IBM IC25N020ATDA04 Hard Drive Specifications - Page 165
Recalibrate 1xh, If the device cannot reach cylinder 0
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13.20 Recalibrate (1xh) Command Block Output Registers Register 7 6 5 4 3 2 1 0 Data Feature Sector Count Sector Number Cylinder Low Cylinder High Device/Head 1 - 1 D - - - - Command 0 0 0 1 - - - - Command Block Input Registers Register 7 6 5 4 3 2 1 0 Data Error see below Sector Count Sector Number Cylinder Low Cylinder High Device/Head Status see below Error Register 76543210 CRC UNC 0 IDN 0 ABT T0N AMN 00000VV0 Status Register 7 6 5 4 3 2 10 BSY RDY DF DSC DRQ COR IDX ERR 0 V 0 V - 0 -V Figure 99. Recalibrate command (1xh) The Recalibrate command moves the read/write heads from anywhere on the disk to cylinder 0. If the device cannot reach cylinder 0, T0N (Track 0 Not Found) will be set in the Error Register. Travelstar 48GH, 30GN & 15GN hard disk drive specifications 151