IBM IC35L020 Hard Drive Specifications - Page 149
Read Verify Sectors 40h/41h
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15.18 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 96. Read Verify Sectors Command (40h/41h) The Read Verify Sectors verifies one or more sectors on the device. No data is transferred to the host. The difference of Read Sectors command and Read Verify Sectors command is whether the data is transferred to the host or not. If an uncorrectable error occurs, the read verify will be terminated at the failing sector. Output parameters to the device Sector Count The number of continuous sectors to be verified. If zero is specified, then 256 sectors will be verified. 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. If set to one, then retries are disabled. Deskstar 60 GXP Hard disk drive specification 135