Mode Page 01 (Read/Write Error Recovery Parameters); Table 77. Mode Page 01 (Vendor Unique Parameters) - Hitachi HUS151473VL3800 - Ultrastar 73.4 GB Hard Drive Specifications

17.10.3 Mode Page 01 (Read/Write Error Recovery Parameters)

Table 77: Mode Page 01 (Vendor Unique Parameters)
Byte
0
1
2
3
4
5
6
7
8
9
10
11
The Read-Write recovery parameters that will be used during any command that performs a read or write operation to the
medium are as follows:
• AWRE, an Automatic Write Reallocation Enabled bit, set to zero indicates that the drive shall not perform automatic
reallocation of defective data blocks during write operations. An AWRE bit set to one indicates that the drive shall
perform automatic reallocation of defective data blocks during write operations.
• ARRE, an Automatic Read Reallocation Enabled bit, set to zero indicates that the drive shall not perform automatic real-
location of defective data blocks during read operations. ARRE bit set to one indicates that the drive shall perform
automatic reallocation of defective data blocks during read operations.
• TB, a Transfer Block bit, set to one indicates that a data block that is not recovered within the recovery limits specified
shall be transferred to the Initiator before Check Condition status is returned. A TB bit set to zero indicates that such
a data block shall not be transferred to the Initiator. Data blocks that can be recovered within the recovery limits are
always transferred regardless of the value of the bit.
• RC, a Read Continuous bit, set to one requests the Target to transfer the entire requested length of data without adding
delays that would increase or ensure data integrity. This implies that the Target may send erroneous data. This bit has
priority over all other error control bits (PER, DTE, DCR, TB). RC set to zero indicates normal interpretation of
PER, DTE, DCR, and TB values. The RC bit setting is used by the Target when reporting errors associated with the
transfer of the Initiator's data for the following commands:
- READ (6)
- READ (10)
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.
7 6
PS 0
AWRE ARRE TB
Data Strobe Offset Count (Ignored)
(MSB)
Hitachi Ultrastar 15K147 SCSI Hard Disk Drive Specification
Bit
5 4 3
Page Code = 01h
Page Length = 0Ah
RC EER=0
Read Retry Count
Correction Span
Head Offset Count (Ignored)
Reserved
Write Retry Count
Reserved
Recovery Time Limit
114
2 1 0
PER DTE DCR
(LSB)
Default
81h
0Ah
C0h
01h
00h
00h
00h
00h
01h
00h
00h