User manual MAXTOR ST3550N

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Manual abstract: user guide MAXTOR ST3550N

Detailed instructions for use are in the User's Guide.

[. . . ] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ST3655 Family: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ST3285N, ST3390N . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ST3550N, ST3655N . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SCSI Interface Drives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] If there is a reservation access conflict, this command terminates with a reservation conflict status and no data is written. For more information about the reservation conflict status, see Section 3. 2. Bit Byte 0 1 2­5 6 7­8 9 Byte 1 0 0 0 0 0 7 0 6 0 LUN 0 5 1 4 0 DPO 0 0 3 1 FUA 0 0 2 0 0 0 0 1 1 0 0 Flag 0 0 Rel Adr 0 Link Logical block address Transfer length If the DPO (disable page out) bit is one, the cached data that the drive receives during this command has the lowest priority for being retained in the cache. If DPO is zero, the cached data has the highest priority for being retained in the cache. If the FUA (forced unit access) bit is one, the drive must access the disc to write the data sent by the initiator, even if the data could be stored in the cache. If the FUA bit is zero, the drive can write the data to the cache or the disc. If the REL ADR bit is one, the logical block address field specifies the first logical block of the range of logical blocks to be written and verified by the drive. If the REL ADR bit is one, the logical block address field is a two's complement displacement. This displacement is added to the logical block address last accessed on the drive to determine the logical block address for this command. The REL ADR bit should only be one if linked commands are used. ST3655 Family SCSI Drives Product Manual, Rev. A Bytes 2­5 Bytes 7­8 65 The logical block address specifies the logical block where the write operation begins. The transfer length specifies the number of contiguous logical blocks of data to be transferred. A transfer length of zero means that no logical blocks are to be transferred. Any other value indicates the number of logical blocks to be transferred. 3. 5. 4 Seek Extended command (2BH) The Seek Extended command requests that the drive seek to the specified logical block address. This command is the same as the Seek command, except that the CDB includes a 4-byte logical block address. The Seek command is described in Section 3. 4. 8. Bit Byte 0 1 2­5 6 7 8 9 0 0 0 0 0 0 0 0 0 0 0 0 7 0 6 0 LUN 5 1 4 0 0 0 0 0 0 3 1 0 0 0 0 0 2 0 0 0 0 0 0 1 1 0 0 0 0 Flag 0 1 0 0 0 0 Link Logical block address 66 ST3655 Family SCSI Drives Product Manual, Rev. A 3. 5. 5 Write and Verify command (2EH) When the drive receives the Write and Verify command, it writes the data sent by the initiator to the media and then verifies that the data is correctly written. If the host adapter supports disconnection, the drive disconnects while it is executing this command. Bit Byte 0 1 2­5 6 7­8 9 Byte 1 0 0 0 0 0 0 7 0 6 0 LUN 5 1 4 0 0 3 1 0 2 1 0 1 1 BYT CHK 0 Flag 0 0 REL ADR 0 Link Logical block address 0 0 0 0 0 0 Transfer length If the BYT CHK (byte check) bit is zero, the drive verifies the media without performing a byte-by-byte comparison of the data stored there. If the BYT CHK bit is one, the drive verifies the media and performs a byte-by-byte comparison of the data stored there. If the REL ADR bit is one, the logical block address field specifies the first logical block of the range of logical blocks to be written and verified by the drive. [. . . ] Last command byte to data in Description Command to data in or parameter in Symbol T06 Typical Max Command dependent 132 ST3655 Family SCSI Drives Product Manual, Rev. A ­DB(0­7, P) 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 Last byte First byte ­ATN ­SEL ­BUSY ­I/O ­MSG ­C/D ­REQ ­ACK T07, T08 Figure 20. Last command byte to data out Description Command to data out or parameter out Command to data (write to data buffer) Symbol T07 T08 Typical Max Command dependent <500 µsec 1025 µsec ST3655 Family SCSI Drives Product Manual, Rev. A 133 ­DB(0­7, P) 0 1 0 1 0 1 0 1 0 1 0 Identify message First byte ­ATN ­SEL ­BUSY ­I/O ­MSG 1 0 1 0 1 0 1 ­C/D ­REQ ­ACK T16 Figure 21. [. . . ]

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