product family	Exos X18	Exos X24
Model number	ST16000NM004J	ST16000NM007H
Capacity (TB)	16	16
RPM	7200	7200
Interface	SAS 12 Gb/s	SAS 12 Gb/s
Cache (MB)	256	512
Form factor	3.5-inch	3.5-inch
Average idle power (W)	5.5	6.5
Power-on hours per year	8760	8760
Manufacturer limited warranty	5 years (eligible new drives)	5 years (eligible new drives)
Sustained transfer (up to MB/s)	270	285

Compatibility and buying checks

A SAS drive requires a compatible SAS controller or backplane. A normal motherboard SATA port cannot operate a SAS drive.
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 2026-09-07. Published specifications; no independent benchmark or failure-rate claim.