Seagate ST9500423AS Momentus 500GB 7200RPM 2.5" SATA internal hard drive

Capacity and Interface

The Seagate Momentus ST9500423AS is a 500 GB internal hard drive with a 2.5 inch SATA 3 Gb/s interface. It spins at 7200 RPM and includes a 16 MB buffer for caching operations. The drive is supplied in new condition and is designed for 2.5 inch drive bays.

Suitable Uses and Limitations

This drive suits users replacing a failed 2.5 inch SATA drive in a laptop or small-form-factor desktop. It also works as a secondary storage drive in compatible enclosures or drive caddies. Buyers who need a faster solid-state drive or a higher-capacity mechanical drive should look at other options. The 3 Gb/s SATA link may limit throughput on newer controllers that only negotiate higher speeds.

Deciding Specification

The 7200 RPM spindle speed is the single specification that decides whether this is the right part. It delivers higher sustained transfer rates than lower-speed laptop drives, which benefits operating system responsiveness and large file access. If your workload demands the lowest possible access latency, a solid-state drive is the appropriate alternative.