Dell Compellent Series 30 - Manual (Page 234)

226 Storage Center 5.5 System Manager User Guide
System Management
Logical Space Consumed
Under the heading, Logical Space Consumed, the Volume Distribution Report displays:
• Data
• Data Growth
• Replays
• Replay Growth
• Overhead
• Total Logical Space Consumed
The Volume Distribution Report displays logical space consumed by a volume and
additional space this volume is consuming because of the existence of Replays. It details
growth rate trends for both the volume and the associated Replays. Because Replays
contain information about changes that occurred on a volume over time, they take up
space. For example, a volume and all of its Replays might consume 10 GB of space. If all
the Replays were expired, the volume would only consume 8 GB of space. In this case,
the Replay overhead is 2 GB.
Physical Space Consumed
Under the heading, Physical Space Consumed, the Volume Distribution Report displays
physical space:
• Consumed
• Borrowed
• When the displays was last updated
Physical Space Consumed details the physical disk space consumed by a volume and all
associated Replays. If this volume is a View volume related to another volume, it could be
borrowing space from that volume. Borrowed space occurs when a volume shares Replay
space with another volume.