Quantum DXi4701, User Manual

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Chapter 7: DXi4701 Status
Disk Usage
Quantum DXi4701 User’s Guide 181
• Data After Reduction
Available
Available space is the area that is available for data storage. The
Available value is displayed as an amount and as a percentage of the
total capacity in the system.
Available space is divided into the following categories:
• 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• Reclaimable Space - The disk space that is occupied by outdated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.
Note: For optimal system performance, Quantum recommends
keeping the amount of Available disk space at 20% or more.
Used
Used space is the area that already holds data. The
Used
value is
displayed as an amount and as a percentage of the total capacity in the
system.
Used space is divided into the following categories:
•
Deduplicated Data
- The amount of data that has been
deduplicated.
•
Data Not Intended For Deduplication
- The amount of data that
will not be deduplicated (data on shares or partitions 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.
Data Before Reduction
The Data Before Reduction value represents the original, native size of
all data that has been processed by the data deduplication and
compression engines.
Data before reduction is divided into the following categories: