IBM DTTA-351010 Hard Drive Specifications - Page 147
for seek. L=1
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12.25 Seek (7xh) Command Block Output Registers Register 76543210 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 1L1DHHHH Command 0111 Command Block Input Registers Register 76543210 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 HHHH Status ...See Below... Error Register 76543210 CRC UNC 0 IDN 0 ABT T0N AMN 000V0V00 Status Register 76543210 BSY RDY DF DSC DRQ COR IDX ERR 0V0V 0 V Figure 107. 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 ) Command Descriptions 139