Seagate
Seagate ST3120026AS 120GB 7200 RPM 8MB SATA 1.5Gb/s 3.5" internal hard drive
A 120 GB desktop hard drive spinning at 7200 RPM with 8 MB cache on a SATA 1.5Gb/s interface
- PackagingBare Drive
- InterfaceSATA 1.5Gb/s
- Capacity120GB
- RPM7200 RPM
- Cache8MB
- Average Seek Time8.5ms
- 7200 RPM spindle speed accelerates data access
- 8 MB cache buffer smooths burst transfers
- SATA 1.5Gb/s interface connects to desktop motherboards
- 120 GB capacity stores operating system and applications
- 350 Gs non‑operating shock rating protects stored data
Capacity and use-case
This 120 GB desktop hard drive suits basic storage needs such as legacy operating systems, small application sets or secondary data volumes. Its 7200 RPM spindle and 8 MB cache deliver standard mechanical performance for everyday tasks. The SATA 1.5 Gb/s interface matches older motherboards and controllers that do not support faster SATA revisions. Buyers who need more capacity or modern transfer speeds should consider other options.
Build and connectors
The bare 3.5 inch drive measures 1.0 inch high and uses the 350 Gs non-operating shock rating together with a 3D Defense System for physical resilience. A standard SATA data and power connector pair provides simple installation in any compatible bay or caddy. The 8.5 ms average seek time and 4.16 ms latency reflect typical mechanical behaviour for this class of drive.
Compatibility check
Verify that the host system provides a free SATA port operating at 1.5 Gb/s and a 3.5 inch drive bay with the correct mounting holes. Ensure the power supply includes a SATA power lead or an adapter for the drive’s connector. Confirm the BIOS or operating system can recognise a 120 GB volume without additional drivers or updates.
Highlights
- 7200 RPM spindle speed accelerates data access
- 8 MB cache buffer smooths burst transfers
- SATA 1.5Gb/s interface connects to desktop motherboards
- 120 GB capacity stores operating system and applications
- 350 Gs non‑operating shock rating protects stored data
Specifications
| Brand | Seagate |
|---|---|
| Series | BarraCuda 7200.7 |
| Model | ST3120026AS |
| Packaging | Bare Drive |
| Interface | SATA 1.5Gb/s |
| Capacity | 120GB |
| RPM | 7200 RPM |
| Cache | 8MB |
| Average Seek Time | 8.5ms |
| Average Latency | 4.16ms |
| Features | 350 Gs non-op shock 3D Defense System |
| Form Factor | 3.5" |
| Shipping weight | 0.57 kg |
| Package size | 146 × 102 × 25 mm |
Questions about this item
What practical throughput does the SATA 1.5Gb/s interface cap this drive at?
The SATA 1.5Gb/s interface limits maximum transfer to 1.5 Gb/s, so real-world throughput will not exceed that ceiling.
What physical clearance and bay size does the 3.5" 1.0 inch low-profile form factor require?
It fits a standard 3.5" drive bay and needs 1.0 inch of vertical clearance for the low-profile height.
How is the bare drive installed, and which jumper step is often missed?
Mount it in a 3.5" bay, connect SATA data and power cables, and ensure no legacy master/slave jumper is set because SATA drives do not use them.
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