Administrator Guide

Table Of Contents
Status Information
The top portion of the Status plugin displays information about disk space usage.
NOTE: The information displayed varies with the Storage Center version.
Disk Space
DiskTotal amount of raw disk space on all drives in the Storage Center.
SpareAmount of space distributed across all drives that is reserved for balancing drive usage and recovering from a drive
failure. For Storage Center version 7.3 and earlier, this value will appear as zero, because a hard drive is dedicated to spare
space usage.
Available Space
AvailableAmount of space allocated for volumes on the Storage Center. Calculated as:
Storage Center version 7.4.10 and laterUsed space + Free space
Storage Center versions 7.3-7.4.2Allocated + Free space
FreeAmount of disk space available for use by a Storage Center. Calculated as:
Storage Center version 7.4.10 and laterStorage Type Free space + Disk Free space
Storage Center versions 7.3-7.4.2Free space = Disk Free space
UsedAmount of configured space used by the Storage Center plus RAID overhead. The calculation includes used space on
different objects, depending on the Storage Center software version and the use of hot spares versus distributed spares:
Version 7.4.10 and latersum of all used space for each Storage Type.
Earlier versionscombination of the sum of used space on hot spares, distributed spares, and Storage Type, depending
on the system configuration.
Configured SpaceTotal amount of space available on all of the configured volumes in the Storage Center. Calculated as:
Storage Center version 7.4.10 and laterConfigured space is equal Total space
Storage Center version 7.2 and earlier, Configured space is equal to Available space
Allocated SpaceAmount of disk space allocated on the disks for volumes plus RAID overhead. (Not used in Storage Center
versions 7.1 or 7.2).
Storage Alert ThresholdRemaining disk space percentage that causes a storage alert to occur.
System Data Efficiency RatioRatio that indicates the efficiency of compression, deduplication, RAID, and Thin Provisioning.
System RAID Overhead RatioThe RAID overhead ratio for the entire system calculated using the RAID overhead from the
existing storage types.
Estimated Usable SpaceCalculation of the free space that is usable based on the current usage of the system.
Alert Information
The top portion of the Status plugin displays information about the alerts for a Storage Center.
The alert icons indicate the highest active alert level.
Alert Icon
Description
Indicates no unacknowledged alerts for a category
Indicates that the highest unacknowledged alert level is Warning
Indicates that the highest unacknowledged alert level is Error
The following types of alerts are summarized on the Status plugin.
Alert Type
Description
Current Alerts Displays the total number of Storage Center alerts and the number of alerts for the
each of following categories:
Storage Alerts
Disk Alerts
Hardware Alerts
System Alerts
Viewing Storage Center Information 303