Modifying controller settings

Procedure
  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:

    Setting

    Description

    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.

    Unconfigured physical drive write cache state

    Enables or disables the write cache on all unconfigured physical drives. Options are Enabled, Disabled, or Default.

  3. Click Submit changes.