Seagate
Seagate Momentus 4200.2 ST9100822A 100GB 4200 RPM 8MB Cache IDE 2.5" laptop hard drive
100 GB 2.5" IDE laptop drive with 4200 RPM, 8 MB cache and FDB technology
- PackagingBare Drive
- InterfaceIDE Ultra ATA100 / ATA-6
- Capacity100GB
- Cache8MB
- Average Seek Time12.5ms
- Average Latency5.6ms
- 100GB capacity stores large media libraries and applications
- 4200 RPM spindle delivers quiet operation for notebook use
- 8MB cache reduces average seek time to 12.5ms
- IDE Ultra ATA100 interface fits legacy laptop bays
- FDB motor technology extends bearing life in 2.5" form factor
100GB IDE 2.5" Laptop Drive
The Seagate Momentus 4200.2 ST9100822A is a 100GB internal hard drive built for 2.5-inch laptop bays. It spins at 4200 RPM with an 8MB cache and connects via an IDE Ultra ATA100 / ATA-6 interface. The bare drive uses FDB technology and SecureConnect features. It is supplied new without accessories.
Suits legacy IDE systems only
This drive fits notebooks and industrial equipment that require a parallel ATA connection and a 2.5-inch form factor. Buyers needing a Serial ATA interface, higher spindle speeds, or larger capacities should look at something else. The 4200 RPM rating and 12.5ms seek time reflect the original design specification.
IDE Ultra ATA100 interface decides fit
The single specification that determines compatibility is the IDE Ultra ATA100 / ATA-6 interface. Verify the host system uses this exact parallel ATA standard before purchase. No other connector or protocol is supported by this model.
Highlights
- 100GB capacity stores large media libraries and applications
- 4200 RPM spindle delivers quiet operation for notebook use
- 8MB cache reduces average seek time to 12.5ms
- IDE Ultra ATA100 interface fits legacy laptop bays
- FDB motor technology extends bearing life in 2.5" form factor
Specifications
| Brand | Seagate |
|---|---|
| Series | Momentus 4200.2 |
| Model | ST9100822A |
| Packaging | Bare Drive |
| Interface | IDE Ultra ATA100 / ATA-6 |
| Capacity | 100GB |
| Cache | 8MB |
| Average Seek Time | 12.5ms |
| Average Latency | 5.6ms |
| RPM | 4200 RPM |
| Features | FDB technology, SecureConnect |
| Form Factor | 2.5" |
| Shipping weight | 0.24 kg |
| Package size | 102 × 51 × 25 mm |
Questions about this item
What comes with the bare-drive ST9100822A and what must I buy separately?
The box contains only the 2.5-inch 100GB drive itself. You will need to supply mounting screws, an IDE cable if the laptop lacks one, and any operating-system media.
How do I decide between the Momentus 4200.2 versions when the cache and RPM look identical?
All 4200.2 drives share 4200 RPM and 8MB cache; choose by capacity — this model is the 100GB variant — and confirm the laptop accepts IDE Ultra ATA100.
What does the 12.5 ms average seek time mean once the drive is installed?
It is the typical delay for the heads to reach a track; combined with 5.6 ms latency at 4200 RPM, it sets the baseline random-access speed for the 100GB capacity.
New to this? Paying with USDT: TRC-20 or ERC-20 — what to check, what it costs to pay, and what is never asked for.
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