Seagate Momentus XT 500GB review

A mutant hard drive born of SSD toxic waste

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Our Verdict

Seagate proves that hybrid has a future. The Momentous XT is a top performer without the price premium.


  • Value for money
  • Almost desktop drive performance


  • No write acceleration
  • Power use same as traditional drive

Seagate's magniloquently monikered Momentous XT has finally arrived in the TechRadar lab, sporting both traditional spinning platters and a chunk of flash memory, resurrecting a concept we'd long dismissed as vapourware.

It's the first hybrid drive we've seen for years: a statement which will make younger readers ask, what's a hybrid drive?

Back before solid state drives became the preferred option for every laptop from the ASUS EeePC to the Alienware M11x, hybrid storage was the Next Big Thing that everyone was excited about.

Drives made entirely of flash memory, like the Kingston V+ series, had been conceived and generally approved of, but everyone assumed they'd be too expensive to be of any practical use for quite some time to come.

While we waited for NAND flash prices to come down, so the theory went, hybrid drives like the Seagate Momentous XT would help sate demand for more performance. Hybrids have both spinning platters for large amounts of cheap storage, and a chunk of solid state memory for speedy access and a performance boost.

Theoretically, they are the best of both worlds, with all the advatanges of both SSDs and traditional disks.

But their time never came.

Before a decent hybrid ever went on sale, solid state prices crashed and the public decided that they didn't really care about the performance difference between traditional and SSD storage anyway.

Or did they?

Tech Specs

Product TypeHybrid Hard Drive
Buffer32 MB
Product FamilyMomentus XT
Drive InterfaceSATA
Drive Width2.5"
Drive Interface StandardSATA/300
Brand NameSeagate
Drive TypeInternal
Storage Capacity500 GB
Rotational Speed7200 rpm
ManufacturerSeagate Technology
Product ModelST95005620AS
Product NameMomentus XT ST95005620AS Hybrid Hard Drive
Product LineMomentus XT
Manufacturer Part NumberST95005620AS
Manufacturer Website Address
Marketing Information

FAST. Intelligent. Affordable.

The Momentus XT SSHD fuses the blazing speed of solid state with the high capacity of a disk drive to unleash your system performance by removing the data bottleneck. The FAST Factor™ advantage takes the Momentus XT drive to a new level by enhancing data integrity and increasing storage longevity.