gistfile1.rb

devices.each do |device|
  disk = new Hash
	disk[:uuid] = get_device_uuid(device)
	disk[:device] = device

	if disk[:uuid].nil?
		if has_partition_table(device)
			if !empty_partition_table(device)
				# probably there's some unsupported file system on the first partition - don't touch it
				say("Unable to read disk UUID, although device seem to have data on it - skipping")
				next
			end
		else
			say("initializing device with new partition table")
			create_partition_table(device)
		end
		create_xfs_partition(device)
		disk[:uuid] = get_device_uuid(device)
		enable_swift_disk(disk)
	elsif node[:swift][:devs][disk[:uuid]]
		# the disk is known and used
		say("It's ok - we're already using this device for Swift")
	else
		# the disk is unknown but definitely has a certain structure - just don't touch it
		say("disk ${device} seems to have data on it - skipping")
	end
end