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I've just upgraded my EC2 instance to Natty, using do-release-upgrade.

However, the block devices /dev/sdf, /dev/sdg, ... are no longer existed.

(I've already attached EBS to these devices, though.)

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what does dmesg show? are they now sdh and sde, etc? – polynomial Sep 18 '11 at 1:01

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In Ubuntu 11.04 Natty on EC2, you will find the block devices on the instance have been renamed to /dev/xvdf and /dev/xvdg though you'll still need to use /dev/sdf and /dev/sdg when specifying them to the Amazon API tools like ec2-attach-volume and ec2-run-instances --block-device-mapping.

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