Comment 2 for bug 634102

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Ben Howard (behoward) wrote : Re: t1.micro instances hang on reboot

This looks like a problem with the block mapping when the AMI is registered.

After firing up an t1-miro instance, the Metadata shows:
block-device-mapping:
         ami: /dev/sda1
         ephemeral0: /dev/sda2
         root: /dev/sda1

While one that does have an ephemeral mapping shows:
block-device-mapping:
         ami: /dev/sda1
         root: /dev/sda1