[Starcluster] a note about EBS volumes

Justin Riley jtriley at MIT.EDU
Thu Mar 18 18:13:34 EDT 2010


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Hi All,

Nicolas Pinto was having issues getting his EBS volume mounted with
StarCluster. The problem turned out to be that he was using c1.xlarge
instances and had specified the device/partition settings as:

device: /dev/sdd
partition: /dev/sdd1

This "should" be fine, however, Amazon now gives you 4x450gb scratch
drives attached the instance by default. Thus he was trying to mount his
volume on an unavailable device/partition combination.

Changing his setting to /dev/sdj (ie something lower than a,b,c,d - the
alread existing disks) and /dev/sdj1 fixed the problem for him.

If you're having issues getting your EBS volume attached, please try
using a lower drive letter (ie /dev/sdz) and see if that fixes the issue.

I will check for these things in the new version to ensure this doesn't
happen in the future.

Thanks and HTH someone,

~Justin
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