Quantum DLT 2000, Руководство по эксплуатации продукта

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DLT2000 SCSI Interface
DLT2000/DLT2700 Cartridge Tape Subsystem 8-61
8.4.9.8 Read/Write Error Recovery Page (01h)
The drive shall support the Error Recovery Page which has the following format:
Bit
7 6 5 4 3 2 1 0
0 PS (0)
Additional Page Length (0Ah)
rsvd rsvd EER PER DTE DCR
Byte Read Retry Count
Page Code(01h) 0
1
rsvd TB
Write Retry Count
Reserved
2
Reserved
3
Reserved
4
Reserved
5
Reserved
6
Reserved
7
Reserved
8
9
10
11
Figure 8-38 Error Recovery Page Format
In this page, only the Post Error (PER) flag parameter is changeable. If PER is set,
Check Conditions will be created, with Sense Key of Recovered Error, and VU Sense
Data detailing the cause. Normally, these events should be rare, and only occur if the
recovered write or read retry rates reach excessive levels.
Option Flags
•
TB - The Transfer Block (when not fully recovered) function is not supported.
•
EER - The Enable Early Recovery function is always enabled.
•
PER - The Post Error bit turns on reporting of Check Condition to report recovered
read/write errors. The default setting of this bit is zero.
•
DTE - The Disable Transfer on Error feature is not supported so this bit must be
zero.
•
DCR - The Disable ECC Correction bit feature is not supported so this bit must be
zero.