User manual SEAGATE DIAMONDMAX 1750

[. . . ] DiamondMaxTM 1750 87000A8, 86480A8, 85250A6 84320A5, 83500A4, 83240A4 82560A3, 81750A2 Part #1370/C All material contained herein Copyright © 1997 Maxtor Corporation. CrystalMaxTM, CrystalMaxTM 1080, DiamondMaxTM, DiamondMaxTM 1750 and MaxFaxTM are trademarks of Maxtor Corporation. No Quibble® Service is a registered trademark of Maxtor Corporation. Other brands or products are trademarks or registered trademarks of their respective holders. [. . . ] Aborted Command ­ Invalid commands, write fault, no seek complete, or drive not ready. Track 0 Error ­ Track 0 was not found during execution of a Restore command. Address Mark Not Found ­ The Address Mark could not be found after an ID match. Features Register Enables or disables features through the Set Features command. 6 ­ 34 HOST SOFTWARE INTERFACE Sector Count Register Holds the number of sectors to be sent during a Read or Write command, and the number of sectors per track during a Format command. A value of zero in this register implies a transfer of 256 sectors. A multi-sector operation decrements the Sector Count register. If an error occurs during such an operation, this register contains the remaining number of sectors to be transferred. Sector Number Register Holds the starting sector number for any disk operation. The register is updated as each sector is processed in a multi-sector operation. Cylinder Number Registers Two 8-bit Cylinder Number registers (Low and High) specify the starting cylinder for disk operation. Device/Head Register Used to specify the drive and head number to be operated on during any disk operations. Within the context of a Set Parameters command, this register specifies the maximum number of heads on the drive. Bit definitions follow: 7 1 6 LBA LBA Mode 5 1 4 DRV Drive Select 3 HS3 Head Select 2 HS2 Head Select 1 HS1 Head Select 0 HS0 Head Select Select LBA Mode ­ Enabling this bit for commands not supported by LBA mode will abort the selected command. When set, the Task File register contents are defined as follows for the Read/Write and translate command: CONTENTS Sector Number Cylinder Low Cylinder High Drive/Head LBA BITS 0-7 8 - 15 16 - 23 24 - 27 Drive Select ­ Set to 0 to select the master drive; set to 1 to select the slave drive. Head Select ­ Specifies the binary coded address of the head to be selected. Status Register Contains results of the last command executed, and the drive's status. The other seven Task File registers may be read only when bit 7 (BUSY) of the Status register is low. Reading any of the Task File registers when BUSY is high returns the value of the Status register. Reading the Status register also clears any interrupt request to the host. Bit definitions follow: 7 BUSY Controller Busy 6 DRDY Device Ready 5 DF Device Fault 4 DSC Device Seek Complete 3 DRQ Data Request 2 0 1 0 0 ERR Error Controller Busy ­ Goes active when a command is written to the Command register, indicating controller task execution. Device Ready ­ Indicates that the drive is ready for commands. If drive ready is not present, all commands abort. Device Fault ­ Indicates the drive's detection of a write fault condition, causing all commands to abort. Device Seek Complete ­ Signifies a seek completion, and that the drive is on track. Data Request ­ Indicates that the drive's sector buffer is ready for data transfer. Error ­ The Error bit sets when the previous command has completed with a non-recoverable error. 6 ­ 35 HOST SOFTWARE INTERFACE Command Register Contains code for the command to be performed. Additional command information should be written to the task file before the Command register is loaded. [. . . ] If any warranty failure threshold is exceeded, the drive is declared to have a negative health status. Executing this sub-command results in all attribute values being saved to non-volatile storage on the device. DBh Enable/Disable Automatic Off-Line To enable this feature, set the Sector Count register to F1h or 0 to disable. DAh 7 ­ 53 SERVICE AND SUPPORT SECTION 8 Service and Support Service Policy Repairs to any DiamondMaxTM 1750 drive should be made only at an authorized Maxtor repair facility. [. . . ]