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Thread: Some of my ram DIMMs aren't showing up

  1. #1
    Join Date
    Mar 2009
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    Albuquerque New Mexico
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    Ubuntu 12.04 Precise Pangolin

    Question Some of my ram DIMMs aren't showing up

    Hello everybody with powerpc's,
    I'm looking to find a way of identifying which ram slots are used. Unfortunately I have 3 gigs worth of DIMMs installed but only 1.5GB of memory show up as recognized by /proc/MemTotal or in System Monitor.

    I found how to do this with intel/amd architecture but it requires the BIOS in the machines to be read with dmidecode. As this is a powermac G5 dual 2.5ghz dmidecode isn't even in the powerpc repositories.

    How do you all find which ram slots are being used?

  2. #2
    Join Date
    Oct 2007
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    338

    Re: Some of my ram DIMMs aren't showing up

    try this you may have to scroll and look for it
    dmidecode -q | less
    it will output a lot of info but your looking for something like this
    Memory Device
    Total Width: 64 bits
    Data Width: 64 bits
    Size: 2048 MB
    Form Factor: DIMM
    Set: None
    Locator: DIMM_3
    Bank Locator: Not Specified
    Type: DDR
    Type Detail: Synchronous
    Speed: 800 MHz
    Manufacturer: 0000000000000000
    Serial Number: 00000000
    Asset Tag: 000000
    Part Number: 2G U64CP8-S6

  3. #3
    Join Date
    Mar 2009
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    Albuquerque New Mexico
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    Distro
    Ubuntu 12.04 Precise Pangolin

    Re: Some of my ram DIMMs aren't showing up

    Dude, read the second half of my post. dmidecode doesn't work with PowerPC

    I need advice about OpenFirmware aka OpenBoot. Anybody out there a Solaris admin? or a Old time X-Serve guru? Or a IBM POWER sysadmin?

    Any Unix Guru's out there that know about Firmware in general? Coreboot folks?

  4. #4
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    Re: Some of my ram DIMMs aren't showing up

    ususally from OF you are able to see the installed ram:
    Code:
    > dev /memory@0
    > .properties
    Anyway remember to reset NVRAM/PRAM everytime you modify your hw configuration.

  5. #5
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    Re: Some of my ram DIMMs aren't showing up

    Wow, thank you BarbaGNU. I needed a solid answer like that.

    May I ask you how you found my thread? As you can see I tried to put a lot of keywords in my second post so that it would be more search friendly.

  6. #6
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    Re: Some of my ram DIMMs aren't showing up

    i'm glade you solved.

    About tags... no, i don't. I simply/seldom read this forum interested in ppc topics.

  7. #7
    Join Date
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    Distro
    Ubuntu 12.04 Precise Pangolin

    Re: Some of my ram DIMMs aren't showing up

    Hey BarbaGNU,
    I have a follow up question.
    After googling dev /memory@0 and .properties I found that you can set openfirmware to display base 10 instead of hexidecimal. But it doesn't in the memory's .properties.
    Any suggestions?

    Or should I just get out a scientific calculator and figure it out?

  8. #8
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    Re: Some of my ram DIMMs aren't showing up

    no idea, sorry.

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