Glossary - HP P2000 Reference Manual

Msa system
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Glossary

CAPI
CHAP
chunk size
compatible disk
dedicated spare
default mapping
drive spin down (DSD) A power-saving feature that monitors disk activity in the storage system and spins down
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.
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

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