Fujitsu MBC2073RC Data Block Addressing, Fatal hardware errors, Definition of data space

Command Processing

2.8.6 Fatal hardware errors

(1) Self-diagnostic errors

If a fatal error was detected in the hardware through an initial self-diagnosis, off- line self-diagnosis or on-line self diagnosis (SEND DIAGNOSTIC Command), turning of the spindle motor is stopped.

When in this state, the HDD reports the CHECK CONDITION status for all Input/Output operation requests except the REQUEST SENSE command. The sense data reported at this time shows HARDWARE ERROR [=4]/Diagnostic failure on component "nn" [= 40-nn]. It is necessary for the INIT to generate a RESET condition or sent a TARGET RESET and attempt recovery of the error state. The recommended procedure for error recovery is explained in 6.2, "INIT Error Recovery Methods (Recommended)".

See the SEND DIAGNOSTIC Command and RECEIVE DIAGNOSTIC RESULT Command concerning the self-diagnosis function.

(2) Unrecoverable hardware errors

Limited to cases in which a fatal hardware error occurs during execution of a command, and termination processing such as a CHECK CONDITION status report cannot be executed, the HDD may halt rotation of the spindle motor.

After this state occurs, the HDD reports the CHECK CONDITION status for all input/output operation requests except the REQUEST SENSE command. The sense data reported at this time indicate HARDWARE ERROR [=4] / Internal target failure [=44-nn]. For recommended procedures for error recovery methods, see the explanation in Section 6.2 "INIT's Error Recovery Methods (Recommended)".

2.9 Data Block Addressing

2.9.1 Definition of data space

The HDD divides the data storage area on the disk drive into the following two types of data area and controls them as such.

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User space: user data storage area

System space: HDD exclusive area

Of these two types, the use can clearly gain access to the user space. This space has the same data formatting and defect control methods and it is possible to access it by logical data block addressing, as described in item 2.9.2. The system space is accessed when the power is turned on, or during processing of specific commands, but the user cannot access it directly.

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