Wiebetech SS8 Manuale Utente

 

   

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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. 

Graphical User Interface

 

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 System 

A computer, typically a server or a workstation, which 
operates and monitors the storage system.

 

Logical Unit Number

 

LUN is the identifying number assigned to a UDV that allows the 
host system to distinguish between different UDVs. 

Physical Disk 

The PD refers to the actual hard drive that can be selected to 
be a member of a volume group. 

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  

.