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We have One SuperMicro server and on that we installed RHEL 5.6 64 bit but after installation it hangs at STARTING UDEV .

Any ideas what is stopping it to start and proceed.


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Try starting in single user mode. See link – midnightsteel Nov 8 '12 at 19:52
Once you get into single user mode check the messages log for errors that might be causing the issue, then update your question with any pertinent information – midnightsteel Nov 8 '12 at 19:59
@midnightsteel ok dear I will try this on Saturday coz tomorrow is off and after checking the errors i will update my question. Thanks – OmiPenguin Nov 8 '12 at 21:14
up vote 2 down vote accepted

Remove quiet from the kernel command line and you should get enough output to see the cause of the hang.

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Yes I did this but there was some issue with one RAM so i removed all RAMs i plugged them and tested them one at a time and it solve the problem by removing the defected one – OmiPenguin Nov 10 '12 at 12:03
@Jim Paris Very helpful tip -- this led me to discover the BMC unit on the mobo was the cause of the boot delay. – Elliot B. Jul 10 at 1:29

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