Glossary - HP 2000i Reference Manual

Glossary

CHAP
chunk size
dedicated spare
default mapping
dual-port disk
dynamic spare
EC
EMP
FC
global spare
host
IQN
iSCSI
iSNS
jumbo frame
leftover
loop
masking
master volume
MC
metadata
network port
point-to-point
SAS
SATA
SC
secret
SES
single-port disk
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 is reserved for use by a specific vdisk to replace a failed disk.
Host-access settings that are configured when a volume is created.
A dual-port disk is connected to both controllers so its data path is fault tolerant.
A properly sized available disk that is automatically assigned, if the dynamic spares option
is enabled, to replace a failed disk in a redundant vdisk.
Expander Controller. The processor (located in the SAS expander in each controller module
and expansion module) that is primarily responsible for enclosure management and SES.
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.
Fibre Channel interface protocol.
A disk that is reserved for use by any redundant vdisk to replace a failed 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.
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 when its metadata says the disk is a member of a vdisk but other
members' metadata say the disk isn't a member. The metadata must be cleared before the
disk can be used in a new vdisk or as a spare.
Fibre Channel Arbitrated Loop (FC-AL) topology.
Volume-mapping settings that specify no access to that volume by hosts.
A volume that is enabled for snapshots and has an associated snap pool.
Management Controller. The processor (located in a controller module) that is primarily
responsible for human-computer interface and computer-computer interface functions, and
interacts with the SC.
Data in the first sectors of a disk drive that stores all disk, vdisk, and volume specific
information including vdisk membership or spare identification, vdisk ownership, volumes
and snapshots in the vdisk, host mapping of volumes, and results of the last media scrub.
The Ethernet port on a controller module through which its Management Controller is
connected to the network.
Fibre Channel Point-to-Point topology.
Serial Attached SCSI interface protocol or disk-drive architecture.
Serial ATA disk-drive architecture.
Storage Controller. The processor (located in a controller module) that is primarily
responsible for RAID controller functions. The SC is also referred to as the RAID controller.
For use with CHAP, a password that is shared between an initiator and a target to enable
authentication.
SCSI Enclosure Services.
A single-port disk is connected to both controllers so its data path is not fault tolerant. A
single-port disk's type is shown as SAS-S or SATA-S.
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