IBM IC35L040AVVN07-0 Hard Drive Specifications - Page 204
Write Sectors 30h/31h
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11.41 Write Sectors (30h/31h) Command Block Output Registers Register 76543210 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 0011000R Command Block Input Registers Register 76543210 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 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 V V - 0 -V Figure 159. Write Sectors Command (30h/31h) 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 The number of continuous sectors to be transferred. If zero is specified, 256 sectors will be transferred. Sector Number The sector number of the first sector to be transferred. (L=0) In LBA mode this register contains LBA bits 0 - 7. (L=1) Cylinder High/Low The cylinder number of the first sector to be transferred. (L=0) In LBA mode this register contains LBA bits 8 - 15 (Low), 16 - 23 (High). (L=1) H The head number of the first sector to be transferred. (L=0) In LBA mode this register contains LBA bits 24 - 27. (L=1) R The retry bit. This bit is ignored. Deskstar 120GXP hard disk drive specifications 190