IBM 8671 - Eserver xSeries 235, Руководство по техническому обслуживанию и устранению неисправностей

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Installing memory modules
Adding memory to your server is an easy way to make programs run faster. You
can increase the amount of memory in your server by installing memory-module
options. When you install memory, you must install a pair of matched dual inline
memory modules (DIMMs).
Notes:
1. The system board contains 6 DIMM connectors and supports two-way memory
interleaving.
2. The DIMM options available for your server are 128 MB, 256 MB, 512 MB, and
1 GB. Your server supports a minimum of 256 MB and a maximum of 6 GB of
system memory.
3. The amount of usable memory will be reduced depending on the system
configuration. A certain amount of memory must be reserved for system
resources. The BIOS will display the total amount of installed memory and the
amount of configured memory.
4. When you install additional DIMMs, be sure to install them in pairs. Both of the
DIMMs in a single pair must be the same size, speed, type and technology. You
can mix compatible DIMMs from various manufacturers.
5. Each DIMM pair does not have to contain DIMMs of the same size, speed, type,
and technology as the first pair.
6. Install only 133 MHz/266 MHz, 2.5 V, 184-pin, double-data-rate (DDR), PC2100,
registered synchronous dynamic random-access memory (SDRAM) with error
correcting code (ECC) DIMMs. These DIMMs must be compatible with the latest
PC2100 SDRAM Registered DIMM specification. For a list of supported options
for your server, go to http://www.ibm.com/us/compat/ on the World Wide Web.
7. Your server supports Chipkill memory if the DIMMs are all type x4 and are
larger than 128 MB. Using any 128 MB DIMMs, or DIMMs that are not type x4,
on your server disables Chipkill memory.
8. You do not need to save new configuration information when installing or
removing DIMMs. The only exception is if you replace a faulty DIMM that was
marked as Disabled in the Memory Settings menu. In this case, you need to
re-enable that memory row in the Configuration/Setup Utility or reload the
default memory settings (see “Choices available from the Configuration/Setup
main menu” on page 16).
Install the DIMMs in the order shown in the following table.
Table 7. DIMM installation sequence
Pair DIMM connectors Diagnostic reference
First 6 and 5 (J15, J14) Bank 3
Second 4 and 3 (J12, J11) Bank 2
Third 2 and 1 (J9, J7) Bank 1
The following illustration shows the DIMM connector locations and how to install
DIMMs on the system board.
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xSeries 235 Type 8671: Hardware Maintenance Manual and Troubleshooting Guide