The Storage Summary provides an overview of current storage utilization on the Storage Center.
Status - This indicates the current status of your storage utilization. When the Disk Space Available falls below the Storage Alert Threshold (10%), the Status value changes to Space Low.
Total disk space - This is the amount of raw disk space available.
Used disk space - This is the amount of disk space used by volumes and replays.
Free disk space - This is the amount of disk space still available for use by volumes and replays.
Unhealthy/Bad disk space - This is the amount of space found on any unhealthy disks, or any bad space found on disks that are still considered healthy. This will only appear if unhealthy or bad disk space has been found.
Storage Alert Threshold - This yellow bar represents the Storage Alert Threshold for the disk folder. A warning message will be presented when the amount of disk space available falls below this threshold.
More Details - Click on this link to open the Online Storage view to access additional storage reports.
When disk drives are managed by the Storage Center, they are placed within a disk folder, which is simply a logical grouping of physical drives. Disk folders may contain a mixture of drive types, capacities, and speeds. The total capacity of the disk folder is the sum of the capacities of the drives within the folder. Disk folders may also contain disk drives which are specified as hot spares. These hot spare drives are reserved for use as replacement drives in the event another disk in the disk folder fails. Since the space on these hot spares is never used until another drive fails, their capacity is not included in the total capacity for the disk folder.
The Storage Center allocates disk space from a disk folder for volume and replay use as needed based upon the configurations and IO patterns of each volume.
As the Storage Center approaches the end of the disk space available within the disk folder, you will be notified of the possibility that you could run out of space.
This notification indicates that you are in a Space Low state. The notification occurs when the Disk Space Available value falls below the Storage Alert Threshold (10%).