Hitachi HTS541040G9AT00 Specifications - Page 136
Initialize Device Parameters 91h
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13.11 Initialize Device Parameters (91h) Table 81: Initialize Device Parameters command (91h) Command Block Output Registers Register 7 6 5 4 3 2 1 0 Data Feature Sector Count V V V V V V V V LBA Low LBA Mid LBA High Device 1 - 1 D H H H H Command 1 0 0 1 0 0 0 1 Command Block Input Registers Register 7 6 5 4 3 2 1 0 Data Error Sector Count LBA Low LBA Mid LBA High Device Status see below 76 CRC UNC 00 Error Register 54 3 2 1 0 0 IDN 0 ABT T0N AMN 00 0 V 0 0 Status Register 7 654 3 2 1 0 BSY RDY DF DSC DRQ COR IDX ERR 0 00- - 0 - V The Initialize Device Parameters command enables the host to set the number of sectors per track and the number of heads minus 1, per cylinder. Words 54-58 in Identify Device Information reflects these parameters. The parameters remain in effect until the following events occur: • Another Initialize Device Parameters command is received. • The device is powered off. • A hard reset occurs. • A soft reset occurs and the Set Feature option of CCh is set. Output parameters to the device Sector Count This indicates the number of sectors per track. Zero (0) indicates 0 sectors per track instead of 256 sectors per track. It means that there are no sectors per track. H This indicates the number of heads minus 1 per cylinder. The minimum is 0 and the maxi- mum is 15. Travelstar 5K100 Hard Disk Drive Specification 122