WiebeTech SS8 user manual Appendix C Glossary, Host

W i e b e T e c h L L C

Appendix C: Glossary

CV	Cache Volume
	Cache is memory used to speed up data transfer to and from a
	disk. A Cache Volume is assigned to each UDV for execution of the
	data transaction. Each CV can have different cache memory size.
	Types of Cache Volume:
	Dedicated Cache is a Cache Volume that is assigned to a
	specified UDV.
	Global Cache is a Cache Volume that is shared by all UDVs.
	Degrade mode
	Degrade mode is a status alert on the GUI to show which VG
	has degraded or failed.
GUI	Graphical User Interface
HBA	Host Bus Adapter
	HBA is a device that connects the host system to a storage
	system and allows users to pass and retrieve data on this
	bus.
Host	Host System
	A computer, typically a server or a workstation, which
	operates and monitors the storage system.
LUN	Logical Unit Number
	LUN is the identifying number assigned to a UDV that allows the
	host system to distinguish between different UDVs.
PD	Physical Disk
	The PD refers to the actual hard drive that can be selected to
	be a member of a volume group.
RAID	Redundant Array of Independent Disks
	RAID is a disk array consisting of two or more disks to provide fault
	tolerance and better performance. There are different RAID levels
	with different degrees of the data protection. Please see Appendix
	A.2 for more information on RAID levels and minimum
	requirements.
	Reserved
	This disk was part of a VG and contains data from the VG.
	The reserved status may be caused by removal of drive while
	system was running. In reserved status, this disk can only be
	used to rebuild the VG. To make this disk usable, perform a
	Free Disc by manually selecting the disk and click
	.

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