Hitachi 7K250 Specifications - Page 174
Read Verify Sectors 42h
UPC - 000004558972
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12.27 Read Verify Sector(s) (42h) Table 93: Read Verify Sector(s) command (42h) Command Block Output Registers Register 7 6 5 4 3 2 1 0 Data Low Data High Current Feature Previous Sector Count Current Previous V V V V V V V V V V V V V V V V Sector Number Current Previous V V V V V V V V V V V V V V V V Cylinder Current Low Previous V V V V V V V V V V V V V V V V Cylinder Current V V V V V V V V High Previous V V V V V V V V Device/Head 1 1 1 D - - - - Command 0 0 1 0 0 0 1 0 76 CRC UNC 00 Error Register 54 3 2 1 0 0 IDN 0 ABT T0N AMN 0V 0 V 0 V Command Block Input Registers Register 7 6 5 4 3 2 1 0 Data Low Data High Error see below Sector Count HOB=0 HOB=1 Sector Number HOB=0 HOB=1 Cylinder HOB=0 Low HOB=1 Cylinder HOB=0 High HOB=1 Device/Head Status V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V See below ... Status Register 7 654 3 2 1 0 BSY RDY DF DSC DRQ COR IDX ERR 0 V0V - 0 - V The Read Verify Sector(s) Ext command verifies one or more sectors on the device. No data is transferred to the host. The difference between the Read Sector(s) command and the Read Verify Sector(s) command is whether data is transferred to the host or not. If an uncorrectable error occurs, the Read Verify Sector(s) Ext will be terminated at the failing sector. Output parameters to the device Sector Count Current The number of continuous sectors to be verified low order, bits (7:0). Sector Count Previous The number of continuous sectors to be verified high order, bits (15:8). If zero is specified in the Sector Count register, 65,536 sectors will be transferred. Sector Number Current LBA (7:0) Sector Number Previous LBA (31:24) Cylinder Low Current LBA (15:8) Cylinder Low Previous LBA (39:32) Cylinder High Current LBA (23:16) Cylinder High Previous LBA (47:40) Deskstar 7K250 Hard Disk Drive Specification 160