Hitachi HUS151473VL3800 - Ultrastar 73.4 GB Hard Drive Specifications page 133

• EER, an Enable Early Recovery bit, must be set to zero, indicating that the drive shall use an error recovery procedure
that minimizes the risk of misdetection or miscorrection during the data transfer. Data shall not be fabricated.
• PER, a Post Error bit, is set to one to indicate that the drive reports recovered errors.
• DTE, a Disable Transfer on Error bit, must be set to 0 to indicate that the drive continues the DATA phase upon detection
of a recovered error.
• DCR, a Disable Correction bit, is set to one to indicate that Error Correction Code is not used for data error recovery. A
DCR bit of zero indicates that ECC is applied to recover the data.
• Read Retry Count sets a limit on the amount of DRP passes in which the Target attempts to recover read errors. A value
of zero disables all data recovery procedures. When AVERP bit (Mode Page 0 Byte 6 Bit 6) is zero, a value of non-
zero in Read Retry Count enables all steps of DRP. When AVERP bit is one, the number in Read Retry Count sets the
maximum retry count of DRP.
• Correction Span field specifies the size in bits of the largest data error burst for which data error correction may be
attempted. Any value can be placed in this field, including zero. The drive will always use its default correction capa-
bilities.
• Head Offset Count is not supported by the drive.
Note: Head Offset is implemented in the read error recovery routine. The user cannot modify the offset value.
• Data Strobe Offset Count is not supported by the drive and it is ignored.
• Write Retry Count Write Retry Count sets a limit on the amount of DRP passes in which the Target attempts to recover
write errors. A value of zero disables all data recovery procedures.
• Recovery Time Limit indicates the period in 1 millisecond increments for the maximum recovery time of a single LBA.
The value must be from 40 ms to 65535 ms (65.5 seconds). The granularity of the timer is 50 ms. If an LBA is not
able to be recovered within the limit, a Check Condition will be returned. The Recovery Time Limit will not be
applied when WCE=1. A value of zero disables the timer.
Hitachi Ultrastar 15K147 SCSI Hard Disk Drive Specification
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