For links and interfaces common to all Express Configuration links, please see Express Overview in ACU help.
On this screen you will be asked what you would like to do with your unassigned physical drives. You have two options:
This radio button will add unassigned drives to existing arrays and creates new logical drives in those arrays.
This option allows you to add the unassigned physical drives to existing arrays to expand their capacity. Expanding an array gives you more usable disk space because less space is used for parity on RAID 4 and RAID 5, though multiple logical drives on an array can decrease performance.
This option is disabled if capacity expansion is not possible. The following conditions prevent capacity expansion:
- The controller does not support capacity expansion
- The controller does not have a battery-backed cache
- The battery-backed cache is not fully charged
- The battery-backed cache is disabled
- The controller has been enabled as an Online Recovery Server controller
- The controller has unassigned physical drives that are not within 10% of the size of physical drives that are on existing arrays
- The controller has one or more arrays with one or more failed physical drives
- The controller has one or more arrays with a failed spare
- Capacity expansion, extension, migration, or a rebuild is currently in progress on the controller
- The controller does not have any saved logical drives to expand
- There are already 32 logical drives on the controller
- There are 14 or more physical drives assigned to any array with one or more RAID 5 logical drives
This radio button uses unassigned physical drives to create new arrays and new logical drives. In addition, if there is unused space on any existing arrays it will also be used to create new logical drives.
This option allows you to create one or more arrays from the unassigned physical drive(s) found on this controller. Keep in mind that more space is required for parity information in a RAID 4 or RAID 5 configuration.
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