Seagate
Seagate ST940817AM 40GB 5400 RPM 8MB PATA 2.5" laptop hard drive
40 GB 2.5-inch PATA laptop drive rated for extreme temperatures and high shock
- PackagingBare Drive
- InterfacePATA
- Capacity40GB
- Cache8MB
- Average Latency5.6ms
- RPM5400 RPM
- Reliable storage in extreme temperatures with RunOn Technology
- 40GB capacity for essential laptop data
- 5400 RPM spindle speed for consistent performance
- 8MB cache improves data access times
- PATA interface fits compatible legacy laptops
Seagate EE25.2 Series 40GB PATA drive
The Seagate ST940817AM is a new 40GB 2.5-inch laptop hard drive from the EE25.2 Series. It uses a PATA interface and spins at 5400 RPM with an 8MB cache. Designed with RunOn Technology, it targets industrial or embedded systems needing operation in extreme temperatures and high vibration or shock environments.
PATA 2.5-inch bare drive integration
This bare drive fits a standard 2.5-inch PATA bay and requires a compatible host controller to function. It draws power directly from the system and needs no separate adapter beyond the standard 44-pin connector. The drive frees up space in compact chassis where a 3.5-inch unit cannot fit and its rugged design reduces the need for additional shock mounting hardware.
40GB capacity with 5.6ms latency
The 40GB capacity suits lightweight operating systems, firmware images, or small data logs in embedded appliances. The 5.6ms average latency and 5400 RPM spindle deliver consistent access for sequential workloads. It runs out of headroom for modern multimedia libraries, large databases, or applications demanding high random IOPS or transfer rates beyond the PATA bus.
Highlights
- Reliable storage in extreme temperatures with RunOn Technology
- 40GB capacity for essential laptop data
- 5400 RPM spindle speed for consistent performance
- 8MB cache improves data access times
- PATA interface fits compatible legacy laptops
Specifications
| Brand | Seagate |
|---|---|
| Series | EE25.2 Series |
| Model | ST940817AM |
| Packaging | Bare Drive |
| Interface | PATA |
| Capacity | 40GB |
| Cache | 8MB |
| Average Latency | 5.6ms |
| RPM | 5400 RPM |
| Features | Seagate EE25.2 Series 2.5-inch hard drives with RunOn Technology are designed to work in extreme temperatures and tolerate high levels of vibration and shock. |
| Form Factor | 2.5" |
| Shipping weight | 0.09 kg |
| Package size | 102 × 70 × 13 mm |
Questions about this item
Will the 5400 RPM spindle and 8 MB cache become the bottleneck during long write sessions?
The 5400 RPM spindle and 8 MB cache set the sustained throughput ceiling; under continuous writes the mechanical latency of 5.6 ms and the small buffer will be the first limits you hit.
How much heat and noise should I expect from the EE25.2 Series drive running 24/7 in a laptop?
The 2.5 inch 5400 RPM mechanism produces modest heat and low acoustic output; RunOn Technology lets it tolerate extreme temperatures and vibration without extra cooling.
Does my laptop need a 44-pin PATA connector and a 2.5 inch bay for this bare drive to work?
Yes — the drive uses a 44-pin PATA interface and a standard 2.5 inch form factor, so the host must provide that connector and a matching drive bay.
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