Sun Fire[TM] V210/V240: mixing DIMMs of differing capacities

Asset ID:	1-71-1003857.1
Update Date:	2010-06-25
Keywords:

Solution Type Technical Instruction Sure

Solution 1003857.1 : Sun Fire[TM] V210/V240: mixing DIMMs of differing capacities

Applies to:

Sun Fire V210 Server
Sun Fire V240 Server
All Platforms

Goal

Mixing DIMMs of differing capacity within a system is supported in the Sun Fire[TM] v210 and Sun Fire[TM] v240 servers.

Solution

Oracle Confidential (INTERNAL). Do not distribute to customers
Reason: Migrated distribution from Sun

Description

Mixing DIMMs of differing capacity within a system is supported in the Sun Fire[TM] v210 and Sun Fire[TM] v240 servers.

Steps to Follow

When the V210 and V240 servers were initially released the supported memory configurations only allowed for the system to contain memory DIMMs of the same capacity to be installed within the system.

This is no longer the case. These servers can now be configured so that different banks can have different capacities of memory within a system. So a current system may now be upgraded using DIMMs that have a different capacity than the DIMMs that already occupy the server. However the memory DIMMs within a bank MUST still be a matched set . This requirement has not changed. Within a bank the DIMMs must be of the same capacity, manufacturer, speed, part number, and SPD type.

Please note that for the memory controller to be able to implement DIMM to DIMM interleaving the system must contain memory of all the same capacity. When configured with an unbalanced memory configuration the memory controller's inability to optimize interleaving will result in a slight decrease in the memory's performance potential.

Product
Sun Fire V240 Server
Sun Fire V210 Server

Internal Comments

This information is documented in the "Just the facts" documents for the V210 and V240 which can be found in the "Related Documentation" section of the product's Sun System Handbook page.

The memory configuration rules have also been updated in the service manual to reflect this newly allowed configuration (see section 1.11.1)
Sun Fire V210 and V240 Servers Service Manual

memory, interleaving, DIMM, mixed, capacity

Previously Published As
81978

Change History
Date: 2010-05-25
User name: Anthony Rulli
Action: reviewed/updated
Comments: Currency check, audited by Dencho Kojucharov, Entry-Level
SPARC Content Lead

Product_uuid
18d48708-5867-11d6-8128-c95a9ce59853|Sun Fire V240 Server
dc751a7c-eece-4157-8e4e-376351aa49fa|Sun Fire V210 Server

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