Seagate Fibre Channel Interface User Manual
Page 233
Fibre Channel Interface Manual, Rev. D
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Correction Span
The size of the largest read data error (in bits) which ECC correction can correct. If errors longer than or equal to 255 (FFh)
bits can be corrected, 255 (FFh) shall be reported in this field.
Data Strobe Offset Count
0
Zero is the default value and is not changeable. This feature is not programmable by the initiator. Data Strobe Off-
sets are performed as part of the disc drive’s retry algorithms.
DCR (Disable Correction)
1
ECC correction will not be applied to the data even if correction is possible.
0
ECC correction will be applied if correction is possible.
DTE (Disable Transfer on Error)
The DTE bit is valid only when the PER bit is set to one.
1
The disc drive terminates data transfer even for recoverable errors (the drive will transfer the data for the recovered
error before terminating the transfer).
0
Data transfer continues if recoverable errors are encountered. Recoverable errors are reported after all data has
been transferred.
EER (Enable Early Recovery)
1
The drive is allowed to apply maximum T level ECC correction on the fly before attempting other retry mechanisms.
Seek error retries are not affected by this bit. Successful correction on the fly is not reported to the host as an error.
0
The drive applies ECC correction before other retry mechanisms, but performs only normal T level ECC corrections
on the fly (normal T level is product specific, but is typically max T - 1). The DCR bit must also be set to 0. Success-
ful correction on the fly is not reported to the host as an error.
Head Offset Count
0
Zero is the default value and is not changeable. This feature is not programmable by the initiator. Head offsets are
performed as part of the disc drive’s retry algorithms.
Page Code
01h
Error Recovery page code.
Page Length
0Ah
The length of the Error recovery page (in bytes). If the allocation length is too small to transfer all of the page, the
page length is not adjusted to reflect the truncation.
PER (Post Error)
1
The disc drive reports Check Condition status and appropriate sense key for any recovered errors encountered.
Reporting of unrecoverable errors has priority over reporting of recoverable errors.
0
Any errors recovered within the limits established by the other Error Recovery Flags are not reported. Any unrecov-
erable errors are reported.
PS (Parameter Savable)
This bit is not used with the Mode Select command.
1
Page 01h parameter data is savable.
RC (Read Continuous)
1
Requests the disc drive to transfer the requested data length without adding delays (for retries or ECC correction)
that may be required to ensure data integrity. The disc drive may send erroneous data in order to maintain the con-
tinuous flow of data. This bit overrides the DTE bit if it is set. RC bit also has priority over EER, DCR, and PER bits.
0
Recovery actions during data transfer are allowed.
Note.
This bit is set to zero (0) and is not changeable in most, if not all, of the drive models covered by this manual. See
individual drive’s Product Manual, Volume 1, section showing changeable values.