Chapter 13. RAS, monitoring, and troubleshooting 675
13.1.1  Node canisters
Two node canisters are contained in the control enclosure that work as a clustered system 
running the IBM Spectrum Virtualize software. Figure 13-1 shows the ports and indicator 
lights of a node canister, with the Front Panel LEDs providing a convenient status summary. 
The second canister is placed next to the first one in a side-by-side configuration. 
Figure 13-1   Ports and indicators of node canister (524 controller model)
Host interface cards
Two host interface card (HIC) slots are vertically placed on the right side of the canister 
complemented by an additional slot for a Compression Accelerator card or a compression 
pass-thru card if the additional compression engine was not purchased. HIC slots can 
accommodate up to 2 dual-port 16 gigabit per second (Gbps) Fibre Channel (FC) cards, or 1 
four-port 10-gigabit Ethernet (GbE) adapter stand-alone or in combination with an FC card. 
The 16 Gbps FC adapter is based on the Emulex Lancer multiprotocol chip, and supports FC 
or Fibre Channel over Ethernet (FCoE) traffic using a single chip (Converged Network 
Adapter). It can be configured as dual-port 16 Gbps FC adapter or as a four-port 10 GbE with 
FCoE support. For FC configurations, the meaning of port LEDs is explained in Table 13-1.
Table 13-1   Fibre Channel link LED statuses
USB ports
Two active Universal Serial Bus (USB) connectors are available in the horizontal position. 
They have no numbers and no indicators are associated with them. These ports can be used 
for initial cluster setup, encryption key backup, and node status or log collection.
Port LED Color Meaning
Link status Green Link is up, connection established.
Speed Amber Link is not up or speed fault.
Battery LEDs
- green: status
- amber: fault
Host Interface CardsCanister LEDs
- green left: power
- green horse-shoe: status
- amber: fault
SAS Indicators
- green: link
- amber: fault
Front panel LEDs