OS X :: Unable To Startup - Disk0s2: I/O Error

Oct 26, 2010

I tried to on my mac this morning and just like usual, the "chime" when off and the gray screen with the apple logo came out together with the spinning gear.

However today, it took longer than usual on the spinning gear and my mac osx did not startup and my mac switched off automatically.

I then tried to boot my mac osx in safe mode(+verbose) and I got the following error:

[URL]

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Mac Mini :: Won't Boot / Disk0s2: I/O Error

Oct 31, 2009

I have boot camp installed, and when I hold the Option key down at startup, I see the Windows Vista drive (but can't select it). After about a minute, the Mac OSX drive shows up. I can select the Mac drive, but then I get stuck at the grey screen again.

I tried starting up in Single User mode and at the command prompt, ran /sbin/fsck -fy but got a couple "disk0s2: I/O errors" followed by "Invalid node structure" and "The volume Macintosh HD could not be repaired." (see attached photo of exact message).

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May 10, 2010

I'm having big problem with my notebook.

It goes down after the gray start video.

Doing the fsck this is what comes out...

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MacBook Pro :: Stuck On Grey Screen With Apple Logo "disk0s2 I/O Error 2009"

Jan 10, 2011

I have a Macbook Pro 13 from the summer of 2009. After Christmas I decided to upgrade my hard drive and memory. This is what I got. [URL] For about a week everything seemed to work perfectly. I then began to have problems almost every day (finder crashing, etc). I reinstalled OSX probably 5 times using my previous account until finally did a clean wipe and reinstalled OSX again. It now seems to be working for the most part, but booting takes about two minutes. It gets stuck on the grey screen with the Apple logo with the turning gear for a couple of minutes before it boots. Normally it wouldn't bother me too much, but after the problems I was having before, I really wanted to make sure that there was no problem with my new hard drive or memory. After doing the usual suggestions for slow boot time (resetting PRAM, disconnecting external devices, repairing disk permissions, etc.) nothing changed. I booted into verbose mode and it seems to hang up for awhile before listing

disk0s2 i/o error

It does this twice before booting, hanging up for about a minute before giving the error. I am not sure if i should return it under warranty because I am not sure its broken. Like I said, it seems perfectly fine right now with the exception of the boot time. Using the Apple Hardware Check, even the extended check, didn't give any errors. The SMART status for the hard drive is verified. Is this clearly a hard drive issue, or could it be something else? Has anyone else had a similar problem?

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May 2, 2009

Lately (started this morning), I've been getting some weird startup problems during startup. When pressing the start button, the fans spin to the max endlessly, most of the time the screen stays black without the Apple chime and computer doesn't start. After three times of shutting it down, it usually starts but performance isn't quite the same and i immediately get this error.


Sat May 2 14:19:21 2009
panic(cpu 6 caller 0x001A9C68): Kernel trap at 0x00a42002, type 14=page fault, registers:
CR0: 0x8001003b, CR2: 0x00000000, CR3: 0x0138c000, CR4: 0x00000660
EAX: 0x00000000, EBX: 0x00000000, ECX: 0x00000000, EDX: 0x00537048
CR2: 0x00000000, EBP: 0x36fd3e48, ESI: 0x0428a800, EDI: 0x03b18000
EFL: 0x00010202, EIP: 0x00a42002, CS: 0x00000008, DS: 0x03b10010
Error code: 0x00000000

Backtrace (CPU 6), Frame : Return Address (4 potential args on stack)

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Oct 29, 2008

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Oct 21, 2008

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I cannot install iPhoto update because it says my startup disk does not have enough memory.  I moved 18 hrs of tv/movies off my MacBook Air but still cannot download it.

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Apr 17, 2010

I partitioned windows XP onto my Mac HD a few days ago. It worked beautifully until last night. Whenever I booted to it, it stuck at the welcome screen for 10 minutes, and was really buggy upon startup. This morning, my MacBook Pro (bought in August '09) upon turning on automatically boots to windows XP. No amount of holding "c" or "Alt" will bring up rEFIt or boot camp selection pane. And the kicker is, the windows XP partition is completely corrupted.

Here's what happens now:
1) Turn Macbook Pro on, hold down "c" or "Alt"
2) White background for ~ten minutes, nothing happens
3) After a long time, boots to black screen and says "Startup Disk Error... Press Ctrl+Alt+Del to restart.

I'm pretty sure its trying to boot to Windows XP partition, because Ctrl+Alt+Del is not a Mac OS X command... But I can't boot to my Mac OS X partition.

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Jan 12, 2011

i had to get my screen replaced earlier this year under warranty and ever since then I have been receiving an error message on startup that pops up each time just within 5 minutes or so of logging in, and then lately my lappy has been randomly shutting down The error message states something about some extension vlabkernaladditions.kext not being found and needing to be re-installed or something. I will update this with the exact message on my next startup.Does anybody know anything about this??

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May 6, 2010

i just installed photo shop cs5 and i keep getting an error message of a file missing or not installed. and it tell me to re-install photoshop.

i have searched google and have not found anything.

but i can still use photo shop perfectly

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Jun 3, 2012

After my MaBook Pro2,1 - Intel Core 2 Duo - 2,33 GHz & 2 GB Memory - with 10.6.8. Freeze on startup every time, only running in "Save Boot" mode. I choose do perform a hardware test with the version 3A116 on a earlier Mac OS Install Disk.The test (3 times) shows an error code (after 1. test I switched memory cards), I am not able to interpret this:
4SNS / 1 / 400 000 00 : TBOT

Info:
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Jun 11, 2012

I am running OSX 10.6.8. I keep receiving messages that my startup disk is full.I tried to free space up by emptying trash & got error code -8003.

Info:
iMac, Mac OS X (10.6.8)

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Jun 2, 2009

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Jun 28, 2012

The gear wheel keeps spinning but nothing happens. I tried to start on safe mode but didn't help. I also tried rebooting holding the control/alt/P/R combination...but still the same thing.I have not backed up in a couple of weeks and ALL my work is in there!

Info:MacBookPro, running Snow leopard

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Aug 26, 2009

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OS X :: Kernel Panic At Startup - Unable To Boot

Apr 21, 2010

Yesterday I was helping someone getting to know their MacBook Pro (early 2008, Intel core 2 duo 2.4GHz, Mac OS X 10.5.2). I installed Perian and Flip4Mac and Firefox 3.6. I also checked for updates because she's on a very old version. I tried downloading the updates, but because we had a very bad internet connection I stopped the download quite early on and told her to do it at home. However after I left she tried to shut down the computer but it hanged. She manually shut it down using the power button. When she tried to turn it on again she got a kernel panic message saying she should reboot. This however didn't work.

Now I've tried all sorts of things. I've removed Perian and Flip4Mac manually. I did a disk verification (all was well) and a permissions verification and repair. I tried booting in safe mode (still won't boot) clearing the SMC and resetting PRAM, none of it worked. I just wanted to check here first before either taking it to an Apple store or reinstalling Mac OS X. I've read on forums about hardware failing (RAM mostly). No idea if that's the case. I tried a hardware test, but I don't have her DVDs and used my own with version 10.5.5. The Standard test said it was all ok, but the extended test seemed to hang. I could ask for her own DVDs which I will need anyway if I'm going to reinstall Mac OS X.

Some details of the kernel panic:
The error code is: 0x000000010
Apart from that it says the following:
Backtrace terminated-invalid frame pointer 0
Kernel loadable modules in backtrace (with dependencies):
com.apple.driver.AppleIntelCPUPowerManagement(76.2.0)@0x2e63c000->0x2e65afff
And later on it says: Mac OS version: Not yet set.

And of course it shows some more info with lots of hex codes, I can type them out for you if you like, but I read elsewhere that the error message is usually not very useful. Would you recommend going to an Apple store to see if the RAM is faulty? Or do a reinstall of Mac OS X?

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Software :: Unable To Use Caps Lock In Startup?

Jun 18, 2010

could one of you please tell me how to solve my problem?

when i power my macbook on, in login window,there'are empty Username and Password which is i have to fill. when i type my username and password , i can't access small letter which i used exactly when i set U n Password the first time i used my mac (eg.. username-dearmac, pw - loveyou).

my mac show only Cap Letter (DEARMAC...)... is it normal?

isn't supposed to be able to acces Small Letter as well. if so ... how can access that?

i turned off Caps Lock already. playing Caps Lock doesn't make any changes. it's always come out with Cap Letter....

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Intel Mac :: Unable To Complete Startup?

Jun 28, 2012

My iMac running OS 10.4.11 can't complete startup. It opens a couple of windows, then reverts to a blue screen, over and over, no matter what restart procedure I try, including the OS X installation disk.

Info:
MacBook Air (11-inch Late 2010), Mac OS X (10.6.8)

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May 21, 2010

I am new to the forum and so far have learnt a few things about my Mac. I have a problem tho. For the last few days, my MacBook had been giving me warning about the startup disc being full. Since then, I have taken steps to free up some space by deleting files and creating archives.owever, today, when I switched on my Mac today, nothing came on except a picture of a folder and a "?" on it. My question is, what can I do to start/restart my Mac and is there anything else I can do to free up my Startup disc.

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Hardware :: Unable To Find Internal HD At Startup - IBook G4

Nov 11, 2008

My iBook G4 (see sig below) has an intermittent problem. It usually sits on my desk, plugged into the power adaptor, always on. The only time I ever do a shutdown is when I'm taking it with me to the airport. Here's where the problem happens -- WHEN it happens. I start it up and one of two things happens:

1. I get the old question mark disk icon, or
2. I get a plain grey screen

Sometimes, if I do a manual force reboot (cmd-ctrl-power) several times in a row, it will finally boot correctly. The lovely grey Apple logo shows up, and all is well.Other times, when that fails, I boot from a DiskWarrior CD. Sometimes it can't see the internal HD. Other times it sees it, and when I run DW, it does find errors to fix. Yet other times, DW sees it, and finds NO errors.

When the iBook is working, the internal HD's SMART status shows as Good.So, whatup with this? Is the drive actually going bad (SMART status notwithstanding), or is it maybe the controller or some other logic board component? I could chuck the iBook and get a nice new MacBook, but this 2004 antique still suits my needs.

P.S. BTW, the internal HD backs up to an external FW drive daily, so there will be minimum heartache if/when the thing totally bites it.

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MacBook Pro :: Unable To Play Startup Sound?

Feb 1, 2012

for some reason, my Mac doesn't play a startup sound when ever its booting up and the volume is on max.I'm running Mac OS X 10.7.3 (Lion)

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MacBook Pro, Mac OS X (10.7.2)

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MacBook :: Keep Getting Message Startup / Unable To Do Software Update

May 1, 2012

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May 13, 2012

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PowerPC :: Powerbook Freezing During Startup / Unable To Eject Inserted Cd

Nov 6, 2010

Hi, just wondering if anyone could give me some diagnostic tips with a very unhappy powerbook. I�ve tried the Apple support pages, but they didn�t do the job so I thought I�d look for some helpful experts � I will be immensely grateful if you could help me figure out what�s wrong.

It�s a G4 Power book, running OS 10.4. It suddenly froze on me one day, so I held down the power button to reboot and it hasn�t worked since. One thing that I guess could be relevant is that it was pretty much out of disc space � it had flashed up the warning a few times in recent days and I was in progress of doing a clean up when it went.

What I�ve tried so far:

Normal power up:

Result: Chime, apple logo and spinning logo appear. Stays that way for 4 mins, until screen goes darker grey and �You need to restart your computer. Hold down the power button for several seconds or press the Restart button.� message appears.

Safe boot (with progress status) � power up holding shift-command-v:

Result: Chime, apple logo appears, nothing else. Stays like this for ~30 mins until I give up and power down.Reseting PRAM and NVRAM � power up holding command-option-p-r

Result: Chime, then restarts and second chime, then does exactly the same as the normal power up.

Next step recommended by the Apple Support site is to start directly from the OSX installation disc � but my powerbook already has a CD inserted which I am unable to eject.

Any tips � how can I eject? Could the safe reboot take more than 30 mins (bearing in mind it didn�t give me any progress indication)? Anything else I should try?

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Oct 20, 2009

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Apr 16, 2012

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Jul 20, 2010

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Jun 11, 2012

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Sep 22, 2010

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Jan 12, 2011

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Following some advice I found in this forum I got out my old OS disks to boot from the disc instead of the hard drive. I intended to archive the old hard drive and install my latest OS (10.4.6 on the disc, 10.4.11 was the version I had been running on the machine, I believe). The machine told me it needed 4.5 Gb to install 10.4.6 Tiger, but I only had 4.0 Gb left on the hard drive. So instead, I archived and installed with the OS that came with the computer originally, 10.3.4.

I got things going, did the archive and install, and got to the log in screen. Unfortunately, I could not remember the password, so I booted up in single user mode, and entered the following to get into the machine:

1. mount -uw /
2. rm /var/db/.AppleSetupDone
3. shutdown -h now

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Mar 23, 2012

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Info:
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