NOTE: The 300 Gigabyte (GB) drive capacity (2.7 TB) version of the DR Series system does not support the additionof expansion shelf enclosures.NOTE: If you are running a DR Series system with an installed release of system software prior to 2.1, and youintend to upgrade to release 3.x system software and add an external expansion shelf (or shelves), Dellrecommends that you observe the following best practice sequence of operations to avoid any issues:• Upgrade the DR Series system with the release 3.x system software• Power off the DR Series system• Connect the external expansion shelf (or shelves) with cabling to the DR Series system• Power on the external expansion shelf (or shelves)• Power on the DR Series systemNOTE: If you install an expansion shelf enclosure to support a DR Series system, each shelf must use physicaldisks that have a capacity equal to or greater than each DR Series system internal drive slot capacity (0–11) thatthey are supporting.Figure 2. DR Series System Expansion Shelf (MD1200) Drive Slot LocationsDrive 0 (top) Drive 3 (top) Drive 6 (top) Drive 9 (top)Drive 1 (middle) Drive 4 (middle) Drive 7 (middle) Drive 10 (middle)Drive 2 (bottom) Drive 5 (bottom) Drive 8 (bottom) Drive 11 (bottom)Understanding About Adding a DR Series Expansion ShelfThe process for adding an expansion shelf requires the following:• Physically adding or installing the expansion shelf (for more information, see Adding a DR Series System ExpansionShelf)• Cabling the expansion shelf to the DR Series system (for more information, see DR Series System - Expansion ShelfCabling)• Installing the license for an expansion shelf (for more information, see Installing an Expansion Shelf License)Supported Software and HardwareFor a complete list of the latest supported software and hardware for the DR Series system, Dell recommends that yousee theDell DR Series System Interoperability Guide at support.dell.com/manuals. For example, theDell DR SeriesSystem Interoperability Guide lists the following supported hardware and software categories:• Hardware– BIOS29
