14 Replies Latest reply: Aug 28, 2009 2:16 AM by AlphaUltima
djalaska Level 1 Level 1 (0 points)
I was using my Buffalo external hard drive to back up my imac and for music just fine until a few days ago. I turned the external hard drive on and instead of appearing on the desk top as usual, it did not appear at all. I tried the 2 different types of resets, I tried to unplug it then plug it in again, and then I tried to wiggle the USB cables to make sure they fit. nothing works. Please help.

imac, Mac OS X (10.5.7)
  • Kenichi Watanabe Level 7 Level 7 (30,460 points)
    Have you shut down (powered off) your Mac since this problem occurred (with the drive powered off at the same time)? Did you try a different USB port? If it is connected to a USB hub, did you try it connected directly to the Mac's port with no other USB peripheral devices connected (except for your standard keyboard/mouse)? Did you try a different USB cable?

    When you run Disk Utility, does the drive appear in the sidebar?
  • djalaska Level 1 Level 1 (0 points)
    Thank you for your comments. I have tried all that you have mentioned other than trying a different USB cable. when I run disk utility it does not appear in the sidebar. This has happened at least one time before and i dont' remember what I did to resolve it the last time.
  • Kenichi Watanabe Level 7 Level 7 (30,460 points)
    A bad USB cable is a common problem. I would try getting a new one to see if it fixes the problem, before investigating other possibilities. Make sure it is a USB 2.0 cable, and not any old USB cable you may find you your storage (the older ones made for USB 1.1 are often not rated for the higher speed).
  • HelpVettie Level 1 Level 1 (0 points)
    I have a similar problem. Just bought a Buffalo 1 TB 1SATA, External USB 2.0 Hard Drive. It has its own power supply. It is all connected correctly, power on, heard the sound when it started. I can see it in Disk Utility and System Profiler, but it won't mount. I think it may be a problem with the connection ID, as it says Unknown. I've tried Verifying the disk, says its OK. Tried Repairing disk, and it keeps on thinking (forever) until I stop it. How can I get the **** thing to MOUNT! Any help please.
  • djalaska Level 1 Level 1 (0 points)
    I tried switching USB cables with the one from my printer. no change. the hard drive cable is 2.0, but i don't know about the printer. i also tried hooking the hard drive to my windows xp lap top via the original 2.0 usb cable and the windows computer detected it....
  • Kenichi Watanabe Level 7 Level 7 (30,460 points)
    Does the printer work off the same USB port you are using with the hard drive?

    Actually, if you connect your keyboard/mouse to the same port, do they work?
  • djalaska Level 1 Level 1 (0 points)
    Yes, the printer works off of all the ports, and the hard drive does not work off any of the ports.
  • poolboy82 Level 1 Level 1 (20 points)
    I'm having the same problem but I have a Seagate FreeAgent. Shortly after downloaded the newest Mac update my drive started disappearing. Usually a reboot would solve the issue.

    Do you have another device that you could hook your external drive up to? I wanted to see if it was the drive so I hooked mine up to my Xbox 360. The Xbox had no problem seeing and accessing the drive. Makes me think that once again, an update to OS X has killed the functionality of my iMac.

    I know this does nothing to answer your question but it does hopefully show that you are most certainly not alone.
  • poolboy82 Level 1 Level 1 (20 points)
    I'm sorry I didn't see your post showing you hooked it up to your Windows XP system.

    Clearly we do share a lot of the same issues in common.
  • poolboy82 Level 1 Level 1 (20 points)
    Sorry for posting yet another response to this thread. I recalled reading on TUAW that they asked if anyone was having issues since updating to 10.5.7. As I made my way through the 10+ pages on comments I noticed a very common theme.

    USB mounted external hard drives disconnecting, not being able to eject, or not able to read.

    Dozens of comments having the same issue. Looks like it almost has to be the last update. A couple of responses suggest installing the Combo Updated for 10.5.7 to see if that helps. Others mention it might have been an issue with the newest iTunes update.
  • djalaska Level 1 Level 1 (0 points)
    I called apple and have a case open with them. they asked me to check the website for the hard drive. mine is a buffalo. Now that I think about it maybe it was that itunes update that did it????? good call on that one... I will try asking them about it tomorrow when i talk with them.
  • djalaska Level 1 Level 1 (0 points)
    I finally called the makers of the hard drive, went to see an apple guy and they all said that the drive might be corrupted... though they didn't know why the fat 32 section of the drive was still recognizable on the windows xp and not on the mac os. I am going to reformat the drive.
  • djalaska Level 1 Level 1 (0 points)
    I finally called the makers of the hard drive, went to see an apple guy and they all said that the drive might be corrupted... though they didn't know why the fat 32 section of the drive was still recognizable on the windows xp and not on the mac os. I am going to reformat the drive.
  • AlphaUltima Level 1 Level 1 (0 points)
    i'm getting the same problem.
    worked perfectly last nite. now it's not mounting.
    disk utility says it appears to be ok.
    tried my freeagent go and it mounts fine.
    then when i try to eject it it says it can't be unmounted.
    what the **** is up with these updates.
    all they do is make more problems than fix them.
    it's like duur we got a new build let's rls and not check it against other conflicts.