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Installation
5-8 C141-E237
(1) Error recovery parameters
The following parameters are used to control operations such as HDD internal error recovery:
a. Read/write error recovery parameters (page code = 1)
Parameter Default value
• AWRE:
• ARRE:
• TB:
• EER:
• PER:
• DCR:
Automatic alternate block allocation at Write
operation
Automatic alternate block allocation at read
operation
Uncorrectable data transfer to the INIT
Immediate correction of correctable error
Report of recovered error
Suppression of ECC error correction
1 (enabled)
1 (enabled)
0 (disabled)
1 (enabled)
0 (disabled)
0 (Correction is
enabled.)
• Retry count at read operation
• Retry count at write operation
• Recovery time limit
63
63
30 sec
b. Verify error recovery parameters (page code = 7)
Parameter Default value
• ERR:
• PER:
• DTE:
• DCR:
Immediate correction of recoverable error
Report of recovered error
Stop of command processing at successful
error recovery
Suppression of ECC error correction
1 (enabled)
0 (disabled)
0 (Processing is
continued.)
0 (Correction is
enabled.)
• Retry count at verification 63
c. Additional error recovery parameters (page code = 21)
Parameter Default value
• Retry count at seek error 15
Notes:
1. The user can arbitrarily specify the following parameters according to the system
requirements:
• ARRE
• AWRE
• TB
• PER
2. The user also can arbitrarily specify parameters other than the above. However, it is
recommended to use the default setting in normal operations.