Drive comparison
MG09ACA18TA vs WD181KFGX
Toshiba MG09 18TB and Western Digital WD Red Pro 18TB, compared using published manufacturer specifications.
Toshiba
MG09 18TB
MG09ACA18TA
SATA 6 Gb/s · 3.5-inch
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Western Digital
WD Red Pro 18TB
WD181KFGX
SATA 6Gb/s · 3.5-inch
$544.00
Amazon US · Used / renewed listing ↗ASIN B09CN2CBH8 · as of Sep 12, 2026 10:56 UTC
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What differs between these models?
- Interface: MG09ACA18TA lists SATA 6 Gb/s; WD181KFGX lists SATA 6Gb/s.
- Sustained transfer (up to MB/s): MG09ACA18TA lists 281; WD181KFGX lists 272.
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
| Specification | MG09ACA18TA | WD181KFGX |
|---|---|---|
| Manufacturer | Toshiba | Western Digital |
| Product family | MG09 | WD Red Pro |
| Model number | MG09ACA18TA | WD181KFGX |
| Capacity (TB) | 18 | 18 |
| RPM | 7200 | 7200 |
| Interface | SATA 6 Gb/s | SATA 6Gb/s |
| Cache (MiB) | 512 | Not recorded |
| Form factor | 3.5-inch | 3.5-inch |
| Sector format | 4Kn | Not recorded |
| Workload rating (TB/year) | 550 | 550 |
| Manufacturer limited warranty | 5 years (eligible new drives) | 5 years (eligible new drives) |
| Sustained transfer (up to MB/s) | 281 | 272 |
| Recording | Not recorded | CMR |
| Cache (MB) | Not recorded | 512 |
| Physical sector size (bytes) | Not recorded | 4096 |
Compatibility and buying checks
- Check sector-format support in the controller and operating system, particularly for native 4K (4Kn) variants.
- Compare new and renewed offers separately. The manufacturer specification does not guarantee the warranty or return policy of a marketplace seller.
Manufacturer sources
MG09ACA18TA
Toshiba MG09 manufacturer specifications ↗ · pages 5
Reviewed 2026-09-07. Published specifications; no independent benchmark or failure-rate claim.
WD181KFGX
Western Digital WD Red Pro manufacturer datasheet ↗
Reviewed 2026-08-21. Published specifications; no independent benchmark or failure-rate claim.