data path
The route taken by a data packet between a data host and the storage device.
direct attached storage (DAS)
A storage architecture in which one or two hosts that access data are connected physically to a storage array.
disk
A physical drive component that stores data.
E
event
A notification of something that happened on a device. There are many types of events, and each type describes a separate occurrence. See also alarm and alert.
expansion tray
A tray that does not have a RAID controller, used to expand the capacity of an array. This type of tray must be attached to a controller tray to function.
extent
A set of contiguous blocks with consecutive logical addresses on a physical or virtual disk.
F
failover and recovery
The process of changing the data path automatically to an alternate path.
fault coverage
The percentage of faults detected against all possible faults or against all faults of a given type.
FC
See Fibre Channel (FC).
Fibre Channel (FC)
A set of standards for a serial I/O bus capable of transferring data between two ports at up to 100 megabytes/second, with standards proposals to go to higher speeds. Fibre Channel supports point to point, arbitrated loop, and switched
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