IBM IC25N020ATDA04 Hard Drive Specifications - Page 205
Write Long 32h/33h
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13.38 Write Long (32h/33h) Command Block Output Registers Register 7 6 5 4 3 2 1 0 Data Feature Sector Count 0 0 0 0 0 0 0 1 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 1 R Command Block Input Registers Register 7 6 5 4 3 2 1 0 Data Error see below Sector Count 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 133. Write Long command (32h/33h) The Write Long command transfers the data and the ECC bytes of the designated one sector from the host to the device, then the data and the ECC bytes are written to the disk media. After 512 bytes of data have been transferred, the device will keep setting DRQ = 1 to indicate that the device is ready to receive the ECC bytes from the host. The data is transferred 16 bits at a time and the ECC bytes are transferred 8 bits at a time. The number of ECC bytes are either 4 or 40 according to setting of the Set Feature option. The default number after power on is 4 bytes. Output Parameters To The Device Sector Count This indicates the number of continuous sectors to be transferred. The Sector Count must be set to one. Sector NumberThis indicates the sector number of the 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 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) Travelstar 48GH, 30GN & 15GN hard disk drive specifications 191