1.8" Hard Drives: Small is Beautiful

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
Interface UltraATA/100
(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)
Power Draw
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.
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  • Anonymous
    Where can i find an enclosure that can read from this HD?
  • Anonymous
    On ebay, for around $10
  • Anonymous
    great article, this HDD type is new to me.. :)
  • Anonymous
    Where did you hear "big is beautiful"? This author probably has a fat ass girlfriend!