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Description of problem:
Disk devices in EC2 start with /dev/xvde rather than /dev/sda or even /dev/xvda.
Steps to Reproduce:
1. Start any RHEL 6 instance in EC2
Actual results:
The root device name is /dev/xvde
Expected results:
The root device name is /dev/xvda
Additional info:
This is fixed in the kernel:
https://bugzilla.redhat.com/show_bug.cgi?id=729586
To make this work in EC2, the AMIs need a kernel parameter specified to use the fixed behavior. The modparam is "sda_is_xvda=1".