--- a/awesome/my.lua	Sat Apr 16 13:41:51 2016 -0400
+++ b/awesome/my.lua	Sat Apr 16 13:57:38 2016 -0400
@@ -147,8 +147,8 @@
    w.width = 150
    w:set_align('center')
    local format = '<tt> '
-   for _, device in ipairs(devices) do
-      format = format .. device .. ': ${' .. device .. ' total_mb} '
+   for device, name in pairs(devices) do
+      format = format .. '[' .. name .. ' ${' .. device .. ' total_mb}] '
    end
    format = format .. '</tt>'