HP XP P9500 Storage - Manual (Page 227)

FICON Fibre Connectivity
flash drive A data drive that uses a solid-state memory device instead of a rotating hard disk.
flash module A high speed data storage device that includes a custom flash controller and several flash memory
sub-modules on a single PCB.
FMD See flash module
HBA host bus adapter
HDD hard disk drive
HDU hard disk unit
head LDEV See top LDEV.
host group A group of hosts of the same operating system platform.
host mode Operational modes that provide enhanced compatibility with supported host platforms. Used
with fibre-channel ports on RAID storage systems.
host mode option Additional options for fibre-channel ports on RAID storage systems. Provide enhanced functionality
for host software and middleware.
in-system
replication The original data volume and its copy are located in the same storage system. Business Copy
in-system replication provides duplication of logical volumes; Snapshot in-system replication
provides “snapshots” of logical volumes that are stored and managed as virtual volumes (V-VOLs).
See also remote replication.
internal volume A logical volume whose data resides on drives that are physically located within the storage
system. See also external volume.
JNL journal
journal volume A volume that records and stores a log of all events that take place in another volume. In the
event of a system crash, the journal volume logs are used to restore lost data and maintain data
integrity.
In Continuous Access Journal, differential data is held in journal volumes on until it is copied to
the S-VOL.
JRE Java Runtime Environment
keypair Two mathematically-related cryptographic keys: a private key and its associated public key.
LBA logical block address
LCP local control port; link control processor
LD local directory; logical device
LDAP lightweight directory access protocol
LDEV logical device
LDKC See logical disk controller (LDKC) .
LDM Logical Disk Manager
license key A specific set of characters that unlocks an application and allows it to be used.
local control port
(LCP) A serial-channel (ESCON) port configured to receive I/Os from a host or remote I/Os from a
Continuous Access Synchronous main control unit (MCU).
local copy See in-system replication.
logical device
(LDEV) An individual logical data volume (on multiple drives in a RAID configuration) in the storage
system. An LDEV may or may not contain any data and may or may not be defined to any hosts.
Each LDEV has a unique identifier or “address” within the storage system composed of the logical
disk controller (LDKC) number, control unit (CU) number, and LDEV number. The LDEV IDs within
a storage system do not change. An LDEV formatted for use by mainframe hosts is called a logical
volume image (LVI). An LDEV formatted for use by open-system hosts is called a logical unit (LU).
logical disk
controller (LDKC) A group of 255 control unit (CU) images in the RAID storage system that is controlled by a virtual
(logical) storage system within the single physical storage system. For example, the Universal
Storage Platform V storage system supports two LDKCs, LDKC 00 and LDKC 01.
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