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Description of problem: Ephemeral storage devices are unmounted when you instance an image in EC2. /etf/fstab should automatically mount them somewhere since they are in fact, mountable. They are unparitioned ext3 volumes. How reproducible: Always Steps to Reproduce: Boot an instance in EC2 Actual results: Observe that ephemeral storage is unmounted. Expected results: Observe that ephemeral storage is mounted Additional info: We do expose the devices already at AMI registration time: -b /dev/sdf=ephemeral0 -b /dev/sdg=ephemeral1 We just need to mount /dev/sdf and /dev/sdg somewhere.
http://docs.amazonwebservices.com/AWSEC2/2011-07-15/UserGuide/index.html?InstanceStorage.html Basically this breaks down to: if i386: /dev/sda2 ext3 on /mnt /dev/sda3 swap on /swap elif x86_64: /dev/sdb ext3 on /mnt The remaining instance storages (sdc, sdd, sde) will only be available on some larger instance types and are unpartitioned space. They should not be considered. This gets tricky with micro instances though, since they can be i386 or x86_64, and have NO storage at all. Rather than mount via /etc/fstab, perhaps it would make sense to have a boot service that looks at the instance metadata and behaves depending on that.
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