User's Manual

220 Storage Center 5.5 System Manager User Guide
System Management
Viewing Disk Space Usage Summary
The Online Storage tab displays various storage summaries, trends, and reports.
Available Storage Summary
The Available Storage Summary displays disk space usage for each disk folder.
1 From the Storage Center View menu, choose Online Storage .
2 Select
Available Storage Summary . The Available Storage Summary window appears.
Figure 183. Available Storage Summary Window
The Storage Summary displays:
• Status : Normal or Disk Low . Disk Low is an indication that you need to add storage.
• Total Disk Space: for each disk folder. Generally there is only one disk folder. Total Disk
Space displays the sum of all disk drives in each disk folder. A disk folder is a logical
grouping of physical drives with similar page sizes and redundancy. Disk folders can
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 also contain
spare drives, reserved to replaced a failed drive. Because space on a spare drive is not
used until another drive fails, its capacity is not included in the total capacity for the disk
folder.
• Total Space Allocated for Volume Use : (total space minus overhead)
• Allocated Space Used by Volumes : Storage Center allocates disk space based upon the
configurations and IO patterns of each volume. As more space is used, Storage Center
allocates additional space. When the system has no more space to allocate, it alerts you
via the Alert Monitor.
• Free Allocated Space : allocated by the system to be used when needed