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• A system can support up to 1520 drives that are installed into control and expansion enclosures. Each
enclosure requires 2U of rack space.
• Each assembled enclosure weighs more than 36 kg. Provide sufficient space at the front of the rack for
three persons to carry the enclosure safely.
• Each 2U expansion enclosure, including drives, can weigh approximately 29 kg, requiring two persons
to lift. For a single person installation, separate the drives from the enclosure. Installation of the 5U
expansion enclosure requires additional care. For more information, see the following chapter.
• Each system can consist of up to two control enclosures. Each control enclosure can be connected to
up to 20 expansion enclosures (two SAS chains of up to 10 expansion enclosures each).
• For best performance, divide the total number of expansion enclosures to be installed among the
control enclosures in the system.
• Where expansion enclosures are to be installed, distribute them evenly into rack space above and
below the control enclosure to which they are to connect. Do not leave gaps between the enclosures.
Such placement aids cabling and serviceability.
• Leave space in the rack for future expansion enclosures, but otherwise install all enclosures that
constitute one system in adjacent or nearby rack space.
• If a rack is to be only partially filled, install the enclosures low enough for the rack to remain stable and
enable easy access to the enclosures for servicing.
Adding an expansion enclosure chain to an existing system
If you are adding an expansion enclosure chain to an existing system, follow these guidelines.
• You do not need to power off the system. You can add an expansion enclosure while the system is
operational.
• Add the first expansion enclosure directly below the control enclosure.
• Add the second expansion enclosure directly above the control enclosure.
• Add the third expansion enclosure directly below the first.
• Add the fourth expansion directly above the second, and so on.
10 Storwize V5100 : Quick Installation Guide for MTM 2078-424, 2078-12F, 2078-24F, 2078-92F, and 2078-
U5B
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