Hitachi 7K250 Specifications - Page 26
Data sheet - 80gb
UPC - 000004558972
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Notes: 1. Number of cylinders: For drives with capacities greater than 8.45 GB the Identify Device information word 01 limits the number of cylinders to 16, 383 per the ATA specification. 2. Logical layout: Logical layout is an imaginary drive parameter (that is, the number of heads) which is used to access the drive from the system interface. The logical layout to Physical layout (that is, the actual Head and Sectors ) translation is done automatically in the drive. The default setting can be obtained by issuing an IDENTIFY DEVICE command. 4.2 Data sheet Table 2: Mechanical positioning performance Data transfer rates (Mbps) Interface transfer rates (Mb/s) Data buffer size1 (KB) Rotational speed (RPM) Number of buffer segments (read) Number of buffer segments (write) Recording density - max (Kbpi) Track density [TPI] Areal density - max (Gbits/in2 ) Number of data bands 757 100 2048 / 8192 7200 up to 128 up to 63 689 87/90 (40/80GB) 90 (120/160GB) 90/93.5 (250GB) 62 30 Deskstar 7K250 Hard Disk Drive Specification 12