4.1 Mode Parameters

Table 4.1 Combinations of error recovery flags (3 of 3)

EER

PER

DTE

DCR

 

Error Recovery Procedure

 

 

 

 

 

 

1

1

0

0

1.

When a correctable data check is detected, immediately, correction is executed

 

 

 

 

 

according to the ECC. For data checks which cannot be corrected, rereading is

 

 

 

 

 

tried repeatedly up to the number of times specified in the "Read Retry Count",

 

 

 

 

 

"Write Retry Count" or "Verify Retry Count" parameter. However, if a

 

 

 

 

 

correctable error is detected during reading, data correction is executed at that

 

 

 

 

 

point according to the ECC.

 

 

 

 

2.

When error recovery has succeeded, processing of the command is continued.

 

 

 

 

3.

If unrecoverable errors have been detected, execution of that command is

 

 

 

 

 

terminated at that point.

 

 

 

 

4.

Transfer of data in blocks which include unrecoverable errors to the INIT is

 

 

 

 

 

done in accordance with the specification in the TB bit (read commands).

 

 

 

 

5.

When recovery from all detected errors has been successful, a CHECK

 

 

 

 

 

CONDITION status (RECOVERED ERROR [=1]) is reported after all

 

 

 

 

 

processing of the command is completed and the sense data indicate the content

 

 

 

 

 

of the last error that was successfully recovered from and the address of the data

 

 

 

 

 

block where that error occurred. However, if the error is corrected with ECC

 

 

 

 

 

only, the CHECK CONDITION is not reported and no sense data is created.

 

 

 

 

 

 

1

1

0

1

 

(Setting prohibited) (See *1 at the end of this table.)

 

 

 

 

 

 

1

1

1

0

1.

When a correctable data check is detected, immediately, correction is executed

 

 

 

 

 

according to the ECC. For data checks which cannot be corrected, rereading is

 

 

 

 

 

tried repeatedly up to the number of times specified in the "Read Retry Count",

 

 

 

 

 

"Write Retry Count" or "Verify Retry Count" parameter. However, if a

 

 

 

 

 

correctable error is detected during reading, data correction is executed at that

 

 

 

 

 

point according to the ECC.

 

 

 

 

2.

When error recovery has succeeded, or even when recovery is impossible,

 

 

 

 

 

execution of the command is terminated with a CHECK CONDITION status at

 

 

 

 

 

the point when error recovery processing is completed, and the sense data

 

 

 

 

 

indicate the data block address where that error occurred.

 

 

 

 

3.

Transfer to the INIT of data in blocks with recovered errors is done, but transfer

 

 

 

 

 

to the INIT of data blocks in which the errors were unrecoverable is done in

 

 

 

 

 

accordance with the specification in the TB bit (read commands).

1

1

1

1

(Setting prohibited) (See *1 at the end of this table.)

*1 If a setting-prohibited combination of error recovery flags is specified, the MODE SELECT or MODE SELECT EXTENDED command is terminated with a CHECK CONDITION status (ILLEGAL REQUEST [=5] / Invalid field in parameter list [=26-00]) and all the parameters specified at that time are disabled.

Remark:

Just as explained for the EER, PER, DTE and DCR bits, the IDD can only make a valid specification for the PER bit. Therefore, among the error recovery flag combinations listed above, the only one which can actually operated is (EER, PER, DTE, DCR) = (1, 0, 0, 0) and (1, 1, 0, 0).

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Fujitsu MAP3367, MAP3147, MAS3735, MAP3735, MAS3367 specifications Combinations of error recovery flags 3, Remark

MAP3735, MAP3147, MAS3367, MAP3367, MAS3735 specifications

Fujitsu, a renowned leader in technology and innovation, has developed a variety of reliable hard disk drives (HDDs) that cater to a wide range of data storage needs. Among these, the MAS3735, MAP3367, MAS3367, MAP3147, and MAP3735 series stand out for their advanced features and exceptional performance.

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