Grey screen, keys out of order

Hello and ...help, hard drive problems!!
My iMac G4 with 10.2.8 was acting strangely - Word & Excel wouldn't work, long spinning beach ball. Upon restarting got stuck at the grey screen with the spinning cog. I have tried a variety of suggested fixes without success. Using disk utility ended with messages such as "disk not mounted" and "keys out of order" in red print. Repair completed was indicated but no joy with startup. Started in Single user mode, tried fsck - same "keys out of order"(4, 3140) & Volume can not be repaired.
When starting with a firewire link to my iBook the message was "you have inserted a disk containing no volumes that MacOX can read. Am i looking at a. Full reintitialising or
b. a new hard drive
Is there a way to retrieve any files??
Thanks in advance
Geoff

I don't know if Disk Warrior will cure all your problems but it is known to fix "keys out of order" problems and to rescue hard drives that seem impossible to fix.
Here is more information about this program:
http://www.versiontracker.com/dyn/moreinfo/macosx/19441
So I would certainly try that first. It is a great utility to have around so would not be a waste of money even if you do have to replace your hard drive.
If you don't get your hard drive running again the only way to get your files is from a disk retrival place which is very expensive.
Renae

Similar Messages

Weird "keys out of order" problem

So, keys out of order was new to me, but I've read up about possible fixes... My situation seems strange, here's why...
I was working on my dual 1.8 G5, 10.4.11, clicked on a video link, then got the greyed out screen, and the multilingual restart message.
So, I did several restarts, but the fans would go to full, and it would shut down before showing any activity on screen. So I entered single user mode, and typed the command for checking the disk (thankfully I could get info from the web on my macbook). That's when the 'keys out of order' message was first seen. After reading up I tried to run the fsck thing, which I read could be an option. I got an 'unable to repair' message. Then I put my workmates machine into target disk mode and started from that disk and tried to run disk utility over my startup disk, of course it didn't work, with several warnings in read about keys out of order etc.
So I'm learning that DiskWarior is probably my best bet, but in the meantime I put my machine in target disk mode, and using a handy hint I found online, dsragged out my g3 iMac, booted it into OS9, extensions off. Connected by firewire, my G5 HD showed up and I was able to drag off some recent files, Mail folder etc. (At this point let me say I did a system back to a DMG file on a separate partition of an external USB drive several months ago, and that maybe 99% of my work and important files are on another external drive, so it's not life and death here.)
NOW... comes the strange part. I go back to my machine, and just for a lark try to start it up again.... and it starts up fine, no problems, everything normal. Wow I think, I'll go and run disk utility over it now, so I restart using my friends powermac, and run said program, and get exactly the same errors, keys out of order. hmmm.
So I go back to my machine, restart using its own system, all good, all fine. So I plug in another external HD and do a clone of the internal drive while its all working fine.
So, since then its been running fine, (about a day and a half). But what should I do, and what's going on? Should I reformat my drive and out the earlier cloned system on it? Would the recent system clone I did likely be corrupt? Does it seem right that my system should work OK now, when Disk Utility was still reporting keys out of order? Should I pony up and buy DiskWarrior? (can't really afford to to be honest)
I'm a bit flummoxed, thanks for any help...

Hi, weird but not completely inexplicable.
Indeed Disk Warrior is your best bet, IMHO every Mac oener should have it.
I wouldn't completely trust any clone/backup once you get that error.
Generally the only real fix for that error is DW, or Zeroing your drive & reinstalling.
http://supportdb.alsoft.com:591/FMPro?-db=alsoftsupport&-lay=main&-max=15&-forma t=AlsoftSupport-qa.html&-script=counter&-token=182&-Skip=101&-find

"Underlying task" + "Keys out of order" + Not turning on

I've been running my Powerbook G4 for the better part of two years now, and now that my one year Apple warranty is conveniently expired I'm having repeated problems.
A few weeks ago I had the first problem, which was a complete system freeze. I shut down from the power button and from then on I couldn't start up the OS (spinning wheel on startup screen).
I sadly found no solutions after trying to boot from the install DVD and using the Disk Utility ("The underlying task reported failure on exit" when I tried to verify/repair disk, as well as repairing permissions.), so I erased the entire harddrive and then reinstalled. (I had to do this twice because the update to 10.4.9 made my applications not work, but I figured that problem out and got everything working and in order).
After getting all my applications installed again, and registering them all, everything seemed fine. Everything worked for the next week or two, and then the system froze again. After waiting in silent horror for a few hours I decided to use the power button again. NOW, the computer will boot up, everything seems normal at a glance. But you cannot open finder, or most applications, and when I open Firefox I get a very nice pattern of strange "u" shaped symbols.
I did the whole Install DVD disk utility shpeel, and successfully repaired permissions. Next, I tried to repair the disk and recieved something like "Keys out of order". After trying for a few minutes to repair a C-tree of some kind, the disk utility spits out a "The underlying task reported error on exit" message. Frusterated, I found something on the internet that told me to try "sbin/fsck -fy" in the single user mode. So I restarted and tried to enter single user mode, and the computer shut off at the grey apple screen.
Now I can't get past the grey apple screen, whether its with cmmd + S, cmmd + c, or just normally. It just shuts right on down.
I've tried taking out the battery and A/C connection and then turning it on, but still no luck. Also, I havent found any solutions for this on the web.
Luckily, I have all my music and other important files on an external firewire drive.
ANY help would be greatly appreciated.
Apologies for such a long rant.
Cheers
Powerbook G4 Mac OS X (10.4.9)
Powerbook G4 Mac OS X (10.4.9)

I managed to boot the computer with the option + power button so I can access disk utility now.
The S.M.A.R.T status of the drive is "Verified".
I'm working on getting a copy of DiskWarrior right now, hopefully that resolves the problem.

Invalid leaf record count, keys out of order?

Yesterday I returned home from a month long trip which I did not bring my 13 inch 2011MacBook Pro on.
I plugged it in and turned it on, and connected my phone to it so i could retrieve some photos. I looked away and looked back to see the grey "You must hard shut down your computer" error message. Possibly because i think the phone may have been disconnected without being properly ejected? So i turned it off and then later the next day, when I try to turn it on it is stuck on the white apple loading screen forever. When I startup with Command+R and enter disk utility, it tells me:
Invalid Leaf record count, keys out of order, volume could not be repaired. When I startup in single user mode and use fsck -fy it tells me the same.
I got it used less than a year ago. I have some pretty heavy applications like MS Office, Photoshop and a few other adobe applications, and The Sims 3.
Help!

When Disk Utility can't repair a hard drive, with an error like that, many buy Disk Warrior to do the repair. You can see an answer on the Disk Warrior site here.
Or, if you have a system backup, erase the hard drive (I would probably do a secure erase and write zero's to the hard drive) and restore it.

PowerBook doesn't boot. Keys out of order?

A few weeks ago my powerbook's keyboard stopped working properly - unresponsive or nonresponsive keys. It seemed to right itself after a couple of boots.
Last time I was using it (weeks of use later) it started to make a high pitched whine and I had to shut it down using the power key as nothing else would work. I have not since been able to boot it up. The boot process gets as far as the 'bong' and the grey screen with the spining time cog and then the screen goes black and it goes off.
I have just tried running disk first aid from the installation disk and got the following message:
Disk utility stopped repairing "macintosh HD" because the following error was encountered:
The underlying task reported failure on exit OK (the blue button)
I noticed in the report box the following:
in red-
Keys out of order
in green-
Rebuilding catalogue B-tree
The first aid got no further than this
Please can somebody help me?
Has my drive failed? Is there any thing else I can try to do with my installation disk or do I have to resort to target mode to try to rescue my files before flinging it through the window?!

Hi, Christie. If you're planning to fling your Powerbook out the window, please be sure to open the window first, and give me time to get out there in the yard to catch it before it lands.
What you need is DiskWarrior (the best option) or TechTool Pro, which should resolve the "keys out of order" problem in your hard disk directory in just a few minutes. That problem may have been caused when you forced the machine to shut down after it began to whine, or it may have been present beforehand. Directory corruption of that kind is most often caused by abnormal operations like forced shutdowns and freezes, but it can also cause them later on if it isn't corrected. A failing hard drive can also cause its own directory to be corrupted, and bad RAM and other hardware faults are also possible causes of directory damage. But much more often the culprit is just a one-time glitch in software that can be remedied using DiskWarrior or TTPro and won't soon recur (as it's likely to do very soon if there's an underlying hardware cause).
If you have a complete, recent backup of your hard drive, another option to consider is erasing the drive completely and restoring everything to it from your backup. That too will write a new, undamaged directory to the disk, but it's more tedious than using DiskWarrior or TTPro. Of course it's also free.

Keys out of order?

i think this is a command line question. i recently unplugged my B&W G3 so i could use the space to play with my new (to me) G4. i also "borrowed" some RAM from the G3 to install in the new machine. when i tried to hook up the G3 again, it would not load anything. i did the usual 'zap' and 'option' dance, which did finally bring the beast to life, but it would go to black screen where i would get "root". i know very little about Mac OS command line, so i didn't try to do anything there. i would type 'exit' which would give me a run down of the start-up POST and end in a "panic, stops here" line [sorry, not the exact term, but your get the idea].
so i put in the OS install disk (OS 10.4) and run the first aid utility to see whats up. i get a red line that reads "Keys out of order, needs repaired". what does that mean? i ended up erasing the hard drive and am now reinstalling the OS, but was wondering what mistake i may have made to crash the system in the first place.
Message was edited by: rtabish

The "keys out of order" message indicates your hard drive has file directory corruption. Disk Utility can't fix, but usually DiskWarrior can. I don't think the RAM removel/reinstall could have cauised this problem.
Besides using DiskWarrior, the only other option is to erase & reinstall the system which you have done.
 Cheers, Tom

Keys out of order - reinstalling OS X or get Disk Warrior - Advice?

My nightmare is below but before describing it, I'm at this point in the problem: using an IBM laptop I've already logged into my 800MHz Mac G4 using Target mode and extracted all important files using HFS Explorer. Now I need help on what to do next so that I can try to save myself from having to reformat the Mac's hard drive. The full story:
I ran 5 Apple software updates (listed below with approximate versions from my recollection) and the Mac installed them fine but rebooted to a blank blue screen. The OS level before running these updates was v.10.4.10 ...
Apple OS X version 10.4.11 update
QuickTime v. 7.5.1
Java Console update
iTunes 8.0.1
…and one other minor update program.
... after several reboots I found that the Mac was pretty much gone. The error message I got in verbose mode was: "keys out of order, (4, 726)". I started the Mac in Single User Mode and ran several variants of the fsck command (-y, -fy, etc.) about 4 times each and no dice - the message I always got was: "Rebuilding catalog B-tree"... followed by: "volume could not be repaired". The Mac will not boot from the Mac OS X CD and I already tried holding down the "C" key trick but no dice there either. The only thing I haven't tried yet is typing "boot cdrom" at the Apple Firmware prompt - and wanted to ask if anyone thinks this might actually boot the OS X CD (?)
At this point my real question is how to preserve the programs & files on the Mac and get it back working, if possible, without having to reformat the hard drive. I did not purchase Disk Warrior because the Mac won't boot the OS X CD using the "C" key. The Mac will eject the CD tray and I can insert the OS X CD but the CD never spins up and the Mac spits the CD out and then shuts itself down. If the "boot cdrom" command will work in the Firmware, then purchasing Disk Warrior becomes an option. I see my options right now as the following. Anyone know which option is best to reduce the headache factor and save the wallet.
1. If "boot cdrom" using Apple Firmware will in fact boot a CD, will using Disk Warrior preserve the Mac's installed programs (Adobe Suite CS2) once Disk Warrior creates the new hard drive volume?
2. Use "boot cdrom" using Apple Firmware and re-install OS X (will Adobe Suite still be installed?) Yes, it's a legal copy of CS2 but the install CD is not at my house and will take a week to get.
3. Reformat the hard drive, install OS X and reinstall Adobe Suite, reconfigure my wireless settings, etc. and all the other stuff you have to do after a hard drive has to be reformatted.
4. Take it to the local Apple Store
5. ??? Any other options out there ???
Thanks in advance.
RPQ

Thank you for the replies. Here is the final outcome on this one: a bad hard drive. The verdict from a local Apple authorized service center was that it was a coincidence that the hard drive (made in 2001) pretty much failed at the point when I was running the 5 updates. On their test bench, my Mac would not boot from the OS X CD or a DiskWarrior CD, but, it would boot from an external hard drive. I was told the CD-ROM drive and hard drive are on separate buses so the service provider did some testing with a new hard drive and the old hard drive. They were straight with me and everything they tried made sense because they were the same problems that I encountered when trying to fix/diagnose the Mac. In the end, they installed a new 250GB hard drive, installed OS 10.4.6 and gave me the old hard drive back – on which I still can access all the old files just in case I missed any with my original copy job to my laptop using HFS Explorer. $169 total bill. Not bad.
I still think there is probably a way to clone the old hard drive but that could have run up the labor charges and by that time I could have purchased another entire (used) G4. So the only real loss is not having the Adobe CS2 suite of programs installed but I can still get the install disk if needed. Now sitting in my update list is: the Apple update to OS 10.4.11… the minimum OS system requirement to get a brand new Nano to work on a Mac. My fear is that running that update might cause the same Keys out of Order issue on this ol’ Mac so I’m thinking that I’m not going to install any more updates – just in case!

Hard drive verification keys out of order

Following a period of very slow reponses and some screen flicker I ran disk Utility and on verifying my hard disk (a single volume) I got the message while it was checking the Catalog File saying 'keys out of order' The underlying task reported failure on exit' followed by 'the volume needs repair'. I used my system CD to try and repair the volume but got the same message. Can anyone tell me what it means and what I should do?
The machine appears to be working OK otherwise and the slow responses and flicker have sorted themselves but Disk Utility still thinks there is something wrong. I have Tech Tool pro but am a little wary of running it having heard a few horror stories.
Thanks

If you don't have a backup, do that. If you have Disk Warrior, try it, but I think TechTool Pro 4.5.1 should be fine. But always backup first.
Start using an emergency clone / system drive. Either internal (there is room for four drives after all) or FireWire (might want FW800 card and case which run as well as the ATA/100 bus).
You can always boot into single user mode (command s on startup) and at the prompt, follow the line of instructions above about typing in "sbin/fsck -fy" to fix and repair the drive. But, in a case like yours, you should be using Tiger DVD 10.4.6 and may need 3rd party utility. So I'd upgrade TTP if you have not, and buy some disk drives.
But, I would never "it seems to be working" assume that it is or that it won't get worse - it pretty much has to get worse.
Throw out what you don't need, remove what you have backed up, remove cache folders, and make sure you have at least 20% free space.
My guess, with TTP4 and people having problems, it is rare, they didn't have a backup. DW seems to be - in over 6 yrs of use, the safest. It does one thing, and the only time it has trouble is the drive doesn't have room to write a new repaired directory, or it takes too long to scavange a drive.

Keys out of order - help!

Hi, all I hope osmeone can help:
Background: I run 10.3.9, have 1.12 GB RAM, and use Adobe CS2. Try to maintain about 10GB hard disk space, using an external drive for storage. InDesign has been a little buggy, strange resetting of defaults, crashes when exporting, tried the usual repair permissions, run sudo commands, helps some but after a strange hanging (repair permissions lost contact with Utility Manager) I tried running fsck -y and fsck -f and got some error messages. On restart, I got something like "restart your computer immediately" after my desktop opened and I tried to start an app. I booted from the CD, ran DU and the computer seems fine BUT>>>>>>BEFORE I mess around again as a single user (I am intrepid, but not knowledgeable)
HEre is the message I got before I booted from the CD(as best as I could copy).
/deo/rdiskOs5
Root file system
Checking HFS Plus volume
Checking Extents Overflow file
Checking Catalogue file
Illegal Name
Illegal Name
diskOs5: I/O error
Keys out of order
(4,36067)
Rebuilding Catalogue B-tree
diskOs5: I/O error
The Volume MacHD could not be repaired
I have been working in InDesign on one document and all seems okay, but after reading some of the forums, I'd like to be sure.
NOTE: sometimes I get a soft grinding sound when the computer is starting up, it is intermittent. I can't afford a new computer or lots of software at the moment, and I hope someone can help!

annexit:
if I download it and there is no software to make it a startup disk, what can I do? Can I install it on another computer and firewire them or something?
I am assuming that by "it" you are referring to Disk Warrior.
If you download the file, you will not be able to boot from the downloaded file. However, as you correctly anticipate, you can install it on another computer and run the tests in Firewire Target Disk Mode.
• Download Disk Warrior.
• Install DW on a second Mac.
• Connect computers via Firewire.
• Start up other (Host) computer and log in
• Hit power button on affected computer (Target) and immediately after chime hold down the "T" key. The firewire symbol will flash on the Target computer screen and the Target HDD will mount on the Host computer's desktop as a Firewire Drive.
You are now ready to launch and run Disk Warrior.
Please do post back with further questions or comments.
Good luck.
cornelius

Catalog B-Tree: "Keys Out of Order"

One day my ibook G4 suddenly stopped working. It started up, but there was only a blue screen. The cursor worked, but the desktop, dock, everything else was gone--nothing to click on.
I went to Apple support and discussions and followed info given there:
I ran the Hardware Test disk: It said everything passed. After that the apple and start-up window appeared, but it stopped, usually after "Starting Network..." came on, then it would become an all blue screen once again...and the cursor was frozen in the upper left hand corner.
I reset the PMU and tried to run the software restore disk, (shutdown and restarted holding "C" down). This time the start up got as far as "...time synchronization..." then stopped and went to blue screen again. (The disc icon didn't come up on screen, nor did it just start working as the Hardware Test disc did.)
After more research in the discussion groups, I started up in single entry mode and ran an "fsuk" check. It gave the "Catalog B-Tree: keys out of order" and Macintosh HD cannot be repaired message.
Then I read that if you have an "Extended" journal (or ?) the fsck might give benign error messages. So I don't know if the Catalog B problem is correct or not.
Further research led me to "Computer stops responding at "starting Network Filesystem" which is exactly where it stopped before I reset the PMU (which I understand resets the clocks).It suggests there is an NFS export Loopback problem and says to restore my network.nidb file from a good backup (what would that be?) or delete or modify the mount(s) causing the issue (also clueless as to what that might be).
I am hesitant to do anything else. (One bit of info said that if there is a file directory issue such as Catalog B, running and Upgrade or Archive and Install might worsen the problem.)
Can anyone here let me know what I should do, or if this is a fixable problem?
Thanks!

What Format is the Disk?
If it's HFS+ hen DiskWarrior® stands a good chance of fixing it, much better than fsck anyway.
Don't trust the Apple HW CD... it's next to worthless for finding problems last time I used it.
You can also pull ALL yhe Batteries and AX, let it set overnite, to reset everything.
If the HD is really shot, then you'll need an external HD and one of these...
http://subrosasoft.com/OSXSoftware/index.php?mainpage=product_info&productsid=1
http://www.prosofteng.com/products/datarescueinfo.php

Keys out of order -- follow up to earlier post

I ran the install disc Disc Utility Test and the Hardware Test disc on the computer since I posted my first question earlier tonight "Computer won't finish start-up -- any suggestions". The Hardware Test came back fine. The Disc Utility test on the install disc says: Keys out of order. It does not, however, explain how to repair this problem on the hard drive.
Is there any way to fix this problem on the hard drive?
Power Mac G4 Quicksilver Mac OS X (10.3.9)

Invest in DiskWarrior. I had the same problem and DiskWarrior fixed it. No other utility programs worked for this problem. DiskWarrior is very inexpensive. Ordered online in the afternoon. It was delivered to my office the NEXT morning.

I have an iMac mid 2010. After Disk utilities said the drive was corrupt, I ran the hardware test (extended) 3 times. No problems. I than ran Disk utility again and got 2 messages in red-keys out of order, and --Volume corrupt, can't be repaired. I tried

I have an iMac mid 2010. After Disk utilities said the drive was corrupt, I ran the hardware test (extended) 3 times. No problems. I than ran Disk utility again and got 2 messages in red…keys out of order, and ……Volume corrupt, can't be repaired.
I tried to do a system install, but message said…disk can't be changed. Will a complete erase and install fix this ?
Everything is backed-up.

There's hardware and software.
Your drive could physically be in good condition but something has caused the file structure to be messed up (it just happens sometimes). The directory that keep track of files is corrupt. Disk Utility can help determine if that is the issue. In some cases it can repair the problem but it cannot do it to a drive that is being used to boot the system while you are doing that. You have to boot from another drive. Some things DU cannot repair and you need to try a stronger utility such as Diskwarrior.
A failing hard drive (one with mechanical issues) can be a cause of file structure issues but this is by no means always the case. Apart from looking at the SMART diagnosis feature of Disk Utility (and smart isn't totally reliable) there often isn't a way to tell if a drive is failing until it suddenly happens, which is why you need to maintain backups.
In your situation it does sound serious and not just minor directory corruption. You can try erasing (formatting) the drive, You may need to do this if it is really corrupt, in which case there could be underlying physical issues. I use old technology but if you have the patience you can try erasing the drive with the security option of writing zeros once (don't do more unless you are going on a 3 week vacation). This makes the drive not simply assume everything is okay by forcing it try every part of the drive by writing data. If something is gong wrong you may find it marks a lot of bad sectors, or flat out refuses to format. Then you know you need a new drive.

"Keys out of order" message in Disk Utility

Hi,
I was just doing a regular maintenance check with Onyx and to my surprise it said I needed to repair the disk using the Installer DVD and Disk Utility.
I did this and again to my surprise I seem to have a problem.
After the whole processs is complete these messages come up:
"keys out of order" (in red)
1 HFS Volume repaired (in green)
1 Volume could not be repaired (in red)
I don't know what to do about this. On the one hand my system seems to be running fine, but on the other if these errors are coming up then surely there is an issue which I need to resolve.
Could someone enlighten me on what to do next?

Hi,
Thanks. Unfortunately my battey died and now I am stuck on the apple logo at reboot. Opening disk utility via the install disk doesn't work as disk utils doesn't recognise any disks (even though I hear them spinning)
I am lucky in that I am able to access th powerbook's HD in target mode via firewire on my G5
so I am going to copy over a lot of my data and then invest in Diskwarrior.
However, I am a little confused with the Diskwarrior website. I would prefer to download as I am not near a shop to buy the software and I would rather not pay for express amazon delivery.
Would I be able to use the download of diskwarrior on my Powerbook?
It seems a little confusing:
"If You Are Purchasing DiskWarrior
Repairing your usual startup disk requires that you start up from another disk. In order to use the download copy of DiskWarrior, you will need to start up from another disk with Mac OS X 10.3.9 through 10.4.x installed. You will then need to run a copy of DiskWarrior from a disk that is not the disk you are repairing. (The DiskWarrior download does not include the Apple System files necessary to create a startup CD.) If you cannot use the download version of the software (i.e. you have only one internal hard drive and this is the drive you wish to repair), please order directly from our sales department or from one of our resellers to be sent the software on CD. If you order via the secure server, you will be sent a CD, but delivery of your CD will take approximately three to four weeks, depending on your location."
Basically I am in a hurry to get my Powerbook working by Thursday my two options are
a)Buy from Amazon and pay extra to get express delivery by wednesday
b)Buy download from Alsoft (with cd version on way in 2-3 weeks)....however if the download version is not sufficient then i'm screwed.
I'd really appreciate help here. It just happens that I have to work away on Thursday....and I therefore need my powerbook. I usually use my G5 in my home studio.
THANKS!!
Message was edited by: recall

Macintosh HD can't be mounted, keys out of order and repairing can't be completed

Hi,
English isn't my mother tongue so I'll make my best to be understood.
I have a Macbook Pro from 2012, running on Yosemite (latest version). I installed Onyx which told me my disk needed to be verified and repaired. Following this advice, I restarted my computer with Disk Utility and completed a verifying and repairing. Which led to a terrible outcome. Since then, everytime I boot with my user on my Mac, my computer shuts down in the middle of the progress bar. I tried to find an explanation to it and fix it, so I tried the following things:
1) I booted with CMD + R to go into Disk Utility
2) I runned a verify Disk on "Macintosh HD" Core Storage Logical Volume Disk, which didn't give me any error
3) I unlocked "Macintosh HD" Mounted encrypted partition and runned a verify disk, which says :
"Keys out of order
The volume Macintosh HD was found corrupt and needs to be repaired.
File system check exit code is 8.
Error : the disk needs to be repaired, Repair disk."
4) Unfortunately, the "repair disk" button is grayed.
5) So I runned repair Disk on "Macintosh HD" Core Storage Logical Volume Disk, which didn't give me any error.
6) I tried to boot my computer again but it still shuts down when trying to open my user.
7) Did all the same process again, but now the error is "Keys length incorrect" and repairing is now always blocked in the middle of the progress bar.
Is there any way I could extract the data I care about (photos, etc.) before erasing the disk or buying a new one?

There's hardware and software.
Your drive could physically be in good condition but something has caused the file structure to be messed up (it just happens sometimes). The directory that keep track of files is corrupt. Disk Utility can help determine if that is the issue. In some cases it can repair the problem but it cannot do it to a drive that is being used to boot the system while you are doing that. You have to boot from another drive. Some things DU cannot repair and you need to try a stronger utility such as Diskwarrior.
A failing hard drive (one with mechanical issues) can be a cause of file structure issues but this is by no means always the case. Apart from looking at the SMART diagnosis feature of Disk Utility (and smart isn't totally reliable) there often isn't a way to tell if a drive is failing until it suddenly happens, which is why you need to maintain backups.
In your situation it does sound serious and not just minor directory corruption. You can try erasing (formatting) the drive, You may need to do this if it is really corrupt, in which case there could be underlying physical issues. I use old technology but if you have the patience you can try erasing the drive with the security option of writing zeros once (don't do more unless you are going on a 3 week vacation). This makes the drive not simply assume everything is okay by forcing it try every part of the drive by writing data. If something is gong wrong you may find it marks a lot of bad sectors, or flat out refuses to format. Then you know you need a new drive.

What now? I got repair failed "Keys out of order" and "Invalid extent entry"

What now? I tried to verify & then repair disk and I got "repair failed" "Keys out of order" and "Invalid extent entry"

You've booted from your OS installer disk, ran Repair Disk from Disk Utility? If so then you need a stronger disk repair utility like DiskWarrier to rebuild the directory.
BTW, update your profile information.

Grey screen, keys out of order

Similar Messages

Maybe you are looking for