Page 1:Will 1.8" Hard Drives Do The Job?
Page 2:PMR: Perpendicular Magnetic Recording
Page 3:Comparing The Candidates
Page 4:Hitachi TravelStar C4K60: 1.8", 30 GB
Page 5:Toshiba MK8007GAH: 1.8", 80 GB
Page 6:Toshiba MK4007GAL: 1.8", 40 GB
Page 7:Test Setup
Page 8:Data Transfer Performance
Page 9:Access Time
Page 10:Interface Performance
Page 11:I/O Performance
Page 12:Application Performance
Comparing The Candidates
Toshiba's new 1.8" drives are the second generation to benefit from perpendicular recording. In contrast, Hitachi still uses conventional, longitudinal recording technology, which explains the capacity differences: Hitachi can provide 30 GB per 1.8" platter while Toshiba's drives store 40 GB each.
The platter configuration determines the height of both 1.8" drive products: if two platters are used, both models have a height of 8 mm (0.315"), while the single-platter versions get by with a height of only 5 mm (0.197"). Toshiba offers its drives with a Micro-ATA interface or using the CE-compliant Zero Insertion Force (ZIF) connector. Hitachi decided to implement either the full Mini-ATA connector, which is used by all 2.5" UltraATA drives, or the ZIF interface.
|Hitachi C4K60||Toshiba MK8004/4007|
|Capacity Points||20, 30, 40 and 60 GB||20, 30, 40, 60 and 80 GB|
|Spindle Speed||4,200 RPM||4,200 RPM|
(ZIF, Mini ATA)
(ZIF, Micro ATA)
|Cache||2 MB||2 MB|
|Seek Time||15 ms||15 ms|
|Weight||Single platter models: 46 g (1.62 oz)
Dual platter models: 57 g (2.01 oz)
|Single platter models: 51 g (1.8 oz)
Dual platter models: 62 g (2.19 oz)
|Operating Temperature||5-60°C (41-140°F)||5-60°C (41-140°F)|
|1.4/1.0/0.4/0.08 W||1.8/1.1/0.4/0.07 W|
The high capacity drives are thicker due to their two-platter configuration.
We received Hitachi's CE version of the C4K60, which uses a ZIF interface to connect the drive to its host. However, the protocol used is UltraATA/100.
- Will 1.8" Hard Drives Do The Job?
- PMR: Perpendicular Magnetic Recording
- Comparing The Candidates
- Hitachi TravelStar C4K60: 1.8", 30 GB
- Toshiba MK8007GAH: 1.8", 80 GB
- Toshiba MK4007GAL: 1.8", 40 GB
- Test Setup
- Data Transfer Performance
- Access Time
- Interface Performance
- I/O Performance
- Application Performance