sas2vdev.rb

#!/usr/bin/env ruby

require 'rubygems'
require 'pp'
require 'optparse'

def parse(args)
  @options = {}
  @options['debug'] = false

  OptionParser.new do |opts|
    opts.banner = "Usage: #{File.basename(__FILE__)} [options]"

    opts.separator ""
    opts.separator "Specific options:"

    opts.on('--[no-]debug', 'Enable debug output.',
            "  Default: #{@options['debug']}") do |debug|
      @options['debug'] = debug
    end

    opts.on('-h', '--help', 'Display this screen.') do
      puts opts
      exit
    end

    begin
      opts.parse!(args)
    rescue OptionParser::InvalidOption, OptionParser::MissingArgument
      puts $!.to_s
      puts opts
      exit
    end
  end
  @options
end

def debug_output(msg = "", object = nil, opt = {})
  return unless opt['debug']
  puts "DEBUG: #{msg}"
  pp object unless object.nil?
end

options = parse(ARGV)

drives = []
controller_count = `sas2ircu LIST | grep -c -E '^\s+Index'`.strip.to_i
debug_output("Controller count: #{controller_count}", nil, options)
(0..(controller_count-1)).each do |n|
  output = `sas2ircu #{n} DISPLAY`

  drives_output = output.split(/^$/)

  debug_output("Drives outout:\n", drives_output, options)

  drives_output.each do |output|
    d = {}
    output.each_line do |line|
      case line
      when /Slot \#\s+: ([0-9]+)$/
        d['slot'] = $1
      when /SAS Address\s+:\s(.*)$/
        d['address'] = $1.gsub('-', '')
      when /GUID\s+: (.*)$/
        d['guid'] = $1
      end
    end

    drives << d unless d['guid'].nil? or d['guid'] == 'N/A'
  end
end

debug_output("Drives:\n", drives, options)

drives.each do |drive|
  Dir['/dev/disk/by-id/*'].each do |id_dev|
    if File.basename(id_dev) =~ /wwn-0x#{drive['guid']}$/
      drive['name'] = File.basename(File.readlink(id_dev))
      Dir['/dev/disk/by-path/*'].each do |path_dev|
        if File.basename(File.readlink(path_dev)) == drive['name']
          drive['path'] = path_dev
        end
      end
    end
  end
end

drives.each_with_index do |drive,i|
  vdev = "%02d" % (i.to_i + 1)
  puts "alias d#{vdev} #{drive['path']}"
end