User manual FUJITSU MPE3XXXAT

[. . . ] MPE3xxxAT DISK DRIVES PRODUCT MANUAL C141-E077-01EN REVISION RECORD Edition 01 Date published June, 1999 Revised contents Specification No. : C141-E077-**EN The contents of this manual is subject to change without prior notice. Copyright © 1999 FUJITSU LIMITED C141-E077-01EN i This page is intentionally left blank. PREFACE This manual describes the MPE3xxxAT series, a 3. 5-inch hard disk drive with a BUILT-IN controller that is compatible with the ATA interface. This manual explains, in detail, how to incorporate the hard disk drives into user systems. This manual assumes that users have a basic knowledge of hard disk drives and their application in computer systems. [. . . ] Then the host can read the command block registers to determine what error has occurred and on which sector the error has occurred. At command issuance (I/O registers setting contents) 1F7H(CM) 1F6H(DH) 1F5H(CH) 1F4H(CL) 1F3H(SN) 1F2H(SC) 1F1H(FR) R = 0 or 1 0 × 0 L 1 × 1 DV 0 0 0 R Start head No. / LBA [LSB] Transfer sector count xx 5 - 22 C141-E077-01EN At command completion (I/O registers contents to be read) 1F7H(ST) 1F6H(DH) 1F5H(CH) 1F4H(CL) 1F3H(SN) 1F2H(SC) 1F1H(ER) × L × Status information DV End head No. / LBA [LSB] 00 (*1) Error information *1 If the command is terminated due to an error, the remaining number of sectors of which data was not transferred is set in this register. (6) WRITE MULTIPLE (X'C5') This command is similar to the WRITE SECTOR(S) command. The device does not generate interrupts (assertion of the INTRQ signal) on each sector but on the transfer of a block which contains the number of sectors for which the number is defined by the SET MULTIPLE MODE command. The implementation of the WRITE MULTIPLE command is identical to that of the WRITE SECTOR(S) command except that the number of sectors is specified by the SET MULTIPLE MODE command are transferred without intervening interrupts. In the WRITE MULTIPLE command operation, the DRQ bit of the Status register is required to set only at the start of the data block, not on each sector. The number of sectors (block count) to be transferred without interruption is specified by the SET MULTIPLE MODE command. The SET MULTIPLE MODE command should be executed prior to the WRITE MULTIPLE command. When the WRITE MULTIPLE command is issued, the Sector Count register contains the number of sectors requested (not a number of the block count or a number of sectors in a block). Upon receipt of this command, the device executes this command even if the value of the Sector Count register is less than the defined block count the value of the Sector Count should not be 0). If the number of requested sectors is not divided evenly (having the same number of sectors [block count]), as many full blocks as possible are transferred, then a final partial block is transferred. The number of sectors in the partial block to be transferred is n where n = remainder of ("number of sectors"/"block count"). If the WRITE MULTIPLE command is issued before the SET MULTIPLE MODE command is executed or when WRITE MULTIPLE command is disabled, the device rejects the WRITE MULTIPLE command with an ABORTED COMMAND error. Disk errors encountered during execution of the WRITE MULTIPLE command are posted after attempting to write the block or the partial block that was transferred. Write operation ends at the sector where the error was encountered even if the sector is in the middle of a block. Interrupts are generated when the DRQ bit of the Status register is set at the beginning of each block or partial block. C141-E077-01EN 5 - 23 The contents of the command block registers related to addresses after the transfer of a data block containing an erred sector are undefined. To obtain a valid error information, the host should retry data transfer as an individual requests. At command issuance (I/O registers setting contents) 1F7H(CM) 1F6H(DH) 1F5H(CH) 1F4H(CL) 1F3H(SN) 1F2H(SC) 1F1H(FR) 1 × 1 L 0 × 0 DV 0 1 0 1 Start head No. / LBA [LSB] Transfer sector count xx At command completion (I/O registers contents to be read) 1F7H(ST) 1F6H(DH) 1F5H(CH) 1F4H(CL) 1F3H(SN) 1F2H(SC) 1F1H(ER) Note: When the command terminates due to error, only the DV bit and the error information field are valid. / LBA [LSB] 00H Error information (7) WRITE DMA (X'CA' or X'CB') This command operates similarly to the WRITE SECTOR(S) command except for following events. · · · The data transfer starts at the timing of DMARQ signal assertion. The device controls the assertion or negation timing of the DMARQ signal. [. . . ] When the power of the drive is turned on after the power is turned off once, the status of the write cache function returns to the default state. The default state is "write cache enable", and can be disable by the SET FEATURES command. · · · WRITE SECTOR(S) WRITE MULTIPLE WRITE DMA IMPORTANT When the write cache function is enabled, the transferred data from the host by the WRITE SECTOR(S) is not completely written on the disk medium at the time that the interrupt of command complete is generated. When the unrecoverable error occurs during the write operation, the command execution is stopped. [. . . ]