IBM Ultrastar 36LZX Specifications page 101

For all other commands, the RC bit setting is unused and treated as zero.
Note: The Target implementation of the RC option is to disable error detection of the data fields but
continue normal error detection and recovery for errors occurring in the servo field. If a servo field
failure occurs, normal DRP could result in considerable recovery action, including proceeding
through all levels of DRP.
Ÿ 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.
Ÿ PER, a Post Error bit, is set to one to indicate that the drive reports recovered errors.
Ÿ DTE, a Disable Transfer on Error bit, is set to one to indicate that the drive terminates the DATA
phase upon detection of a recovered error .
Ÿ 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.
Ÿ 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.
Ÿ Correction Span field specifies the size in bits of the largest data error burst for which data error
correction may be attempted. Any value may be set into this field including zero. The drive will
always use its default correction capabilities.
Ÿ Head Offset Count is not supported by the drive.
Note: Head Offset is implemented in the read error recovery routine. The user can not modify the
offset value.
Ÿ 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. When AVERP bit (Mode
Page 0 Byte 6 Bit 6) is zero, a value of non-zero in Write Retry Count enables all steps of DRP.
When AVERP bit is one, the number in Write Retry Count sets the maximum retry count of DRP.
Ÿ Recovery Time Limit indicates the period in 1 millisecond increments for the maximum command
execution time.The value must be from 40 msec to 65535 msec (65.5seconds). If a command is not
able to be completed within the limit, a check condition will be returned when following mode page
parameters are set.
- ARHES = 0
- AWRE = 0
- ARRE = 0
- WCE = 0
Ultrastar 36LZX hard disk drive specifications
101