Seagate
Seagate ST9320320AS 320GB 5400 RPM 8MB SATA 3.0Gb/s 2.5" laptop hard drive
320 GB 2.5" SATA laptop drive spinning at 5400 RPM with 8 MB cache and 5.6 ms latency
- PackagingBare Drive
- InterfaceSATA 3.0Gb/s
- Capacity320GB
- Cache8MB
- Average Latency5.6ms
- RPM5400 RPM
- 320 GB capacity stores large media libraries
- 5400 RPM spindle speed balances performance and power draw
- 8 MB cache accelerates frequent file access
- SATA 3.0 Gb/s interface fits standard laptop bays
- 6 ms average latency reduces wait times
2.5-inch SATA 3.0Gb/s 320GB laptop drive
The Seagate ST9320320AS is a 2.5-inch internal hard drive with a 320GB capacity, 5400 RPM spindle speed and 8MB cache. It connects through a SATA 3.0Gb/s interface and has an average latency of 5.6ms. The unit is supplied as a bare drive in new condition.
Suits older laptops needing a direct SATA
This drive fits 2.5-inch SATA bays in legacy notebooks or external enclosures that accept a 3.0Gb/s mechanical disk. It is not for machines that only accept M.2 or PCIe modules, nor for users who need solid-state speeds or larger capacities.
The SATA 3.0Gb/s interface decides compatibility
The drive uses the SATA 3.0Gb/s interface, so the host system must provide a matching 2.5-inch SATA connector and support 3.0Gb/s signalling. Without that specific interface the drive cannot be installed or used.
Highlights
- 320 GB capacity stores large media libraries
- 5400 RPM spindle speed balances performance and power draw
- 8 MB cache accelerates frequent file access
- SATA 3.0 Gb/s interface fits standard laptop bays
- 6 ms average latency reduces wait times
Specifications
| Brand | Seagate |
|---|---|
| Model | ST9320320AS |
| Packaging | Bare Drive |
| Interface | SATA 3.0Gb/s |
| Capacity | 320GB |
| Cache | 8MB |
| Average Latency | 5.6ms |
| RPM | 5400 RPM |
| Form Factor | 2.5" |
| Shipping weight | 0.09 kg |
| Package size | 127 × 83 × 13 mm |
Questions about this item
Does the bare drive include mounting screws or a SATA cable, or must I supply them separately?
The drive is supplied as a bare unit only. Mounting screws, a SATA data cable and any adapter brackets are not included and must be sourced separately.
This model is listed as Momentus 5400.5 — is that the only version available for the 320 GB capacity?
The ST9320320AS is the Momentus 5400.5 variant. No other version or capacity is offered under this part number.
With a 5400 RPM spindle and 8 MB cache, what sustained transfer rate should I expect inside a laptop?
The SATA 3.0 Gb/s interface caps the burst rate, while the 5400 RPM mechanism and 5.6 ms average latency determine real-world sustained throughput.
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