Fujitsu MPD3173AT Product Manual - Page 174
Logical address, Address translation example in CHS mode
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6.2.2 Logical address (1) CHS mode Logical address assignment starts from physical cylinder (PC) 0, physical head (PH) 0, and physical sector (PS) 1 and is assigned by calculating the number of sectors per track which is specified by the INITIALIZE DEVICE PARAMETERS command. The head address is advanced at the subsequent sector from the last sector of the current physical head address. The first physical sector of the subsequent physical sector is the consecutive logical sector from the last sector of the current physical sector. Figure 6.5 shows an example (assuming there is no track skew). Physical sector Physical cylinder 0 Physical head 0 1 2 3 . . 62 63 64 . . 126 127 . . 189 190. . 406 407 408 LS LS LS LS LS LS LS LS LS SP SP 1 2 . . 63 1 . . 63 1 . . 63 1 . . 28 LH0 LH1 LH2 Physical sector 1 . . 35 36 . . 98 99 . .161 162. . 224 225 . . . . 407 408 Physical cylinder 0 LS LS LS LS LS LS LS LS LS SP SP Physical head 1 29 . . 63 1 . . 63 1 . . 63 1 . . 63 1 .. .. .. .. LH6 LH7 LH8 LH9 LH10 ex: Zone 0 Physical parameter - Physical sector: 1 to 406 (For the rest, 2 spare sectors) Specification of INITIALIZE DEVICE PARAMETERS command - Logical head: LH=0 to 14 - Logical sector: LS=1 to 63 Figure 6.5 Address translation (example in CHS mode) C141-E069-02EN 6 - 7
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