The HM121HC is a slimline 2.5" notebook size hard drive. This drive will not fit in cases designed for 3.5" drives without modifications and/or adapters.

• Ultra DMA Mode 5 compatible
  
• ATA S.M.A.R.T. Feature Set
• Load/Unload Technology
• PMR/TuMR Head with FOD Technology
• SilentSeek
• NoiseGuard
• Supports Automatic Acoustic Management (AAM)
  

HM121HC Specifications
Interface	ATA-5
Capacity	120GB
Speed	5,400 rpm
Cache	8MB
Power Requirements	5V ± 5%
Current	Seek 2.1W; Idle 0.6W
Acoustics	Idle 2.2 bel; Seek 2.4 bel
MTBF (meantime between failures)	330,000 POH
Average Seek Time	12 ms
Average Latency	5.6 ms
Shock (1/2 sine wave)	Operating 325G; Non-operating 1,000G
Operating Temperature	Operating 5°C ~ 55°C; Non-operating -40°C ~ 70°C
Operating Humidity	5% ~ 90% (relative humidity; non-condensing)

Note: A notebook hard drive has a 44-pin IDE connector. In most cases, hard drives are connected to the mainboard through a 40-pin IDE cable. You may need an HD converter or a notebook HD to IDE cable. Cases that require a notebook hard drive contain this cable.

For more information, please see this product's webpage.