Sun Microsystems X4150 How to Add Memory DIMMs, Install DIMMs in Matched Part Number Pairs Only

How to Add Memory (DIMMs)

Note – Sun-approved memory is the only memory guaranteed to meet the reliability and quality levels required for optimal performance of Sun Fire servers. Use only DIMMs approved and supported by Sun.

Install DIMMs in Matched Part Number Pairs Only.

DIMMs must be installed in matched part number pairs. Matched part number pair DIMMs have the same size, the same speed, and the same manufacturer.

Installing DIMMs in Matched Part Number Pairs

•Inspect the label on the DIMMs to ensure the following:

•Same manufacturer

•Same part number

Install Larger Capacity DIMMs in Lower-Numbered Slots

Larger capacity DIMMs must be installed in lower-numbered slots. If the DIMMs that you are installing are larger capacity than the DIMMs already installed in the server, do the following:

Installing Larger Capacity DIMMs in Lower-Numbered Slots

1Remove smaller capacity DIMMs from lower-numbered slots and replace with larger capacity DIMMs.

2Install smaller capacity DIMMs in the next available higher-numbered slots.

For example:

If the server is configure with two 2 GB DIMMs in slots A0/B0 and you want to install two additional 4 GB DIMMs:

•Remove the two 2 GB DIMMs from slots A0/B0

•Install the two 4 GB DIMMs in slots A0/B0

•Install the two 2 GB DIMMs in slots C0/D0

2 Sun Fire X4150 Configuration Guide • March 2009