Grey Screen - Error help needed

Discussion in 'iMac' started by Savage Ghost, Aug 29, 2013.

  1. Savage Ghost macrumors newbie

    Aug 29, 2013
    Hi All,

    First post here as most of previous question have been answered by threads already posted.

    I have an iMac 27" Intel i5 with 8Gb RAM 1Tb HDD and it has been very slow over the past few months often freezing and requiring a hard reboot. The machine has been getting very hot as well.

    Yesterday the machine froze twice in quick succession and the second time it failed to reboot and gets stuck on the apple logo with the spinning wheel. I followed the Apple support

    1. SMC reset [4]. No difference
    2. PRAM reset [5]. No difference
    3. Safe boot [6]. No difference
    4. Hardware test [7]. - no difference
    5. Boot from install disk. - disk keeps getting spat out​

    To get more info I did step 3 again in verbose mode and the end of the CMD lines look like this: (# just indicated new line just incase it wraps in your screen)

    # AppleAHCIDiskQueueManager::setPowerState(0xffffff8019b6900, 2 -> 1) timed out after 101079MS
    # disk0s2: I/O error
    # 0 [level 3] [ReadUID 0] [Facility] [ErrType IO] [ErrNo 5] [IOType Read] [PBlkNum 1534624] [LBlkNum 1534624] [FSlogMsgID 2056997970] [FSlogMsgOrder First]
    # 0 [Level 3] [ReadUID 0] [Facility] [FSlogMsgID 2056997970] [FSlogMsgOrder First]
    # jnl : unknown-dev : update_fs_block : error reading fs block # 1534624! (ret 5)

    Can anyone help identify the issue from this or is more needed?

    PS - Even though the Mac is doing nothing with the CMD line stuck it is still getting very hot! I have checked and cleaned the fan/ vents so this is not the issue unless the fan has actually stopped.

    The iMac is out of warranty.

    Thank you for any help.

  2. macthefork, Aug 29, 2013
    Last edited: Aug 29, 2013

    macthefork macrumors 6502

    Feb 2, 2013
    Looks like a HDD issue. You didn't mention what year your iMac is, as Apple had a Seagate HDD replacement program for certian iMacs that has expired. However you can check here with your S/N to see if was one that had an affected drive. If it's listed, then I'd call Applecare and see what they say (in some cases they were still doing the repairs for free).

    If your iMac isn't listed, you may still be able to access some data on the drive if you're able to boot off an external drive. You can try your original boot disk again, but hold down the option key at start up with the disk installed and see if that allows you to boot from it.

    At any rate, it looks like a failed drive with bad blocks. You can bring it to Apple for a full diagnostic test.

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