 
     delete: (opts) =>
         opts = defaults opts,
+            keep_disks : undefined
             cb : undefined
         dbg = @dbg("delete")
         dbg("starting")


misc = require('misc')
{defaults, required} = misc
misc_node = require('misc_node')

PROJECT = process.env.SMC_PROJECT ? 'sage-math-inc'

            cb : required
        @get_metadata
            cb : (err, data) =>
                opts.cb(err, if data? then filename(data.type))

    get_metadata: (opts) =>
        opts = defaults opts,
