Quantum DXi4701, User Manual

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Chapter 1: DXi4701 System Description
Hard Drive Storage
Quantum DXi4701 User’s Guide 13
By making use of high speed drives, the DXi4701 greatly reduces the
time required for backup/restore functions and improves confidence in
completing the backup in the time allowed.
DXi Usage Scenarios
DXi storage presentations are optimized for backup usage rather than
file sharing. Backup application usage is typically characterized by:
• Aggregated name spaces and file contents.
• Limited direct, active file access.
• Limited browsing, scanning, or stating.
• Limited metadata manipulation (including rename).
Usage diverging from these characteristics must be qualified to ensure
acceptable behavior with respect to functionality, performance,
replication, and recovery.
Note: Using Backup Exec with GRT (Granular Recovery Technology)
over CIFS is not recommended usage. GRT requires frequently
overwriting portions of and appending data to existing files,
which is inconsistent with the DXi usage scenarios. Instead,
Quantum recommends using OST.
HDDs
Depending on the configuration, the DXi4701 Node supports 6 or 12
high capacity (4 TB) hard disk drives (HDDs) (see Figure 2 ). The Node
hard drives are used for the operating system, system software, and
indexes needed for data deduplication, replication, space reclamation.
The DXi4701 Expansion modules (JBODs) each support 12 high capacity
(4 TB) hard disk drives (see Figure 3 ). The Expansion module hard drives
are used for data storage.
All hard disk drives are mounted and pre-assembled in drive carriers (see
Figure 4 ). All drives are hot swappable.