Table 1. Internal Drive Capacity and Available Physical CapacityDR Series SingleDrive Capacity 9 Drive Capacity (12DRV RAID6 with HotSpare) (Decimal)9 Drive Capacity (12 DRVRAID6 with Hot Spare)(Binary)Total LogicalCapacity @ 15:1Savings Ratios(Decimal)Total LogicalCapacity @ 15:1Savings Ratios(Binary)3 TB (DR4100 only) 27 TB 24.56 TiB 405 TB 368.4 TiB2 TB 18 TB 16.37 TiB 270 TB 245.55 TiB1 TB 9 TB 8.18 TiB 135 TB 122.7 TiB600 GB (DR4X00only)5.4 TB 4.91 TiB 81 TB 73.65 TiB300 GB (DR4X00only)2.7 TB 2.46 TiB 41 TB 36.9 TiBFor more general information about the external data storage capacity supported by the expansion shelf enclosures, seethe “DR Series Expansion Shelf” section in DR Series System and Data Operations.External Drive CapacityThe capacity values listed in Table 2 represent the additional storage capacity in the external drives that are availablewhen you add the supported expansion shelf enclosures to a DR Series system. Additional data storage can be addedusing the expansion shelf enclosures in the following capacities. For more information on the expansion shelfenclosures, see “Expansion Unit Limits” in theDell DR Series System Interoperability Guide and Adding a DR SeriesSystem Expansion Shelf, Installing an Expansion Shelf License, and DR Series System - Expansion Shelf Cabling in thisguide.Table 2. External Drive Capacity and Available Physical CapacityDR Series SystemDrive CapacityAvailable PhysicalCapacity (Decimal)Available PhysicalCapacity (Binary)Total LogicalCapacity @ 15:1Savings Ratios(Decimal)Total LogicalCapacity @ 15:1Savings Ratios(Binary)1 TB 8.89 TB 7.9 TiB 135 TB 118.5 TiB2 TB 17.9 TB 15.9 TiB 270 TB 238.5 TiB3 TB (DR4100 only) 26.79 TB 23.8 TiB 405 TB 357 TiBData Storage Terminology and ConceptsThis topic presents several key data storage terms and concepts that help you to better understand the role that the DRSeries system plays in meeting your data storage needs.Data Deduplication and Compression: The DR Series system design draws upon a wide variety of data-reductiontechnologies that include the use of advanced deduplication algorithms, in addition to the use of generic and customcompression solutions that are effective across a large number of differing file types. The system uses a concept ofcontent-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 onthe host. The system uses block deduplication to address the increasing data growth, and this is well suited to providingthe best results for routine and repeated data backups of structured data. Block-level deduplication works efficientlywhere there are multiple duplicate versions of the same file. This is because it looks at the actual sequence of the data–the 0s and 1s–that comprise the data.15
