## About Arrays and Trays

Because trays are always configured in pairs for high availability, each high-availability (HA) array configuration contains two controller trays and from zero to four expansion trays, for a total of up to six trays and a maximum of 84 disks per array.

- The number of storage trays that can be installed in a cabinet is limited by the space available in the cabinet and by the array configuration.
- The number of arrays is limited by the number of storage ports available. Each array is connected to a single storage port through a Fibre Channel (FC) port connection on the service panel.
- For an expansion cabinet, the number of arrays is also limited by the number of arrays installed in the base cabinet. In a second expansion cabinet, the number of arrays is limited by the number of arrays in both the first and the second cabinets.

To see the current storage trays, go to the Storage Tray Summary page, as described in Displaying Storage Tray Information.

To see the current storage arrays, go to the Storage Array Summary page, as described in Displaying Array Information.

### Related Topics

- About Conventions for Array Names and IP Addresses
- Managing Storage Arrays
- About Storage Trays