IBM DTLA-305040 Hard Drive Specifications - Page 164
Seek 7xh
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12.26 Seek (7xh) Command Block Output Registers Register 7 6 5 4 3 2 1 0 Data Feature Sector Count Sector Number V V V V V V V V Cylinder Low V V V V V V V V Cylinder High V V V V V V V V Device/Head 1 L 1 D H H H H Command 0 1 1 1 - - - - Command Block Input Registers Register 7 6 5 4 3 2 1 0 Data Error see below Sector Count Sector Number V V V V V V V V Cylinder Low V V V V V V V V Cylinder High V V V V V V V V Device/Head Status see below Error Register 76543210 CRC UNC 0 IDN 0 ABT T0N AMN 000V0V00 Status Register 7 6 5 4 3 2 10 BSY RDY DF DSC DRQ COR IDX ERR 0 V 0 V - 0 -V Figure 116. Seek Command (7xh) The Seek command initiates a seek to the designated track and selects the designated head. The device need not be formatted for a seek to execute properly. Output parameters to the device Sector Number In LBA mode this register specifies LBA address bits 0 - 7 for seek. (L=1) Cylinder High/Low The cylinder number of the seek In LBA mode this register specifies LBA address bits 8 - 15 (Low), 16 - 23 (High) for seek. (L=1) H The head number of the seek In LBA mode this register specifies LBA address bits 24 - 27 for seek. (L=1) Input parameters from the device Sector Number In LBA mode this register contains current LBA bits 0 - 7. (L=1) Cylinder High/Low In LBA mode this register contains current LBA bits 8 - 15 (Low), 16 - 23 (High). (L=1) H In LBA mode this register contains current LBA bits 24 - 27. (L=1) Deskstar 40GV & 75GXP hard disk drive specifications 152
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