Internal Drive Capacity; External Drive Capacity; Data Storage Terminology And Concepts - Dell PowerVault Storage Area Network Administrator's Manual

• DR4100 system—which consists of preinstalled DR4000 system software on an modified Dell R720xd appliance
platform.

Internal Drive Capacity

The capacity values listed in Table 1 represent the internal drive and available physical capacities that have been
adjusted for the associated overhead in the DR4000/DR4100 system releases.
NOTE: In Table 1, the abbreviations TB and GB represents Terabytes and Gigabytes in decimal values, and the
abbreviation TiB represents Tebibytes in binary values. Tebibytes are a standards-based binary multiple of the
byte, a unit of digital information storage.
Table 1. Internal Drive Capacity and Available Physical Capacity
DR Series System Drive Capacity
3 TB (DR4100 system only)
2 TB
1 TB
600 GB
300 GB
For more general information about the external data storage capacity supported by the expansion shelf enclosures, see
the "DR Series Expansion Shelf" section in

External Drive Capacity

The capacity values listed in Table 2 represent the additional storage capacity in the external drives that are available
when you add the supported expansion shelf enclosures to a DR4000 or DR4100 system. Additional data storage can be
added using the expansion shelf enclosures in 1 Terabyte (TB), 2 TB, or 3 TB capacities. For more information on the
expansion shelf enclosures, see
DR Series System - Expansion Shelf
Table 2. External Drive Capacity and Available Physical Capacity
DR Series System Drive Capacity
1 TB
2 TB
3 TB

Data Storage Terminology and Concepts

This topic presents several key data storage terms and concepts that help you to better understand the role that the DR
Series system plays in meeting your data storage needs.
Data Deduplication and Compression: The DR Series system design draws upon a wide variety of data-reduction
technologies that include the use of advanced deduplication algorithms, in addition to the use of generic and custom
compression solutions that are effective across a large number of differing file types. The system uses a concept of
content-awareness where it analyzes data to better learn and understand the structure of your files and data types.
Once this is learned, it uses this method to improve your data reduction ratios while reducing resource consumption on
the host. The system uses block deduplication to address the increasing data growth, and this is well suited to providing
Available Physical Capacity (Decimal)
26.79 TB
17.9 TB
8.89 TB
5.29 TB
2.47 TB
DR Series System and Data
Adding a DR Series System Expansion
Cabling.
Available Physical Capacity (Decimal)
8.89 TB
17.89 TB
26.79 TB
Available Physical Capacity (Binary)
23.8 TiB
15.9 TiB
7.9 TiB
4.6 TiB
2.2 TiB
Operations.
Shelf, Installing an Expansion Shelf
Available Physical Capacity (Binary)
7.9 TiB
15.9 TiB
23.8 TiB
License, and
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