User manual
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Bg rate 
Background task priority. 
“4 / 3 / 2 / 1 / 0”  Æ Default value is 4. The higher 
number the background priority of a VD has, the more 
background I/O will be scheduled to execute. 
Status 
The status of Virtual disk. 
“Online” Æ the Virtual disk is online. 
“Offline” Æ the Virtual disk is offline. 
“Initiating” Æ the Virtual disk is being initialized. 
“Rebuild” Æ the Virtual disk is being rebuilt. 
“Migrate” Æ the Virtual disk is being migrated. 
“Rollback” Æ the Virtual disk is being rolled back. 
“Scrub” Æ the Virtual disk is being scrubbed. 
Health 
The health of Virtual disk. 
“Optimal” Æ the Virtual disk is operating and has 
experienced no failures of the disks that comprise 
the RG. 
“Degraded”  Æ At least one disk which comprises 
space of the Virtual disk has been marked as 
failed or has been plugged. 
“Missing” Æ the Virtual disk has been marked as 
missing by the system. 
“Failed”  Æ the Virtual disk has experienced enough 
failures of the disks that comprise the VD for 
unrecoverable data loss to occur. 
“Part optimal” Æ the Virtual disk has experienced 
disk failures. 
R % 
Ratio of initializing or rebuilding. 
RAID 
The levels of RAID that Virtual disk is using. 
#LUN 
Number of LUN(s) that Virtual disk is attaching. 
Snapshot 
(MB) 
The Virtual disk size that used for snapshot. The 
number means “Used snapshot space” / “Total 
snapshot space”. The unit is in megabytes (MB). 










