HP 2000fc Hp StorageWorks 2000 Family Modular Smart Array CLI reference guide - Page 262

cache capacitor pack CAPI channel CHAP chassis chunk size CLI clone controller The location in which data is stored temporarily. There are a variety of cache types. Read cache holds data in anticipation that it will be requested. Write cache holds data written by a client until it can be stored on other (typically slower) storage media such as disk or tape. (SNIA) See also write-back cache, write-through cache. The controller module component that provides backup power to transfer unwritten data from cache to Compact Flash memory in the event of a power failure. Storing the data in Compact Flash provides unlimited backup time. The unwritten data can be committed to the disk drives when power is restored. Configuration application programming interface. The proprietary protocol used for communication between the Management Controller and the Storage Controller in a controller module. A physical path used for the transfer of data and control information between storage devices and a RAID controller or a host; or, a SCSI bus in a controller module. Challenge-Handshake Authentication Protocol. An enclosure's metal housing. The amount of contiguous data that is written to a virtual disk member before moving to the next member of the virtual disk. The default chunk size is 64 Kbyte. The number can be adjusted to improve performance. Generally, larger chunks are more effective for sequential reads. The command-line interface that system administrators can use to configure, monitor, and manage MSA2000 Family storage systems. The CLI is accessible from any management host that can access a controller module through an out-of-band Ethernet or RS-232 connection. A copy of either a master volume or a snapshot. The control logic in a storage subsystem that performs command transformation and routing, aggregation (RAID, mirroring, striping, or other), high-level error recovery, and performance optimization for multiple storage devices. (SNIA) A controller is also referred to as a RAID controller. 262 HP StorageWorks 2000 Family Modular Smart Array CLI reference guide • May 2008