Hitachi IC25N040ATCS04-0 Specifications - Page 158
Read Verify Sectors 40h/41h
UPC - 683728198664
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13.18 Read Verify Sectors (40h/41h) 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 0 0 0 0 R 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 Error Register 76543210 CRC UNC 0 IDN 0 ABT T0N AMN 0V0V0V0V Status Register 7 6 5 4 3 2 10 BSY RDY DF DSC DRQ COR IDX ERR 0 V 0 V - 0 -V Figure 103. Read Verify Sectors command (40h/41h) The Read Verify Sectors command verifies one or more sectors on the device. No data is transferred to the host. The difference between the Read Sectors command and Read Verify Sectors command is that data is transferred to the host during a Read Sectors command and data is not transferred to the host during a Read Verify Sectors command. If an uncorrectable error occurs, the read verify will be terminated at the failing sector. Output parameters to the device Sector Count This is the number of continuous sectors to be verified. If zero is specified, 256 sectors will be verified. Sector Number This is 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 is 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 is 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 is the retry bit, but this bit is ignored. Hitachi Travelstar 60GH & 40GN hard disk drive specifications 145