Hitachi 7K400 Specifications - Page 253
Write Sectors 30h/31h
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12.58 Write Sectors (30h/31h) Table 178: Write Sectors command (30h/31h) 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 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 0 1 1 0 0 0 R 76 5 CRC UNC 0 00 0 Error Register 43 21 0 IDN 0 ABT T0N AMN V0 V0 0 Command Block Input Registers Register 7 6 5 4 3 2 1 0 Data Error see below Sector Count V V V V V V V V 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 - - - - H H H H Status see below 7 65 BSY RDY DF 0 V0 Status Register 43 2 DSC DRQ COR V- 0 10 IDX ERR -V The Write Sectors command transfers one or more sectors from the host to the device. The data is then written to the disk media. The sectors are transferred through the Data Register 16 bits at a time. If an uncorrectable error occurs, the write will be terminated at the failing sector. Output parameters to the device Sector Count This indicates the number of continuous sectors to be transferred. If zero is specified, 256 sectors will be transferred. Sector Number This indicates the sector number of the first sector to be transferred. (L = 0) In LBA mode this register contains the LBA bits 0-7. (L = 1) Cylinder High/Low This indicates the cylinder number of the first sector to be transferred. (L = 0) In LBA mode this register contains the LBA bits 8-15 (Low) and bits 16-23 (High) (L = 1) H This indicates the head number of the first sector to be transferred. (L = 0) In LBA mode this register contains the LBA bits 24-27. (L = 1) R This indicates the retry bit. this bit is ignored. Input parameters from the device Sector Count This indicates the number of requested sectors not transferred. This will be zero unless an unrecoverable error occurs. Sector Number This indicates the sector number of the last transferred sector. (L = 0) In LBA mode this register contains the current LBA bits 0-7. (L = 1) Deskstar 7K400 Hard Disk Drive Specification 239
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