The following figure shows an empty Cisco UCS 5108 server chassis and identifies the front, back, and module slots.
Whenever you remove a module from the chassis for an extended period of time, always replace the module with the appropriate blank panel. Failing to do so can result in heating and EMI issues. Blank panels can be ordered from Cisco Systems.
This warning symbol means danger. You are in a situation that could cause bodily injury. Before you work on any equipment, be aware of the hazards involved with electrical circuitry and be familiar with standard practices for preventing accidents. Use the statement number provided at the end of each warning to locate its translation in the translated safety warnings that accompanied this device. Statement 1071
SAVE THESE INSTRUCTIONS
This unit is intended for installation in restricted access areas. A restricted access area can be accessed only through the use of a special tool, lock and key, or other means of security. Statement 1017
Only trained and qualified personnel must be allowed to install, replace, or service this equipment. Statement 1030
You can remove blade server hard drives without removing the blade server from the chassis. All other component replacement for a blade server requires removing the blade from the chassis. Unused hard drive bays should always be covered with cover plates (N20-BBLKD) to assure proper cooling and ventilation. The chassis is omitted from illustrations here to simplify the drawing.
To prevent ESD damage, wear grounding wrist straps during these procedures and handle modules by the carrier edges only.
Figure 4. Positioning a Power Supply in the Cisco UCS Server Chassis
Both grids in a power redundant system should have the same number of power supplies. If your system is configured for grid redundancy, slots 1 and 2 are assigned to grid 1 and slots 3 and 4 are assigned to grid 2. If there are only two power supplies in a redundant- mode chassis, they should be in slots 1 and 3. This would be a very unusual configuration, with a single B200 blade server in the chassis. A larger configuration would require two power supplies per grid. Slot and cord connection numbering is shown below.
Figure 5. Power Supply Bay and Connector Numbering (AC Version Shown)
Removing a Power Supply
If you are using the Cisco UCS 5108 server chassis with one power supply (this is only supported in earlier versions of the system software), removing the power supply will cause the servers and chassis to shut down. If you are using more than two power supplies, and you remove one of them, the servers continue to operate as long as the other power supplies are sufficient to meet the power requirements of the number of servers in the chassis.
Loosen the captive screw on the front of the power supply.
Lift up the power supply’s handle to unseat the power supply.
Using the lever, pull the power supply from its slot. Place your other hand under the power supply to support it while you slide it out of the chassis.
Install a blank power supply filler panel (N20-CBLKP) if the power supply bay is to remain empty.
Installing and Removing a Power Distribution Unit (PDU)
The Power Distribution Unit should only be replaced by a Cisco certified technician. This section is for reference only.
You can not hot swap a PDU (N01-UAC1). The entire chassis will need to be shut down and all power cords should be unplugged before attempting this procedure.
Hold the PDU module from below, with the captive screws at the top of the module.
Figure 6. Positioning a PDU (N01-UAC1) in the Cisco UCS Server Chassis, AC Version
Push the PDU module into the chassis until it seats properly. If power supplies are installed, you may need to partially remove them.
Tighten the captive screws.
If necessary, reseat the power supplies and restart the system to observe LED behavior.
Removing a PDU
Partially remove all installed power supplies. If a power supply is seated into the PDU, removal is difficult or impossible.
Loosen the captive screws.
Pull the PDU clear of the chassis by pulling on the captive screws. Support its weight from below.
Installing and Removing FEXes
The chassis houses two FEXes (Cisco UCS 2104XP, UCS 2208XP, UCS 2204XP) that allow the blade servers in the chassis to communicate with Cisco UCS fabric interconnects. FEXes can have either four or eight I/O ports.
A FEX is sometimes referred to as an “I/OM” or IO Module.
Before you install a pair of UCS 2208XP FEXes to an existing UCS chassis using a pair of UCS 2104XPs, or add a new chassis with a pair of UCS 2208XP FEXes to a UCS instance you must perform a full upgrade to UCS software version 2.0(1) or later. The UCS 2208XP FEX is not recognized by earlier software releases.
Before you install a pair of UCS 2204XP FEXes to an existing UCS chassis using a pair of UCS 2104XPs, or add a new chassis with a pair of UCS 2204XP FEXes to a UCS instance you must perform a full upgrade to UCS software version 2.0(2) or later. The UCS 2204XP I/O Module is not recognized by earlier software releases.
Upgrading from a pair of UCS 2104XP to a pair of UCS 2200 series modules should be done first on the FEX connected to the standby Fabric Interconnect, standby should be made active, then the FEX connected to the new standby Fabric Interconnect can be upgraded.
If you are also performing an upgrade on the fabric interconnects, perform the upgrades separately. Attempting to upgrade both FEXes and fabric interconnects in a single process will likely complicate any reconfiguration needed on the FI ports.
Adding any M3 model blade server may require an upgrade from UCS 2104XP to UCS 2208 series FEXes. M3 blade servers use newer MLOM and adapter card models that are not fully compatible with the older FEX model.
Before you disconnect any data cables, make a record of which FEX ports are connected to which Fabric interconnect ports.
Configurations of 1, 2, 4, or 8 10 GB connections between FEX and Fabric interconnect are supported in UCS. If your UCS 2104XP has 4 physical connections and you want more, the next available upgrade step is the full 8 connections on the UCS 2208XP. You should verify that the FEX upgrade is completed with no problems before adding the connections for ports 5-8.
If you intend to implement the Fabric port channel feature available in UCS software version 2.0, you may need to rearrange the cabling between FEX and Fabric Interconnect before performing the feature configuration. Fabric port channel will require that all physical links from a given FEX physically connect to a contiguous block of ports (1 to 8 or 9 to 16, and so on). This feature requires a Cisco UCS M82-8P Virtual Interface Card in at least one blade server, and the UCS 2208XP FEX. See the Fabric Port Channel sections in the configuration guides for more details.
Removing a FEX
Remove all cables from the FEX.
Loosen the captive screws on the FEX.
Pull the levers outward to unseat the FEX.
Using the levers, pull the FEX from its slot.
Install a blank FEX filler panel (N20-CBLKI) if the FEX slot is to remain empty.
If you plan to remove a FEX for an extended period of time, you must replace it with the N20-CBLKI blank to avoid EMI issues. Blanks can be order from Cisco.
Installing a FEX
Make sure that the two levers at the front of the FEX are pulled open.
Slide the FEX into the chassis slot, ensuring that the FEX is fully seated.
Figure 7. Positioning a 4 Port FEX within the Server Chassis
Figure 8. Positioning an 8 Port FEX within the Server Chassis
Close the levers and tighten the captive screw on each lever.
You can hot swap a fan module (N20-FAN5) without causing an electrical hazard or damage to the system. However, you can only remove one fan module while the system is operating. Removing more than one fan module could cause overheating.
When a fan is removed, louvers inside the chassis prevent recirculation of air into the system or loss of cooling. However, you should not leave the chassis for extended periods of time without all fan modules in place.
Hold the fan module with the spring latch at the top of the module.
Push the fan module into the chassis until it seats properly and the spring latch snaps into place.
Listen for the fans if the chassis is powered on. You should immediately hear it operating. If you do not hear it, ensure that the fan module is inserted completely in the chassis and the faceplate is flush with the outside surface of the chassis.