Fujitsu M2488, Руководство по эксплуатации продукта

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TAPE UNIT PARAMETERS M2488 PRODUCT GUIDE
5-4 CG00000-011503 REV. A April 1997
5-2.3 Error Recovery and Reporting Parameters
The Page 01 Error Recovery and Reporting Parameters CDB is illustrated in Table 5-4 and described
in Table 5-5.
The parameters on this page specify the error recovery and reporting parameters that the target uses
when transferring data between the initiator and the target. The parameters on this page do not apply
to message system retries or positioning error recovery procedures.
Table 5-4. Page 01 - Error Recovery and Reporting Parameters
BITS MODE
SENSE
DEFAULT
VALUES
BYTES 7 6 5 4 3 2 1 0
0 PS * Reserved Page Code 81h
1 Additional Page Length 0Eh
2 Reserved TB Reserved EER PER DTE DCR 08h
3 Read Retry Count 10h
4-7 Reserved 00000000h
8 Write Retry Count 10h
9-11 Reserved 000000h
* The PS bit must be set to 0 on a MODE SELECT command.
Note: Changeable fields in this page are shaded.
Table 5-5. Error Recovery and Reporting Parameters Field Description
BYTE BIT VALUE DESCRIPTION
2 0 1
0
When the Disable Correction (DCR) bit is set to one, this bit indicates error correc-
tion is not applied in the course of error recovery. Other normal error recovery oper-
ations are not affected by this bit.
When DCR is set to zero, this bit enables error correction.
The DCR bit is reported as not changeable on a MODE SENSE command, and the
default value is zero.
2 1 1
0
When the Disable Transfer on Error (DTE) bit set to one, and the PER bit is set to
one, the target creates the CHECK CONDITION status and terminates the data
transfer to the initiator immediately upon detection of an error. The transfer length
is then not exhausted. The data of the block in error, which is the first erring block
encountered, may not be transferred to the initiator depending upon the setting of
the TB bit. The DTE bit can only be set to one if the PER bit is set to one. The target
creates the CHECK CONDITION status with an ILLEGAL REQUEST sense key if
PER bit is set to zero and the DTE bit set to one.
When DTE is set to zero, this bit enables data transfer for any data which is recov-
ered within the limits of the error recovery flags. Any erring block that would be
posted, which is the last recovered block encountered, is not posted until the trans-
fer length is exhausted.
The DTE bit is reported as changeable on a MODE SENSE command, and the
default value is zero.