Re: SDRAM or DDRAM in linux

On Tue, Aug 29, 2006 at 06:55:20PM +0600, Niklaus wrote:
Can you tell anything about it ? I have IBM x-series 206 server. Here
is the dmidecode information. Is SDRAM or DDRAM installed on it. It
would be great if you can tell me where to look.

Handle 0x0009, DMI type 6, 12 bytes
Memory Module Information
Socket Designation: DIMM3
Bank Connections: 6 7
Current Speed: Unknown
Type: ECC DIMM SDRAM
Installed Size: 256 MB (Single-bank Connection)
Enabled Size: 256 MB (Single-bank Connection)
Error Status: See Event Log

This looks like it sees a 256MB module in socket DIMM3

Handle 0x001A, DMI type 17, 27 bytes
Memory Device
Array Handle: 0x0019
Error Information Handle: No Error
Total Width: Unknown
Data Width: Unknown
Size: No Module Installed
Form Factor: DIMM
Set: 1
Locator: J5G2
Bank Locator: DIMM 0
Type: DDR
Type Detail: Synchronous
Speed: 133 MHz (7.5 ns)
Manufacturer: Not Specified
Serial Number: Not Specified
Asset Tag: Not Specified
Part Number: Not Specified

Socket DIMM0 says nothing is installed.

Handle 0x001B, DMI type 17, 27 bytes
Memory Device
Array Handle: 0x0019
Error Information Handle: No Error
Total Width: Unknown
Data Width: Unknown
Size: No Module Installed
Form Factor: DIMM
Set: 1
Locator: J5G3
Bank Locator: DIMM 1
Type: DDR
Type Detail: Synchronous
Speed: 133 MHz (7.5 ns)
Manufacturer: Not Specified
Serial Number: Not Specified
Asset Tag: Not Specified
Part Number: Not Specified

Socket DIMM1 says nothing is installed.

Handle 0x001C, DMI type 17, 27 bytes
Memory Device
Array Handle: 0x0019
Error Information Handle: No Error
Total Width: Unknown
Data Width: Unknown
Size: No Module Installed
Form Factor: DIMM
Set: 1
Locator: J5H1
Bank Locator: DIMM 2
Type: DDR
Type Detail: Synchronous
Speed: 133 MHz (7.5 ns)
Manufacturer: Not Specified
Serial Number: Not Specified
Asset Tag: Not Specified
Part Number: Not Specified

Socket DIMM2 says nothing is installed.

Handle 0x001D, DMI type 17, 27 bytes
Memory Device
Array Handle: 0x0019
Error Information Handle: No Error
Total Width: 72 bits
Data Width: 64 bits
Size: 256 MB
Form Factor: DIMM
Set: 1
Locator: J5H2
Bank Locator: DIMM 3
Type: DDR
Type Detail: Synchronous
Speed: 133 MHz (7.5 ns)
Manufacturer: Not Specified
Serial Number: Not Specified
Asset Tag: Not Specified
Part Number: Not Specified

This would appear to say that socket DIMM3 has a 256MB DIMM of type DDR
at 133MHZ, which would be 266MHz effective. Odd given the x206 data
sheet I found only mentions 333 and 400MHz as supported. Maybe the DMI
data is wrong, or maybe the memory in the system isn't right.

I think the only way to know for sure what type of ram a machine takes
is to read the manual, or maybe ask www.crucial.com (I have seen it have
information that was correct while an IBM manual for the machine was
wrong on the amount of ram a machine could take).

Crucial's information says the system has 4 DIMM slots for DDR memory,
and should use either PC2700 or PC3200 memory.

--
Len Sorensen
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