Rename external storage so that JBOD disks are renamed in the form: jbod-S-D/d where S == S-card slot, D == JBOD internal device (0,1,2,3), d == disk number in the internal device.

rename_external_storage.py

#!/usr/bin/python
import re, sys

show_storage_external_brief = sys.stdin.readlines()
pattern = re.compile(r"^\s+(?P<name>\S+)\s+(?P<device>\S+)\s+(?P<slot>\d+)")
slots_seen = { }

# trying out what happens when we sort the JBOD WWNs
for line in sorted(show_storage_external_brief):
  m = pattern.match( line )
	if m:
		matches = m.groupdict()
		slot = matches['slot']
		device = matches['device']
		name = matches['name']

		if slot in slots_seen:
			slots_seen[slot] += 1
		else:
			slots_seen[slot] = 0

		# default name is the device ID. If that's the case, print the command to change it.
		if name == device:
			print "storage external jbod{}-{} device {} slot {}".format(slot, slots_seen[slot], device, slot)