IBM FlashSystem 840 Product Guide
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Figure 3 shows the components of IBM FlashSystem 840 from the rear. One of the two canisters is
removed, and you see two interface cards and two fan modules. The power supply unit to the right of the
fans provides redundant power to the system. All components are concurrently maintainable except for
the midplane, enclosure LED board, and power interposer board. All external connections are from the
rear of the system.
Figure 3. Rear view of FlashSystem 840 with one canister removed
FlashSystem 840 contains two canisters. Each canister contains a RAID controller, two interface cards,
and a management controller with an associated Ethernet port and a USB connector.
Figure 4 shows a rear view of FlashSystem 840 with Fibre Channel (FC) or Fibre Channel over Ethernet
(FCoE) interfaces. The canisters are to the left (large units) and the two power supply units are to the right
(small units).
Figure 4. Rear view with Fibre Channel interface cards
