The source of your issue is the jump between the 2.6.20 series and the 2.6.30...

The source of your issue is the jump between the 2.6.20 series and the 2.6.30 kernel series. As of 2.6.31 all devices which had previously shown up as hdx now show as sdx devices. You will need to check how the os is listing the disks and adjust.

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