# Understanding creating spanned arrays

Notes:
  1. Spanned arrays are supported only by IBM ServeRAID-4 Ultra160, ServeRAID-5i Ultra320, and ServeRAID-6M Ultra320 SCSI controllers.
  2. This feature is not supported on the integrated RAID controller.

When you group one or more arrays together and configure the ServeRAID controller to access them in a particular pattern, you create a spanned array.

Spanned arrays are used to create logical drives using as many as 60 physical drives. The ServeRAID controller supports RAID level-00, 10, 1E0, and 50.

## More information

- Creating spanned arrays in the wizard
- Understanding RAID level-x0
- Understanding when RAID level-x0 logical drives change state
- Understanding creating basic arrays
- Physical drive capacity and unusable capacity

Glossary | Contents

x-1019-SRM-00-04-EN