Interface: MN11ACA18TS lists SATA 6 Gb/s; WD181KFGX lists SATA 6Gb/s.
Workload rating (TB/year): MN11ACA18TS lists 180; WD181KFGX lists 550.
Manufacturer limited warranty: MN11ACA18TS lists 3 years (eligible new drives); WD181KFGX lists 5 years (eligible new drives).

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 MN11ACA18TS and WD181KFGX
Specification	MN11ACA18TS	WD181KFGX
Manufacturer	Toshiba	Western Digital
Product family	N300	WD Red Pro
Model number	MN11ACA18TS	WD181KFGX
Capacity (TB)	18	18
RPM	7200	7200
Interface	SATA 6 Gb/s	SATA 6Gb/s
Recording	CMR	CMR
Form factor	3.5-inch	3.5-inch
Package / region	Bulk / EMEA	Not recorded
Workload rating (TB/year)	180	550
Manufacturer limited warranty	3 years (eligible new drives)	5 years (eligible new drives)
Cache (MB)	Not recorded	512
Physical sector size (bytes)	Not recorded	4096
Sustained transfer (up to MB/s)	Not recorded	272

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.