1TB Western Digital, AV-25, Mobile 2.5″ 5400...

24×7 reliability
These drives are designed to last in high temperature always-on streaming digital audio/video environments such as PVR, DVR, and IPTV systems.
Advanced Format technology
Leading edge technology delivers improved video quality and AV performance through enhanced error correction capability.
SilkStream
Optimized for smooth, continuous digital video playback of up to 12 simultaneous HD streams. SilkStream is compatible with the ATA streaming command set allowing CE customers to use standard streaming management and error recovery options.
Ultra-cool operation
A cool drive is a more reliable drive. WD continues to develop new and innovative ways to keep drives cool while they operate.
Low power consumption
These drives draw less than 2 Watts while operating, and draw a mere 4.75 Watts during spin up.
Preemptive Wear Leveling (PWL)
The drive arm frequently sweeps across the disk to reduce uneven wear on the drive surface, an occurance common to audio video streaming applications.
Usage For Video Surveillance