Dell PowerVault LTO4-120HH Dell DR Series System Administrator's Guide - Page 13

• 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 Available Physical Capacity (Decimal) Available Physical Capacity (Binary) 3 TB (DR4100 system only) 26.79 TB 23.8 TiB 2 TB 17.9 TB 15.9 TiB 1 TB 8.89 TB 7.9 TiB 600 GB 5.29 TB 4.6 TiB 300 GB 2.47 TB 2.2 TiB For more general information about the external data storage capacity supported by the expansion shelf enclosures, see the "DR Series Expansion Shelf" section in DR Series System and Data Operations. 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 Adding a DR Series System Expansion Shelf, Installing an Expansion Shelf License, and DR Series System - Expansion Shelf Cabling. Table 2. External Drive Capacity and Available Physical Capacity DR Series System Drive Capacity Available Physical Capacity (Decimal) Available Physical Capacity (Binary) 1 TB 8.89 TB 7.9 TiB 2 TB 17.89 TB 15.9 TiB 3 TB 26.79 TB 23.8 TiB 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 13