HP Surestore Disk Array FC60 HP SureStore E Disk Array 12H User's and Service - Page 261

Glossary Glossary Active Hot Spare Adapter An Active Hot Spare is a portion of the disk array capacity reserved to perform a rebuild. An Active Hot Spare ensures that the disk array can maintain Data Redundancy if a disk fails. Until it is needed, the disk array uses the Active Hot Spare space as RAID 0/1 capacity, which improves array performance. An Active Hot Spare does not sit idle; it is used to increase the disk array performance until it is needed. A printed circuit assembly that translates data between the host processor's internal bus and a different bus, such as SCSI. Arbitrated Loop Auto Configuration See Fibre Channel-Arbitrated Loop. Most disk arrays require disk drives to be of matched capacities, performance, and often, manufacturers. A disk array is not restricted to use disks of the same capacity or even performance to function in the array. A process of Auto Configuration permits the Disk Array Controller to recognize and include disks of varying capacity and performance. This means that future disk drives of higher capacity and better performance may be supported for use in the disk array. Auto Failover When two controllers are present, one serves as the Primary Array Controller, and the other becomes the Secondary Array Controller: If either controller fails, the other controller has the ability to assume the role of Primary Array Controller, thus allowing uninterrupted access to all user data with no downtime. Meanwhile, the failed controller can be removed, then replaced by a new array controller, without any downtime, loss of data, or interruption to the host computer system. AutoRAID™ Array Technology AutoRAID™ is a trademark of Hewlett-Packard Company for the disk array product. HP AutoRAID™ implements RAID technology automatically, without requiring you to know all the complexities of determining and setting up different RAID modes. 261