System information

Using the RAID GUI
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2.7.14 Schedule task
The DG reconfiguration, LD reconfiguration, disk cloning, disk scrubbing, and DST scheduled tasks are listed in the
Schedule Task section. When the scheduled date and time is met, the controller will start the specified tasks.
To cancel a scheduled task, select it and click Delete. A confirmation prompt displays. Click Confirm to delete the
selected task.
2.7.15 Cache Configurations
In this section, you can configure the following settings to the controller. The settings of Cache Unit Size, Auto Array
Roaming Control, and Write Log Control will take effect after you restart the RAID subsystem.
2.7.16 Miscellaneous
Note
The controller will try to launch commands according to the schedule. However, if the command
cannot be executed at that moment, the controller will not retry.
Cache Unit Size (KB): 4 / 8/ 16 / 32 / 64 / 128 (default)
The cache unit size must be smaller or equal to the minimum stripe size of existing logical disks.
Read Ahead Expire Control (1/100 second):55 (default)
Specify the read ahead expire control in 1/100 seconds.The range is from 10 to 1000.
Write Cache Periodic Flush (second): 5 (default)
Specify the period in seconds to periodically flush the write cache. If 0 is specified, periodic cache flushing is
disabled. The range is from 0 to 999.
Write Cache Flush Ratio (%): 45 (default)
Specify the dirty write buffer watermark. When the specified percentage is reached, the system will start to flush
the write buffers immediately. The range is from 1% to 100%.
Mirrored Write Cache Control: On (default) / Off
This option is only available on the redundant-controller system. If this option is enabled, all written data from
hosts will be mirrored to the peer controller.
Note
Disable Mirrored Write Cache Control function will improve the write performance, but it will cause
data loss when a controller fails. Do not disable it if you set active-active redundant controller
configuration.
Auto Spare Control: On (default) / Off
If this option is enabled, and there is no global spare disk, unused hard disks are used for rebuilding. If there are
multiple unused disks, the disk with the lowest hard disk identifier will be used.
Spare Restore Control: On / Off (default)
If this option is enabled, the controller will restore the data from the spare disk to a new replacement disk when
inserted. This allows the user to keep the same member disks as original.
Auto Array Roaming Control: On / Off (default)
On: Enable imported foreign hard disks when the controller is started. Foreign hard disk configurations are also
restored.
Off: Disable imported foreign hard disks when the controller is started.