Configuring Arrays on HP Smart Array Controllers Reference Guide

HP Array Configuration Utility 39
Healing an array
The Heal Array operation enables you to enter a command to replace failed physical drives in the array with
healthy physical drives. After replacement, the original array and logical drive numbering is unaffected.
To use Heal Array, you must meet the following conditions:
• The array has at least one failed drive.
• The array is not transforming (for example, rebuilding to a spare).
• The array has a working cache, making it capable of transformation.
• The replacement physical drives and the original drives must be of the same interface type, such as SAS,
SATA, and so on.
• A sufficient number of unassigned physical drives of the correct size are available to replace each failed
physical drive in the array.
The correct size is defined as a drive as large as the smallest drive on the array, but no larger than the
smallest spare.
• If using an HP ProLiant Smart Array G6 or G7 controller, an SAAP 1.0 license is activated.
When you select Heal Array, and all conditions are met, one of the following actions occurs to the volume in
the array:
• If a volume has failed, ACU recreates the volume. This action occurs with a RAID 0 volume.
• If a volume is degraded, ACU rebuilds the volume.
Replacing an array
Some controllers may not support this option or might require a license key to enable the feature.
ACU enables you to transfer the contents of an array to an existing empty array or a new array. During this
operation, all logical drives transfer from the original array to the destination array. The original array is
deleted, and the drives that were being used are freed and listed as unassigned drives.
Replacing an array is a time-consuming process for two reasons: all data in each logical drive is copied to
the destination array, and the controller performs all data transformations while servicing IO requests to other
logical drives.
To perform the Replace Array operation, you must meet the following conditions:
• The destination array must have the same number of physical drives as the source or original array.
• Both the source and destination arrays must be in OK state.
• All existing logical drives in the source array must be in OK state.
• The destination array must have sufficient capacity to hold all logical drives present in the source array.
Diagnostics tasks
The ACU Diagnostics feature replaced the Array Diagnostic Utility supported by SmartStart v8.20 and
earlier. Beginning with ACU v8.70.9, the diagnostics functionality within ACU has expanded and includes
the SmartSSD Wear Gauge.
ACU generates the following reports and logs:
• Array diagnostic report