User Manual

Advanced Functions
5-41
• Delete unused logical disks to release free space (Section 2.6.4
Logical disks)
• Delete unused volumes to release free logical disks (Section 2.6.5
Volumes)
• Expand a disk group by adding hard disks to it (Section 2.7.1
Expanding disk groups)
• Shrink under-utilized logical disks to release free space (Section 2.7.5
Shrinking logical disks)
• Shrink under-utilized volumes to release free logical disks (Section
2.7.7 Shrinking volumes)
The firmware utilities below allow you to manage or utilize free disk space:
• Create logical disks using free space on a disk group (Section 2.6.4
Logical disks)
• Create volumes using one or more free logical disks (Section 2.6.5
Volumes)
• Defragment a disk group to merge free chunks into one (Section
2.7.2 Defragmenting disk groups)
• Expand over-utilized logical disks with free chunks (Section 2.7.4
Expanding the capacity of logical disks in a disk group)
• Expand over-utilized volumes with free logical disks (Section 2.7.6
Expanding volumes)
• LUN resizing (capacity expansion/shrink) procedures
The resizing of a logical disk or volume changes the usable capacity of a
LUN. The LUN capacity change is made effective after the background
task is done for logical disk expansion, and it is effective immediately after
your UI operation for other resizing utilities (expanding volumes and
shrinking volumes/logical disks).
To ensure your host can properly recognize and utilize the expanded
space, please follow the steps below in order:
(1) Expand a logical disk or a volume by the firmware utility
(2) Wait till the background task is done (for logical disk expansion only)
(3) Rescan the physical drives by your operating system utility
(4) Expand the partition on the LUN by your partition editor
(5) Expand the file system on the expanded partition by your file system
utility
To ensure your host can properly recognize and shrink the corresponding
space without data loss, please follow the steps below in order:
(1) Ensure enough unused space in the file system of a partition
(2) Shrink the file system on the partition by your file system utility