Product Documentation
Abstract
Learn how to set up and configure the rack for Netfinity 4000R servers.
Content
The Netfinity 4000R is a rack-mounted Web server that is 1U in height. Server racks are marked in vertical increments of 44.45 mm (1.75 inches). Each increment is referred to as a unit, or "U". A 1U device is 44.45 mm (1.75 inches) in height.Cabling
These are general guidelines for cabling the Netfinity 4000R server to its associated hardware.
- To connect the Netfinity 4000R servers in a rack to a console (keyboard, mouse, monitor), perform the following steps:
- Connect each Netfinity 4000R to its console adapter.
- Connect the console adapter to a console selector switch, using a console cable set.
- Connect the console selector switch to the console, using a console cable set. When you have a greater number of servers in the rack than can be connected to one console selector switch, install additional console selector switches and connect the remaining servers to them.
- Connect each of these console selector switches (secondary switches) to a console selector switch for the rack (primary switch), using a console cable set.
- Connect only the primary switch to the console itself.
- Connect an appropriate power cable for each server and each switch to a power distribution unit (PDU).
- Connect each PDU to an appropriate electrical wall outlet for the type of PDU (high-voltage or low-voltage) using the appropriate power cord.
Supported hardware, more detailed cabling information, and one possible configuration are described in this document.
NOTE: How you configure your rack is up to you; this is one possible configuration and some general guidelines.
* Withdrawn - not available for purchase through IBM
Supported hardware
| Supported console selector switches: |
|
| Supported PDUs: |
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| Supported console cables: |
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| Supported power cables: |
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| Supported rack cabinets: |
Footnotes: |
For a complete list of supported hardware, including keyboards and monitors, see the ServerProven list at the following URL: http://www.ibm.com/servers/eserver/serverproven/compat/us/
Typical configuration
Below is a typical configuration of Netfinity 4000R servers in an IBM rack, as viewed from the rear of the rack. The rack side panels have been removed for access; they will be replaced when all cabling is completed. The first group of servers has been cabled to its secondary switch.
| Secondary console selector switch | ||
|---|---|---|
 |  |  |
Note that both ends of every cable have been labeled. Label your cables according to your local conventions. Note also that excess length in the cables has been routed to the side of the rack. Additional cables such as Ethernet, serial, or adapter-card cables should follow the same type of routing as used for the other server cables.
Equipment used in this configuration
 | Rack:
Primary switch:
|
For thermal reasons, the front door has been removed from the rack, and a blank filler panel has been placed on the front of any unused space in the rack.
| Equipment | Space required (in U) | Space available (in U) in the rack |
|---|---|---|
| 42U rack | . | 42 |
| One console tray (keyboard, monitor, and mouse) plus primary switch (switch shares top U of console tray) | 3 | 42 - 3 = 39 |
| One secondary switch for every eight Netfinity 4000R servers | 1 per switch | 39 - 36 = 3 |
| Groups of up to eight Netfinity 4000R servers | 1 per server; up to 8 per group plus 1 secondary switch = up to 9 per group.39 / 9 = 4 groups 4 x 9 = 36 required | 39 - 36 = 3 |
Use the remaining available units in the rack for cable routing. The technique is the same for other racks. For an IBM NetBAY22 rack, the initial space available is 22U; for an IBM Netfinity Enterprise Rack, the number is 42U. If you have other devices in your rack, subtract the number of units they require before calculating how many Netfinity 4000R servers and switches can be installed in the rack.
Connecting the secondary switches to the primary switch
| Each secondary switch must be connected to the primary switch for the rack. The primary switch must be connected directly to the console (keyboard, mouse, and monitor). |  |
Connecting the power cords
| The power cord on each server is connected to a PDU mounted in the side wall compartment of the rack. |  |  |
| The best fit for amperage, outlet, and space requirements is a total of four 10-outlet, 16-amp, high-voltage PDUs for the equipment in this rack. In this configuration, the eight outlets on one side of the PDU are used for the servers; one of the two outlets on the other side of the PDU is used for a secondary switch; the remaining outlet on any of the PDUs can be used for the primary switch or the monitor. For modularity, all eight servers and the secondary switch for a group in this configuration have been plugged into the same PDU. |  |  |
This configuration is in the United States, therefore each of the four PDUs has a line cord with a NEMA L6-20P plug (the type of plug will differ in other countries). In this particular configuration, the line cords are 4.3 m (14 ft.) in length. Each of the four line cords, in accordance with safety requirements, leads to a separate 200-240 V ac source circuit with appropriate emergency power-off controls and a 16-amp circuit breaker.
In addition, the thermal output for this configuration has been calculated in order to determine whether the room air conditioning can handle the new load.
Selecting a server to use the console
For turning on or operating a device, see the documentation that comes with the individual products. For instructions on how to select the server you want to observe with the console, see the documentation that comes with your console server selector switch.
Amperage and outlet requirements
| Device | Number of devices | Outlets needed per device | Outlets needed | Amps at LV | Amps at HV | Total amps LV (Outlets x amps LV) | Total amps HV (Outlets x amps HV) |
|---|---|---|---|---|---|---|---|
| Netfinity 4000R | 32 | 1 | 32 | 2 | 1.5 | 64 | 48 |
| Console selector switch | 5 | 1 | 5 | .8 | .4 | 4 | 2 |
| Monitor | 1 | 1 | 1 | 2 | 1 | 2 | 1 |
| Total | 38 | 70 | 51 |
| Considerations | Calculations |
|---|---|
| At high-voltage, four PDUs supply enough outlets, supply the needed amperage, and supply the needed balance of outlets and amperage. Although ten servers can be plugged into a PDU, requiring three PDUs and two outlets on a fourth for the 32 servers, the servers should be distributed evenly across the PDUs, eight per PDU. The remaining outlets on the four PDUs are sufficient or the five switches and 1 monitor. |
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PDUs can be placed in the rack side walls or in the rack slots. When placed in the rack side walls, the PDUs are usually balanced (one in each side wall pocket, making two PDUs on each side of the rack). In the configuration shown here, the four PDUs were all put on one rack side wall; the other rack side wall was used for cable routing.
Thermal output
Based on information from the Netfinity Rack Configurator , the thermal output (load on the room air conditioning) can be calculated as the sum of (device power consumption x 3.41) x number of devices, for all the devices in the rack.
For this configuration, the calculations are as follows, using maximum device power consumption figures. The average power consumption for a server could be less.
| Device | Device power consumption | Load from one device | Number of devices | Total load these devices | |
|---|---|---|---|---|---|
| Netfinity 4000R | 150 W x 3.41 = | 511.5 | 32 | 16368 BTU/Hr | |
| Console selector switch | 42 W x 3.41 = | 143.22 | 5 | 716 BTU/Hr | |
| Flat panel monitor | 40 W x 3.41 = | 136.4 | 1 | 136 BTU /Hr | |
| Total rack thermal output | 17,220 BTU/Hr | ||||
Document Location
Worldwide
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Document Information
Modified date:
23 January 2019
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