WiebeTech SS8 - Manual (Page 40)

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
.
ProSATA SS8 User Manual
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