LSI 3ware 9750 User Manual page 173

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Figure 80. Low Latency Mode with warning when Rate=1
Note:
The Background Task Rate and Background Task Mode settings are only
relevant when there is host I/O activity. When there is no host activity, background
tasks (rebuild/migrate, initialization, and verify) always run at the maximum.
Table 13 provides an overview of the impact of selecting different Task Rate
and Task Mode settings.
Table 13: Selecting Appropriate Background Task Rate and Mode
Rebuild
Your priority
Task Rate
Fastest rebuild time 5
Balanced host I/O 3
and rebuild tasks
Minimized host I/O 2
latency
Minimum host I/O 1
latency
Task
Comments
Mode
Adaptive Potential for higher latency on
host I/Os
Adaptive Default setting
Low Background tasks will complete,
Latency but will be slow when there are
host I/Os
Low Background tasks may never
Latency finish when there are continuous
host I/Os. For example, a rebuild
may never complete.
Background Tasks
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