A disk array controller detects whether each drive it is connected to is an ATA drive or a SCSI drive, and communicates with that disk drive using the corresponding protocol. Preferably, the disk array controller supports both the Serial ATA interface specification and the Serial Attached SCSI interface specification, allowing either or both types of disk drives to be included within a RAID or other disk array configuration. The disk array controller may be incorporated into a storage server having hot swap drive carriers that accommodate both types of disk drives.

 
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