IMac freezes on isk I/O timeout = please help

There was one, unresolved thread on this. My computer freezes for several minutes. The log has many messages in the format
datestamp hostname kernel[0: disk0s3: I/O timeout.
The messages are almost exactly 2 minutes 30 seconds appart.
This is what I have done without any success:
From install CD run hardware diagnostics and volume repair
Unplug all external devices (iPod, TV Tuner)
Smartreport - no error
It is happening with increasing frequency.

Did you try to examine your mac with an utility like TechTool?
It sounds to me like this could be a hardware defect.
So is your iMac still under warranty? If so, contact apple support i would suggest.

Similar Messages

  • My iphone keeps freezing, then turning itself off. Please help me resolve the problem whatever it is

    My iphone keeps freezing, then turning itself off. Please help me resolve the problem whatever it may be.

    You said that you restored it.  "forgot to mentioned that ive tried all of that"
    When you restore, you can restore from backup or as new.
    Did you or did you not restore it?
    iPhone User Guide (For iOS 5.0 Software)

  • My MACBOOK PRO NEVER LETS ME OPEN AUTOTRADER AND WHEN I TRY TO OPEN IT GETS FROZEN AND IT FREEZES OTHER WINDOWS AS WELL. Please help me to sort this problem out asap. Thanks

    MY MACBOOK PRO NEVER LETS ME OPEN AUTOTRADER AND WHEN I TRY TO OPEN IT GETS FROZEN AND IT FREEZES OTHER WINDOWS AS WELL. Please help me to sort this problem out asap. Thanks

    To prevent this being accidentally activated in the future go to SystemPreferences>Keyboard>Keyboard Shortcuts>Universal Access and uncheck all the boxes.

  • Toshiba Satellite L555 freezing up! (Tech Head Challenge) Please Help!

    It's been happening lately. My Toshiba Satellite(windows 7 home permium 64 bits) has been freezing up with multiple, thin, multi-colored lines with a noise similar to when a sound track on a CD sticks or freezes and no mouse response or any kind of response at all. I have to press and hold the power botton and force it to shut down. I noticed it does this more often when I try to play a video game,virus scan,video call on Skype and less frequently on youtube (youtube might just be a coincidence). Sometimes after the computer restarts and I virus scan or Skype then I have no problems. I think it happens when I virus scan or skype when I have both multiple firefox and google chrome windows open at once but I cannot be sure. I've tested the theory a few times but it's inconclusive however I am confident that virus scans or video game are most likely to trigger the freeze even if they are the only thing I have open on the screen.
    Sometimes I get that message in the blue box that says "Windows is shutting down to prevent damage to your computer....." The strange thing is that after I force it to shut down if I try to restart it immidiately then it will boot. All the lights will come on except the orange one in the left hand corner,the screen does not come on and windows does not load. If I leave it for 30  minutes or sometimes less after it crashed then it will restart .The funny thing is that I had this problems about 8 months ago when I tried playing a video game called A.V.A. About 2 minutes into play it would freeze with the same noise I mentioned earlier.I repeatedly tried to play the game and it happened every single time and everytime I force shut down the laptop and try to restart it right after then windows will not load and the orange light does not come on. I removed the game and reinstalled it and I never had that problem again.Since I got the laptop it has randomly restarted like 4 times and I've had it for about 1 year and 2 months but now it is just freezing up (mostly) or I get that message in the blue box. At around April of this year the game stopped working. I keep getting error reports when I try to reinstall it and my windows no longer recongnized the digital signature of the company that made the game.
    I'm not sure if it's overheating,I have a hard drive or motherboard problem or if it's a software problem. I've tried:
    System Restore
    Defrag
    Disc Clean up
    Non of these have helped. I've also tried using SeaTool for Windows to try to look for errors in my hard drive and it has not found any. I've also done that thing where Windows,with the black screen and white text, check through your files for errors and corrupted stuff but that report says that it hasn't found any errors at all. My computer has no slow down in performance that I can notice. It doesn't take long to start up nor does it take long to shut down. I don't get random error reports or anything like that. It works fine except for the freezing bit.
    The fan seems to be working just fine and the latop doesn't get that hot. Sometimes it freezes when it's barely warm to the touch and other times it would be significantly warmer but it would not freeze even if I have multiple firefox and googlechrome windows open. Before all of this when my game was working I use to play for hours with the exhaust at the side significantly heating up the desk and the computer would run perfectly without problems except that brief period I mentioned earlier where the game froze 3 minutes in to actually playing the game,reinstalled it and solved the problem. Yesterday it froze on me while I was on skpye and today it froze on me about 5 minutes after windows log in on youtube without the computer getting hot,just barely warm. I just don't get it!
    I've try using a vaccum to clean the vents without opening the computer. I've removed and reinserted my memory just incase they were loose and I've also removed and reinserted the hard drive to be sure that it was in properly and that has not stopped the problem either.
    N.B. I did do a virus scan with a trial version of Kaspersky Pure that I installed less than a month ago and it does say that I have a virus called "virus heur trojan.script.iframer" and a medium and high risk events. I've tried to remove or quarantine them but nothing happens and when I scan again with Kaspersky Pure or Kaspersky Virus removal tool they find no viruses BUT the trojan report is still there with the option of removing and quanrantine.
    As I've said before I've seen no slow down in performance and it works just fine except for the freezing and the blue box message. The only noticeable problem is that both firefox and googlechrome have been just a little,little bit buggy in that sometimes I would have to close down a window and reopen it again because the pages were not loading but that's only on Facebook and a few other websites and I thnk that's because of my internet connection. As I said, I've gotten no random error reports,not from windows 7 or my browser.
    Please help!

    It sounds sort of like it could be related to overheating, but on the other hand, you specifically said that it doesn't always feel warm. If you're okay with backing up your files, you might want to perform a full recovery back to factory default conditions. At that point, you'd at least know whether it was due to hardware or software.
    - Peter

  • ITunes 10.5 on Windows 7 freezes....constantly? PLEASE HELP A.S.A.P!

    I don't know how to fix this. I've contacted iTunes support over the phone and it still does it, but now not AS frequently, but let me explain.....
    Okay, well. I have had iTunes since the iTunes 9. Personally, iTunes bugs the living crap out of me. But that's besides the point. Ever since I've updated to iTunes 10.4, almost every time I try to open iTunes it opens but then freezes. It never connects to the Apple Store anymore (it freezes in the middle of it), and now updating to 10.5 it freezes upon opening CONSTANTLY. There has not been a time it has not froze on opening. I can't sync my music OR my apps to my new white iPod because of this. I have to be very patient (which is difficult for me ) and I have to wait for it to unfreeze (sometimes it never does) and work through whatever I'm doing VERY slowly. Can ANYBODY help me? I am so frustrated!! Sorry for the long explanation, I wanted it as detailed as possible. I never get any error messages. Is it my computer and if it is how do I fix it?! I've uninstalled/reinstalled iTunes, which didn't work.
    PLEASE HELP!!!!!!!!!!!!!!!!!

    Peter Hah
    After spending another two days on pinning down the iTunes 10.5 blank store page problem, here's the solution to be found: https://discussions.apple.com/thread/3372617?start=0&tstart=0
    Look out for "japiohelp".
    In short:
    a) press Windows key + "R", enter "cmd", and press Ctrl+Shift+Enter (= runs as admin)
    b) enter "netsh winsock reset" and pres enter
    c) reboot the computer
    and Bob's your uncle.
    P.

  • IMac G5 HD Won't Boot. Please Help.

    I have an iMac G5 (Power PC) which has been running OS 10.5.8 without any issues until today. 
    When starting, I have a grey screen with the Apple logo, but the wheel beneath keeps turning and the computer will not boot up. I've tried to start it many times, and I just get the grey screen, etc.   P.S.  I do have a Time Capsule connected via Ethernet and Time Machine was active until this problem today.  The TC is disconnected at this point, as I was afraid I'd lose that back up.
    Here is what I tried:
    I disconnected everything except the keyboard and mouse (not internet/modem/Time Capsule)
    I booted from the Leopard Disk, and ran Disk Utility. Message said the the HD appears to be OK
    I booted from Drive Genius and ran the following:
    1.  Repair-Verify:  Message was that HD appears OK
    2.  Repair-Repair:  Message was that HD appears OK
    3.  Repair-Rebuild:  Had a few invalid volumes.  Message was that the Volume Header and HD repaired successfully
    4.  Repair-Preferences;  SAID THERE IS A CORRUPT PREFERENCE:   /bin/sh:xargs:command not found (There was no way that I saw to fix this!)
    5.  Scan for Bad Blocks:  None found
    I tried to start the computer again, but I still get the grey screen, Apple Logo, and constant spinning of the wheel WITHOUT a start.  It appears that the HD is not 'Dead' but has some issue, perhaps the corrupt preference listed.
    So, I need help with my next step. Would any of the following work and if more than one, what order would be best?
    1.  Use the Leopard Install Disk to 'Restore from Time Machine Backup'?  (Never have done this, so I'm clueless)
    2.  Use the Leopard Install Disk and 'Archive and Install' the OS?  Can I do this since the HD has the updates to OS 10.5.8?
    3.  Use the Leopard Install Disk to Erase and Reinstall the OS and then migrate from the Time Capsule (Never have done this either)
    4.  AND, if none of this works, I'm assuming I could go get a new iMac and restore everything from the Time Capsule/Time Machine, even though there the OS in a new machine would be upgraded and also Intel Processor.  Yes?
    In any case....PLEASE HELP if you can.....and THANKS

    Thanks for trying to help with this :-).  I started as you suggested and here are the last few lines:
    Airport: Link down on en1
    Sept 19  17:49:16 jack-cohens-imac-g5 ReportCrash [52}: saved crashreport to /Library/logs/CrashReporter/securityd_2011-09-19-174913_jack-cohens-imac-g5.cra sh using uid: 0gid: 0, euid: 0 egid: 0
    Sept 19  17:49:18 jack-cohens-imac-g5 ntpdate [63]: can't find host time.apple.com
    Sept 19  17:49:18 jack-cohens-imac-g5 ntpdate [63]:  no servers can be used, existing
    Sept 19  17:49:18 jack-cohens-imac-g5 mds [32]: (error) server: mdsync Launch failed: (ipc/rcv) timed out
    Let me know what this means, please.  Also, I have the screen 'up', so I can give you more lines if that'll help.
    Much appreciated.
    Sandie

  • Hi, can I install windows XP with bootcamp on my iMac which is now on Maverick? Please help.

    Hello all, can I install windows XP with bootcamp on my iMac which is now on Maverick? Please advise. Thank you.

    Install 7. Don't bother with applying drivers and such, just reboot again from DVD and install again, it will see the existing system and this time activation will be possible.
    Vista is mess, takes longer etc. Hope you have SP1 version of 7. And for Vista, only SP2+ are even supported now, by MS.

  • FaceTime requests to my iPod AND iMac computer, which is not wanted.. please help! Need answers ASAP.

    I just bought a iMac Intel. I was playing around with the settings and I typed in my Apple ID into the computer and connected my FaceTime to it. I also have a iPod touch (fourth generation) in which case, I have all my contacts on and information on. At first, it wasn't exactly working.. I think. I imported my contacts but they weren't showing up onto my contacts list, nor my contacts list on the FaceTime app. So, I logged out of my Apple ID and yes, there was a pop up asking me to delete all the information imported and I did press delete. But now, my iMac is logged out of my Apple ID. On the contacts list, it says there are no contacts. And it's literally empty. BUT, I'm recieving FaceTimes on my iPod which are also popping up onto the iMac. I went into my Settings, and literally everything was disconnected. In the contacts, there were none, 0. No iMessages. Nothing. But I'm still recieving FaceTimes to both devices, which I don't want. I need help trying to disconnect everything from the iMac, I do not want my FaceTimes also being recieved on there. PLEASE HELP ME, I AM STRUGGLING.
    Also, how do you reset all the settings on there? Even if there is no solution to finding a way to stop FaceTimes to going to both devices, obviously, there is but, on my iPod there is a setting that says "Erase All Content and Settings", can you do that on a iMac? If yes, please tell me how. Somebody please help me, I'm actually very in the need of help.

    See this older post from another forum member Zevoneer covering the different methods and software available to assist you with the task of copying content from your iPod back to your PC and into iTunes.
    https://discussions.apple.com/thread/2452022?start=0&tstart=0
    B-rock

  • Lightroom 4.3 freezes system when I try export - please help me!

    I am so tired now with this Lightroom
    Almost every time when I try export all system creshes.
    My computer:
    Intel(R) Core(TM)2 Quad CPU Q9650 3,00 GHz
    8 GB RAM
    ATI Radeon HD 4800
    Windows 7 Service Pack 1
    I wrote to technical support and got advice about instal Lightroom 4.3 (I tried it with 4.1, 4.2, 4.3) on created new user  Windows, and nothing. I exported few photos and now again I can't export no photos more. And get still crashing system
    Please help me...

    And if all that happens is your system freezes without any error message and the only thing you can do is power it off, then I can think of a couple things: 
    1)      If you have your phone plugged in to a USB cable attached to the computer, disconnect it.  Some phones don’t play nice when they are connected as removable storage.  Unplug any other USB devices to see if the Export starts to function, again.
    2)      Your computer may have a hardware or driver issue where installing new video drivers and testing memory are a couple things to try but otherwise it may be hard to diagnose.
    Since it worked once, there is some hope you’ll be able to determine what is causing it not to work by repeated the process preceded the one time it did work, and then don’t change anything and try another Export and see if it works, and if so, then keep track of what you do elsewise with the system between the last time it works and the first time it doesn’t to see if there is some pattern.

  • My new imac has stopped working!!! PLEASE HELP ME!!

    I turned my imac on this evening to find that after the grey apple screen, the 'Loading Mac OSX' screen comes on and then goes off and a black screen comes up.
    On this black screen it says:
    Login Apr 22 ntpd[148]
    Can't open /var/run/ntpd.pid input/output error
    Please help me, i don't know whats wrong and what to do to fix it. I had to press and hold the power button to turn it off. When i turned it back on - still the same thing.
    I have only had my imac for about 4 days... don't want to have to take it back already... just as i have finished copying all my files.
    Thanks for any help in advance
    Intel Imac   Mac OS X (10.4.6)   2GB RAM 256MB VID RAM

    Hello! At this point the first thing to try is to boot from the install cd/dvd. With the disk inserted hold down the "c" key at startup. Once booted run diskutility repair disk. You'll have to navigate within the installer window. If you can't get the tray open hold down the bouse button and turn it off and back on to open the tray. Tom

  • Can't Install OSX Yosemite on iMac Mid-2009 Stuck - No Recovery Partition PLEASE HELP

    I had an old iMac Mid-2009 2GB on OSX Lion, which had been kept away in the garage for a while. Pulled it out, ran Lion fine. It was going to be set up as a new computer, so I downloaded OSX Yosemite, planning to wipe and re-install after installation. Took a lot longer than I expected. After a while, the apple logo progress bar froze. I googled it and many people said just to wait it out, it could take up to 12 hours. 1 week later, still there. Fairly confident that nothing was going on on the hard drive. I reset the PRAM, didn't help. So I tried another fix I found which involved booting into the recovery partition. Guess what, no recovery partition . So finally I went to the trouble of creating an install usb. Booted fine, so I went into Disk Utility to erase my hard drive and re-install. But guess what, I couldn't! Can somebody please help! Or is this iMac stuffed?

    Finally figured out the solution. My internal HDD appears to be not working after that faulty Yosemite installation. Just got a fast external HDD, plugged it into the iMac. Booted from the USB, went into Disk Utility and formatted it as Mac OS Extended (Journaled) in GUID. Installed and got up an running fine. Finally fixed this after 3 weeks! Hopefully this will help anyone that has the same problem.

  • Serious issues with iMac, black screen during erase and install-PLEASE HELP

    My sister's Intel iMac G5 seriously has been a lemon, it has had SO many issues. It's now 2 years old, and has been rather slow for the maybe the last year, but over the last month or so it has gone way downhill, and it literally takes an hour to boot up, and 4-5 minutes to do anything (open an application, look at a photo in iPhoto, etc.). So, we've been trying to "erase and install" with her install discs to hopefully give the computer a clean boot and see if it helps at all. She has already backed everything up.
    She started the erase and install last night, and it was going ridiculously slow. This morning when she woke up, the blue progress bar had gone about half way across. Then she went to get her kids ready, and when she came back in it looked like the computer was rebooting itself (gray screen with apple), but then the screen turned black and she can't do anything on it. Has anyone seen anything similar to this before?
    We have had so much trouble getting this to work (we tried an archive and install a few days ago, but it gave her an error at the end). For about a day we couldn't even get the computer to boot up at all, but then miraculously yesterday morning it booted! Please help, I've converted her to Macs but if I can't get hers fixed she may never get one again!!

    I'm afraid that it's a contradiction in terms to talk about an intel iMac G5. What your sister has is an intel machine, and she will find good advice by posting to the [intel iMac Forum|http://discussions.apple.com/forum.jspa?forumID=1110].

  • Imac G5 tiger will not start up, PLEASE HELP

    i have an imac G5 powerPC running tiger. when i turn it on it does the normal noise, then goes through the normal stuff, but when the load up or start up bar comes on, it will load slowly inch by inch when normally it would load almost instantly. it will then get to the end and just stay there...
    what is wrong with this? how can i fix it? please help, thanks!

    HI,
    *"thank you for your reply. however this did not work."*
    Do you mean you couldn't run Disk Utility from your install disk?
    *"if i re-install tiger will my documents and music and stuff be lost? will that solve my problem?"*
    No one can guarantee it will solve the problem but instead of an erase and install which would erase all your documents and music, try an archive and install instead. For information go here.
    About the Archive & Install Feature
    You should also make a back up of important files before any Mac OS X installation, whether erase or archive just in case.
    *"i tried to install the latest security update and when it was downloading it, it was almost done when a message came up and said that it could not be installed at this time"*
    Check your available disk space also. Right or control click the MacintoshHD icon on your Desktop, then click: Get Info. In the Get Info window, click the discovery triangle so it's facing down. You will see; Capacity and Available Make sure you have 10% available disk space, 15% is better. Not enough available drive space can cause issues like you are experiencing.
    Carolyn

  • HT1338 My MBA running osx version 10.6.8 cant update, it take hours and hours to download and freezes at verifying stage for ever , please help me

    Hi
      My MBA
    Model Name:          MacBook Air
      Model Identifier:          MacBookAir3,2
      Processor Name:          Intel Core 2 Duo
      Processor Speed:          2.13 GHz
      Number of Processors:          1
      Total Number of Cores:          2
      L2 Cache:          6 MB
      Memory:          4 GB
      Bus Speed:          1.07 GHz
      Boot ROM Version:          MBA31.0061.B01
    Cant update , it download for ages and freezes while verifing and installing for ever.
    My surfing is  also affected,
    Systems acts kind of crazy.
    Please help
    Thanks

    Not enough free disk space can cause the problems you are describing.
    Right or control click the MacintoshHD icon on your Desktop.
    Click Get Info. In the Get Info window you will see Capacity and Available.
    Make sure there's a minimum of 15% free disk space.
    Freeing space on your Mac OS X startup disk
    If it's not a disk space issue, the startup disk may need repairing, try here (MacBook Air / Snow Leopard >  OSX Tips: Using Disk Utility 6. Verify or Repair Disk

  • After upgrades iMac will not completely restart.. lost please help

    Hi, I am new to the forum but I have been scouring the net for an answer to my problem. I have found some similar problems but nothing exact so I decided to post to make a deadline. Please help.
    Yesterday night I got one of those apple software updates. I cant remember what it was for but it was fot 3 different things nothing out of the ordinary. Once they were installed I had to restart my computer. I did this and when I did my computer booted up and froze at the blue screen after the white/grey apple screen and will go no further.
    Heres where it gets a little different from other posts I have found. I have a wireless keyboard and mouse so I cannot run the start up disks or get to safe mode. I bought a different usb mouse and keyboard today and am now able to put disks in and out of the disk drive by holding down the left button during start up. The only problem the keyboard came with software that needs to be installed to make it work. So it is still impossible to connect to a keyboard. So I still cant hold shift, control or c to get to safe mode or run my mac disks.
    Im not sure where to go from hear. I have a seagate external harddrive backing everything up so hopefully I didnt lose everything. Any help would be great I am lost.
    Thanks for your time

    When you get the new keyboard, start up from Disk Utility
    1. Insert the Mac OS X Install disc that came with your computer, then restart the computer while holding the C key.
    2. When your computer finishes starting up from the disc, choose Disk Utility from the Installer menu. (In Mac OS X 10.4 or later, you must select your language first.)
    Important: Do not click Continue in the first screen of the Installer. If you do, you must restart from the disc again to access Disk Utility.
    3. Click the First Aid tab.
    4. Click the disclosure triangle to the left of the hard drive icon to display the names of your hard disk volumes and partitions.
    5. Select your Mac OS X volume.
    6. Click Repair. Disk Utility checks and repairs the disk.
    Reboot, then repair permissions from your hard drive.

Maybe you are looking for