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Increase the storage	Specify the number of disks to add and click Save and Close. The spare disks from the default disk group are added to all the RAID groups of the aggregate.
Specify which disks to use when increasing storage	a. Click Advanced, and select a disk group from the Advanced Disk Selection window. The minimum hot spare rule is applied to the disk group that has the largest disk size. The disk count displayed in the Advanced Disk Selection window does not include the hot spare. b. Specify the RAID group to which you want to add the disks. You can add disks to all RAID groups or a specific RAID group, or create a new RAID group and add the disks. • For HDDs, you cannot add disks to all RAID groups if all the parity disks of the aggregate are not equal in size (within a ten percent tolerance range). You should create a new RAID group to add the disks, or specify an existing RAID group. • If you select a disk group with a disk size that is smaller than the selected RAID group parity disk's size, a warning message indicating a suboptimal configuration is displayed. You must select a disk group with a disk size that is the same as the size of the selected RAID group parity disk to create an optimal aggregate. • If you select a disk group with a disk size that is larger than the selected RAID group parity disk's size, a warning message indicating a downsized configuration is displayed. You must select a disk group with a disk size that is the same as the size of the selected RAID group parity disk to create an optimal aggregate. c. Specify the number of disks to add. d. Click Save and Close.