Chapter 5: Home Page
Data Reduction Statistics
Quantum DXi4700 User’s Guide 114
Show More Information Description
Free Space The disk space that can be used for new deduplicated or non-
deduplicated data.
Reclaimable Space The disk space that is occupied by outdated deduplicated data
and which will be automatically reused if additional space for
new deduplicated data is needed.
Used Disk Space The disk space that already holds data, including deduplicated
data, system metadata, and data not intended for
deduplication.
Deduplicated Data The amount of data that has been deduplicated.
Data Not Intended for Deduplication The amount of data on DXi that do not have deduplication
enabled.
System Metadata The amount of disk space used for internal operations of the
DXi, including system configuration files as well as temporary
files created during replication, space reclamation, and
healthchecks.
Click an item to view detailed statistics for disk usage (see Disk Usage on page 168).
Data Reduction Statistics
The Data Reduction Statistics overview on the Home page (see Figure 80 below) displays the following
information about the results of data reduction:
Figure 80: Data Reduction Statistics Overview
Data Reduction Information Description
Data Size Before Reduction The original, native size of all data that has been processed by the data
deduplication and compression engines.
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