Verification ensures that all storage is attached and functioning. All storage devices must be connected and functioning before you can allocate them. If you allocate a pool with missing or failed devices, you will not be able to add the missing or failed devices later.
In a system without attached storage, all available drives are allocated by default. In an expandable system, disk shelves are displayed in a list along with the head node, and allocation can be controlled within each disk shelf. This may operate differently depending on the model of the head node or disk shelf.
You can select the following:
Device size - Filters Data devices by logical size. By default, Any displays all available data devices.
Data devices - Displays all available data devices, or the available number of the selected device size.
The number of disks allocated by default depends on the following:
The maximum number available - when the attached storage only contains devices with the same size and rotational speed, or when one size is selected among multiple sizes
None - when the attached storage contains a mixture of rotational speeds.
Note: It is strongly recommended that pools include only devices of the same size and rotational speed to provide consistent performance characteristics.