Hitachi T7K250 Specifications - Page 241
Write Multiple C5h
UPC - 000062373678
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12.53 Write Multiple (C5h) 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 1 1 0 0 0 1 0 1 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 The Write Multiple command transfers one or more sectors from the host to the device. The data is then written to the disk media. Command execution is identical to the Write Sectors command except that an interrupt is generated for each block as defined by the Set Multiple command instead of for each sector. The sectors are transferred through the Data Register 16 bits at a time. Output parameters to the device Sector Count This indicates the number of continuous sectors to be transferred. If the Sector Count of 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) Input parameters from the device Sector Count This indicates the number of requested sectors not transferred. The Sector Count 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 current the LBA bits 0-7. (L = 1) Cylinder High/Low This indicates the cylinder number of the last transferred sector. (L = 0) In LBA mode this register contains the current LBA bits 8-15 (Low) and bits 16-23 (High). (L = 1) H This indicates the head number of the last transferred sector. (L = 0) In LBA mode this register contains current the LBA bits 24-27. (L = 1) Deskstar T7K250 Hard Disk Drive Specification 227