So my 1GB memory kit arrived today, two 512MB dimms (holy cow are they huge!). As soon as I got home I prepped an old Linux laptop I have with mincom and a laplink cable and proceaded to install the dimm's into the first unit in the pile. typed power up and the first O300 came to life, awesome! After I started the system I switch to console mode by hitting ctrl_d and watch as the memory check reports an error. The error is "swapping bank 0 with bank 1". Rats do I have a bad dimm? So i open the system, swapped the memory modules and powered it back up. same message.
Further down the console boot log it says:
memory enabled = 512MB
memory disabled = 256MB
Thinking I might have been sent two mismatched dimm's I took them out and inspected them carefully, even comparing chip part #'s. Identical. Okay lets try the next system, power up, and what do you know, no memory errors and "memory enabled = 1024MB". I went back to the first unit and checked the dimm sockets for dirt, nothing clean as a whistle. Tried installing the memory again and wiggleing the diims to make sure they are firmly seated and still the same memory error messages.
Now here is where it gets interesting, The first unit I opened had the two screws securing the access lid. The other four units have their screws missing when the memory was pulled. That person knew the memory was missing and never bothered to open the unit. This leads me to believe that the memory controller had gone bad before the system was decommissioned. From what I know, nodes can be operated without memory when linked to a unit or units with memory, correct? They just ran the unit without memory.
I have not yet tested the other 3 systems but I will tomorrow when I have some more time. Looks like one system is a partial lemon
. Any way to fix this problem or is this a bad logic board?
Further down the console boot log it says:
memory enabled = 512MB
memory disabled = 256MB
Thinking I might have been sent two mismatched dimm's I took them out and inspected them carefully, even comparing chip part #'s. Identical. Okay lets try the next system, power up, and what do you know, no memory errors and "memory enabled = 1024MB". I went back to the first unit and checked the dimm sockets for dirt, nothing clean as a whistle. Tried installing the memory again and wiggleing the diims to make sure they are firmly seated and still the same memory error messages.
Now here is where it gets interesting, The first unit I opened had the two screws securing the access lid. The other four units have their screws missing when the memory was pulled. That person knew the memory was missing and never bothered to open the unit. This leads me to believe that the memory controller had gone bad before the system was decommissioned. From what I know, nodes can be operated without memory when linked to a unit or units with memory, correct? They just ran the unit without memory.
I have not yet tested the other 3 systems but I will tomorrow when I have some more time. Looks like one system is a partial lemon
. Any way to fix this problem or is this a bad logic board?
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Coming soon!
On their way:
