HP P2000 HP P2000 G3 MSA System SMU Reference Guide - Page 151

Glossary CAPI CHAP chunk size compatible disk dedicated spare default mapping drive spin down (DSD) dual-port disk dynamic spare EC EMP explicit mapping FC global spare host image ID IQN iSCSI iSNS jumbo frame leftover loop masking master volume Configuration Application Programming Interface. The proprietary protocol used for communication between the Storage Controller and the Management Controller in a controller module. CAPI is always enabled. Challenge-Handshake Authentication Protocol. The amount of contiguous data that is written to a vdisk member before moving to the next member of the vdisk. A disk that has enough capacity to replace a failed disk and is the same type (SAS or SATA). A disk that is reserved for use by a specific vdisk to replace a failed disk. See compatible disk. Host-access settings that are configured when a volume is created, and that apply to all hosts that are not explicitly mapped to that volume using different settings. See also explicit mapping and masking. A power-saving feature that monitors disk activity in the storage system and spins down inactive SAS and SATA disks, based on user-selectable policies. A disk that is connected to both controllers so its data path is fault-tolerant. An available compatible disk that is automatically assigned, if the dynamic spares option is enabled, to replace a failed disk in a redundant vdisk. See compatible disk. Expander Controller. The processor (located in the SAS expander in each controller module and expansion module) that controls the SAS expander and provides SES functionality. See also EMP. Enclosure management processor. An EC subsystem that provides SES data such as temperature, power supply and fan status, and the presence or absence of disks. Access settings for a host to a volume that override the volume's default mapping. See also default mapping and masking. Fibre Channel interface protocol. A disk that is reserved for use by any redundant vdisk to replace a failed disk. See compatible disk. An external port that the storage system is attached to. The external port may be a port in an I/O adapter in a server, or a port in a network switch. A globally unique serial number that identifies the point-in-time image source for a volume. All volumes that have identical image IDs have identical data content, whether they be snapshots or stand-alone volumes. iSCSI Qualified Name. Internet SCSI interface protocol. Internet Storage Name Service. In an iSCSI network, a frame that can contain 9000 bytes for large data transfers. A normal frame can contain 1500 bytes. The state of a disk that has been automatically excluded from a vdisk, and is no longer needed by the vdisk after the vdisk is reconstructed. Fibre Channel Arbitrated Loop (FC-AL) topology. Volume-mapping settings that specify no access to that volume by hosts. See also default mapping and explicit mapping. A volume that is enabled for snapshots and has an associated snap pool. HP P2000 G3 MSA System SMU Reference Guide 151