Modifying controller settingsModifying controller settings
ProcedureProcedure
1. From the System Utilities screen, select System Configuration >
controller
> Configure Controller Settings > Modify Controller
Settings.
2. In the Modify Controller Settings screen, modify any of the following settings:
SettingSetting DescriptionDescription
Cache Ratio (Read) Adjusts the amount of memory for read-ahead cache versus write cache.
Range is from 0-100; value can be increased or decreased in increments
of 5.
Configured Physical Drive Write Cache State Enables or disables the setting for the write cache on all configured
physical drives.
Options are Enabled, Disabled, or Default.
Current parallel surface scan count Controls how many controller surface scans can operate in parallel:
1: Disabled
16: Maximum
No Battery Write Cache Enables or disables write cache when the energy pack is not present or
not charged.
Options are Enabled or Disabled.
Rebuild priority Determines the urgency with which the controller treats an internal
command to rebuild a failed logical drive.
Low: Normal system operations take priority over a rebuild.
Medium: Rebuilding occurs for half of the time, and normal system
operations occur for the rest of the time.
Medium high: Rebuilding is given a higher priority over normal
system operations.
High: The rebuild takes precedence over all other system
operations.
Spare Activation Mode Predictive Spare Activation mode activates a spare drive any time a
member drive within an array reports a predictive failure.
Failure Spare Activation mode activates a spare drive when a member
drive within an array fails using fault tolerance methods to regenerate
the data.
Surface Scan Analysis Priority Modifies the amount of delay or idle time of the controller before surface
scan analysis is resumed.
0: Disabled
1-30: Idle with delay
31: High
Transformation priority (Does not apply to NVM Express SmartRAID SW RAID Support). Rate at
which requests from the operating system are processed:
High: Completes as fast as possible at the expense of normal I/O.
Medium: Completes with some impact on normal I/O.
Low: Performs when normal I/O is not occurring.
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