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I'm trying to mount /vol to a EBS volume on an Amazon EC2 instance. I'm formatting the device to xfs, adding "/dev/sdh /vol xfs noatime 0 0" to my /etc/fstab file, making the /vol dir and mounting it and whenever I try to do anything with that volume (create a file in /vol, cd, ls, anything) or I try to run df the server just freezes.

Anyone have any idea what this might be? It's driving me crazy.

Edit: It seems to freeze after I mount, has nothing to do with doing any commands to the volume it's self.

William
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  • Is the mount freezing or is the entire system freezing? Is there anything interesting at the end of a dmesg output after trying to mount it (assuming the system doesn't freeze)? Are you able to just mount the volume without using the fstab entry? – carson Mar 05 '10 at 01:32
  • Just mounting normally freezes everything. It basically puts me at a new line when I click enter, and I can type, do whatever I want but it never does anything. It's like an infinite black hole – William Mar 05 '10 at 01:57

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You don't mention which distribution you are using but I know there were sometimes issues in Ubuntu Intrepid (and possibly other releases) where XFS would behave badly if the log version was not set to 1 like this:

mkfs.xfs -f -l version=1 /dev/sdx

The default is log version 2 but this is known to cause kernel panics in older kernels.

Since I've been making the file system this way I've had no problems at all with XFS on ec2.

ianjs
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It seems to only be an issue with the 32 bit Debian image from elastic (http://developer.amazonwebservices.com/connect/entry.jspa?externalID=1615&categoryID=101). Any other AMI works fine.

William
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