Sun Fire[TM] V100/V120: How to determine memory DIMM size?

Asset ID:	1-71-1009158.1
Update Date:	2010-11-15
Keywords:

Solution Type Technical Instruction Sure

Solution 1009158.1 : Sun Fire[TM] V100/V120: How to determine memory DIMM size?

Applies to:

Sun Fire V100 Server
Sun Fire V120 Server
All Platforms

Goal

Description

There is no command available in Solaris[TM] Operating System to determine the size of a memory DIMM in the Sun Fire[TM] V100/V120.
This document provides you with information showing how to determine DIMM sizes in Sun Fire V100/V120 by reading the prtconf -pv output.

Solution

Steps to Follow

Sun Fire[TM] V100/V120: How to determine memory DIMM size?

Run /usr/sbin/prtconf -pv | more and look for the section called 'memory'.

You will find it listed just after OBP device aliases.

For example:

System Configuration:  Sun Microsystems  sun4u
Memory size: 1024 Megabytes
System Peripherals (PROM Nodes):
.
.
.
ttyb:  '/pci@1f,0/pci@1,1/isa@7/serial@0,2e8'
ttya:  '/pci@1f,0/pci@1,1/isa@7/serial@0,3f8'
name:  'aliases'

        Node 0xf004fb38
reg:  00000000.00000000.00000000.20000000.00000000.40000000.00000000.20000000
available:  00000000.5fea0000.00000000.00018000.00000000.5e002000.00000000.00106000.00000000.40000000.00000000.1d080000.00000000.00000000.00000000.20000000
name:  'memory'

Look at the line that starts with 'reg:':

    reg:  00000000.00000000.00000000.20000000.00000000.40000000.00000000.20000000
|<---------- group 1 ------------>| |<------------ group 2 ---------->|

In 64 bit machines you see groups of 4 numbers reported. In the above example there are 8 numbers. This means this system have 2 DIMMs installed (8/4=2 groups).

Now look at the 4th number in each group of numbers. Every 4th number of my output is 20000000. This means each DIMM size is 512MB.

So I have 2 x 512 MB DIMMs in my Sun Fire V100/V120 box.

The conversion table is as follows:

String Pattern	Amount of memory
01000000	16MB
02000000	32MB
04000000	64MB
08000000	128MB
10000000	256MB
20000000	512MB
40000000	1024MB (1 GB Dimm)

Product

Sun Fire V120 Server
Sun Fire V100 Server

V100, V120, DIMM, memory, size, prtconf
Previously Published As
78854

Change History
Date: 2010-10-04
User name: Silvana Villamil
Action: process comments
Comments: audited/updated by Silvana Villamil, Entry Level SPARC Content Team Member

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