Hitachi 7K400 Specifications - Page 138
Format Track 50h
UPC - 000053412935
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12.8 Format Track (50h) Table 87: Format Track command (50h) Command Block Output Registers Register 7 6 5 4 3 2 1 0 Data Feature Sector Count 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 1 0 1 0 0 0 0 76 CRC UNC 00 Error Register 54 3 2 1 0 0 IDN 0 ABT T0N AMN 0V 0 V 0 0 Command Block Input Registers Register 7 6 5 4 3 2 1 0 Data Error see below Sector Count 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 Status Register 7 654 3 2 1 0 BSY RDY DF DSC DRQ COR IDX ERR 0 V0V - 0 - V The Format Track command formats a single logical track on the device. Each good sector of data on the track will be initialized to zero with the write operation. At this time, the read operation does not verify the correct initialization of the data sector. Any data previously stored on the track will be lost. The host may transfer a sector of data containing a format table to the device. But the device ignores the format table and writes zero to all sectors on the track regardless of the descriptors. Since device performance is optimal at 1:1 interleave and the device uses relative block addressing internally, the device will always format a track in the same way no matter what sector numbering is specified in the format table. Output parameters to the device Sector Number In LBA mode this register specifies that LBA address bits 0-7 are to be formatted. (L=1). Cylinder High/Low This indicates the cylinder number of the track to be formatted. (L = 0) In LBA mode this register specifies that LBA address bits 8-15 (Low) and bits 16-23 (High) are to be formatted. (L = 1) H This indicates the head number of the track to be formatted (L = 0). In LBA mode this reg- ister specifies that LBA address bits 24-27 are to be formatted. (L= 1) Input parameters from the device Sector Number In LBA mode this register specifies the current LBA address bits as 0-7 (L = 1). Cylinder High/Low In LBA mode this register specifies the current LBA address bits as 8-15 (Low) and bits 16-23 (High). H In LBA mode this register specifies the current LBA address bits as 24-27 (L=1). Error The Error Register. An Abort error (ABT=1) will be returned when LBA is out of range In LBA mode this command formats a single logical track including the specified BLA. Deskstar 7K400 Hard Disk Drive Specification 124