6 Replies Latest reply: Dec 25, 2007 5:13 PM by papirin
papirin Level 1 Level 1 (35 points)
First thanks for read my question, so my problem is that I buy a Western Digital (My Book) USB external hard drive so I did a backup with Carbon Copy Cloner and SuperDuper both apps do a great backup job and with both I can boot from my USB external hardrive via System Preference Startup Disk, but when try to boot via restart and hold down alt/option key neither can boot Carbon Copy Cloner or SuperDupe not even my internal hard drive shows I releas the alt/option key and the computer boot from my internal drive so I disconect de external hardrive and restart my MacBook Pro (to see if the key is not working properly) but it works the computer show my internal drive almost instanyly so I choose it and the computer boots normaly then I try it again with the external hard drive conected and hold alt/option key for about 1 minute but neither hard drive shows but when I releas the alt/option key the computer boot from my internal drive properly.

so what I'm doing wrong?

macbook pro
  • sig Level 8 Level 8 (35,780 points)
    Press Option-Command-Shift-Delete
    during startup.
  • smithrj Level 4 Level 4 (1,540 points)
    How appalling that a computer with two FireWire ports can't use two FireWire devices!

  • papirin Level 1 Level 1 (35 points)
    I will try that but what it does can you tell me and I do it with or without the external drive conected
  • papirin Level 1 Level 1 (35 points)
    hi thanks for read but my computer have only one firewire MacBook Pro first generation and only have money for this cheap external harddrive.
  • papirin Level 1 Level 1 (35 points)
    sig I try your suggestion but didn't work and something I not metion before my external hardrive is partitioned 50gb for Mac OS X and the other is empty the 2 partition are GUID format Mac OS extended (journaled)
  • papirin Level 1 Level 1 (35 points)
    thank you both so I reset my Reset Parameters Ram then restar the computer and said I will hold alt/option key until something happend and guess what something and after like 2 minutes an half something happend the two hardrives show so I guess the slownwes of the system to recognize the external harddrive is because the hardrice is cheap and very slow but again