Requirements and guidelines for completing the hardware location chart

The hardware location chart represents the rack into which the SAN Volume Controller nodes are installed. Each row of the chart represents one Electronic Industries Alliance (EIA) 19-inch rack space.

When you design the rack for SAN Volume Controller, use the hardware location chart to record the physical configuration of your system.

Note: These guidelines assume that all SAN Volume Controller nodes are being installed in the same rack. Some systems are designed with the nodes in an I/O group split between two locations to better match the availability requirements of the attached systems. Some of these guidelines are not applicable for these systems.

Follow these steps to download the hardware location chart:

Go to the following website: www.ibm.com/support.
Under Support shortcuts, click Plan and install documentation.
In the search box, type and search for IBM System Storage SAN Volume Controller Planning Information; then click the search result.
Click the link that you want to download the chart to your computer.

When you complete the information in the hardware location chart, consider these requirements:

Do not exceed the maximum power rating of the rack and input power supply.
Each SAN Volume Controller 2145-CG8 or 2145-CF8 node is one EIA unit high. Each SAN Volume Controller 2145-DH8 and SAN Volume Controller 2145-SV1 is two EIA units high. Therefore, for each SAN Volume Controller node that is to be installed, complete the row (or rows) that represents the position that the SAN Volume Controller node is to occupy.
The 2145 UPS-1U for SAN Volume Controller 2145-CG8 or 2145-CF8 is one EIA unit high. Therefore, for each 2145 UPS-1U, complete one row. SAN Volume Controller 2145-DH8 and SAN Volume Controller 2145-SV1 do not use a 2145 UPS-1U.
The redundant AC-power switch is one EIA unit high. Therefore, for each redundant AC-power switch for SAN Volume Controller 2145-CG8 or 2145-CF8 models, complete one row. SAN Volume Controller 2145-DH8 and SAN Volume Controller 2145-SV1 do not use redundant AC-power switches.
If there are any hardware devices already in the rack, record this information on the chart.
Complete rows for all other units that will be present in the rack, including Ethernet hubs, Fibre Channel switches, and Fibre Channel over Ethernet switches. Hubs and switches are usually one EIA unit high, but check with your supplier.
A clustered system can contain no more than eight SAN Volume Controller nodes.
Consider the depths of the different components when you place them in the rack. Ensure you can access the rear ports of all components by not placing them between deeper components. The SAN Volume Controller nodes are deeper than the uninterruptible power supplies, which are themselves deeper than the redundant ac-power switch. The suggested practice is to position all the SAN Volume Controller nodes together; all the uninterruptible power supplies together; and all the redundant ac power supplies together.
Install the SAN Volume Controller nodes in pairs to provide redundancy and concurrent maintenance. Each pair is called an IO Group; position the two nodes in an IO Group next to each other in the rack.
The IBM® service representative does not install the Ethernet hub, the Fibre Channel switches, or the Fibre Channel over Ethernet switch. You must arrange for Ethernet hub, the Fibre Channel switch or the Fibre Channel over Ethernet switch suppliers, or someone in your organization, to install those items. Provide the installer with a copy of the completed hardware location chart.
Ensure that the rack does not become top heavy. Check the guidelines that are provided with the rack. Position heavier components at the bottom of the rack.

In addition to the requirements for completing your information in the hardware location chart, consider also the following guidelines and recommendations.

Place SAN Volume Controller nodes so that information on the display screen is easily viewed and so that the controls that are used to navigate the display menu are easily reached. Place SAN Volume Controller nodes in EIA units 11-36 for ease of access.
Place the 2145 UPS-1Us, in a group, directly below the 2145 nodes. Do not place the 2145-1Us between 2145 nodes, as the sockets will not be accessible.
Place any optional redundant ac-power switches together in a group. Do not place them between 2145 UPS-1Us, or between 2145 nodes, as the sockets will not be accessible.
If it is possible without making the rack unstable, place the redundant AC-power switches below the uninterruptible power supplies, which are underneath the nodes. This placement allows the cables to be arranged in a tidy manner.
Leave some unused locations in the rack, and remember to add filler panels to unused locations. The redundant AC-power switches have sockets in the front and rear, and space must be left for cables to run front to back. Many cables are connected to each 2145 node, and this cabling is made easier if a space is left between each node.