Fujitsu MBA3300RC, MBC2036RC, MBC2073RC, MBA3147RC, MBA3073RC specifications Command Specifications

Command Specifications

The microcode or control information is written to the logical unit buffer starting at the location specified by the BUFFER Address field. If the HDD is unable to accept the specified buffer address, it shall return CHECK CONDITION status and it shall set the sense key to ILLEGAL REQUEST [=5] with an additional sense code of INVALID FIELD IN CDB [=24-00].

The "Transfer Byte Length" field specifies the maximum number of bytes that shall be present in the Data-Out Buffer to be stored in the specified buffer beginning at the buffer offset. The INIT should attempt to ensure that the parameter list length plus the buffer offset does not exceed the capacity of the specified buffer. (The capacity of the buffer may be determined by the BUFFER CAPACITY field in the READ BUFFER descriptor.) If the BUFFER Address and Transfer Byte Length fields specify a transfer in excess of the buffer capacity, the HDD shall return CHECK CONDITION status and shall set the sense key to ILLEGAL REQUEST [=5] with an additional sense code of INVALID FIELD IN CDB [=24-00].

(7) Mode = 0, 1, 1, 1 : Microcode Download with offset, with saving

In this mode, the microcode of the controller, as a whole or after being divided into multiple parts, is transferred to the data buffer with one or multiple commands. When the entire microcode is transferred to the buffer by using the commands for this mode, the transferred microcode is saved in the FLASH-ROM of the media device, and the microcode restarts the device.

When the last part of the microcode data is transferred and the complete and correct microcode is received in the buffer, the HDD saves the microcode in the FLASH-ROM. If it has been saved correctly, the HDD restarts itself using this microcode. After the successful reboot of the HDD, this command is completed with the GOOD status. At this time, the HDD generates the UNIT ATTENTION condition (UNIT ATTENTION [6]/ Microcode has been changed [3F-01]) for all the INITs except the one that has issued this command.

If the HDD is in the Not Ready state (i.e., the spindle motor is not rotating) when the HDD determines that the microcode can be downloaded, this command terminates with the CHECK CONDITION status (NOT READY [02- 04]/Additional Sense Code indicating the NOT READY state/Additional Sense Code Qualifier [= 04/xx]).

Other behavior is the same as when Mode = (0, 1, 1, 0).

During downloading of microcode, the supply of power to the drive must not be cut off (such as an instantaneous power failure). If a power failure occurs, for instance, while downloading the microcode to the FLASH-ROM, the HDD may be severely damaged. The worst-case scenario in this event would be an inoperable drive.

268 C141-C013