Disk Utility repair and Mac OS X Install Disc not at hand

Help needed!
If i click "verify" in Disk Utility, i get "The volume Macintosh HD needs to be repaired." as answer. However "repair" needs to unmount the volume which is not possible because it's the system/boot partition.
Currently, I dont have access to my mac os x install disc (DVD), which could be used to boot from and run disk utility. The dvd is locked away in my office in another country.
Is there a way around this? Either by running disk utility's repair function while the system is booted or else by manually creating a boot cd/live cd?

Yes, possibly.
Boot into single-user mode. After startup is completed you will be in command line mode and should see a prompt with a cursor positioned after it. At the prompt enter the following then press RETURN:
/sbin/fsck -fy
If you receive a message that says "*** FILE SYSTEM WAS MODIFIED ***" then re-run the command until you receive a message that says "** The volume (nameofvolume) appears to be OK." If you re-run the command more than seven times and do not get the OK message, then the drive cannot be repaired this way.
If you were successful then enter:
reboot
and press RETURN to restart the computer.

Similar Messages

Mac OS X install disc not installing drivers in Windows 7

So I just installed Windows 7 Ultimate OEM 32 bit, and everything went (relatively) smoothly...
The problem is that now I'm at the desktop and when I insert the Mac OS X install disc, I am not able to install drivers. Instead, I am prompted to either "remote install Mac OS X" on my MacBook Air or install DVD and CD Sharing on my MacBook Air. I don't own a MacBook Air nor have I ever used either the Windows 7 install DVD or the Mac OS X install DVD on a MacBook Air. What's going on, and how else can I install the proper drivers? Also, please note that I used the Mac OS X install disc to install drivers for Windows XP previously. Long story short, that installation expired (lost my CD key) so I had to start over with Windows 7. I know the drivers are there, why aren't they working?

Sorry to state the obvious first, is it a Snow Leopard DVD?
You can always browse the DVD to the correct folder for the drivers.

MacBook Pro failing to boot up despite disk utility repair and PRAM

Problem: MBP frozen on boot up screen with Apple logo and turning gear (which freezes after a while aswell)
Solutions attempted: disk repair via custom recovery- disk utility, PRAM
Device: MacBook Pro 15" (early 2010) running 10.9
Additional info-
Never had any issue with the device and this seems to have happened all of a sudden. Installed an SSD a few months ago, and just realised the ssd did not have a recovery partition. However I connected my older hardrive via USB to access recovery which seemed to work fine.
NOTE: for the past few weeks, every now and then I was unable to power the device off and whenever this occurred, there seemed to be a few bugs (ie unable to empty thrash-error 50 and enable to increase/decrease volume/screen brightness). However, holding the power button and restarting it seemed to have fixed it.
Had the same issue but this time around MBP failed to boot up.
Any possible suggestions?

Ranban wrote:
Are you suggesting reinstalling the os?
No.
Furthermore, is there a way to keep the data intact using this method? Or retrieve it at the least?
Repairing a disk should have no affect on the data, nor would an OSX installation. However if the data has value, there always should be a backup, preferably two.
In your original post you said "attempted: disk repair via custom recovery- disk utility". The term 'custom recovery' to me is alien and thus confusing.
What I am suggesting is a repair of the HDD using the original installation disk, not an OSX installation.
You insert the disk holding down the C key at startup. Proceed with the process until you see on the top of the display a menu bar. Select UTILITIES and from the drop down menu select Disk Utility. Then select Disk Utility>First Aid and then run Verify and repair. Exit from the installation process.
That way I know that the attempted repair was properly executed. You may have in essence done that, but there is an element of doubt in my mind.
Ciao.

My MacBook Pro started running very slow. I did disk utility/repair

My MacBook Pro started running very slow. I did disk utility/repair and it helped but still very slow. Repair gave me this message, "SUID file 'System/Library/CoreServices/RemoteManagement/ARDAgent.app/Contents/MacOS/ARDAg ent has been modified and will not be repaired." Any suggestions on this message and/or what else I can do to get my computer back to the way it used to run? Thank you!

It says 199.15 GB free of 499.25 GB. Can I remove the Remote Management program to solve the other unrepairable problem?

How do I do this: "This disk needs to be repaired. Start up your computer with another disk (such as your Mac OS X installation disc), and then use Disk Utility to repair this disk?"

"This disk needs to be repaired. Start up your computer with another disk (such as your Mac OS X installation disc), and then use Disk Utility to repair this disk."

Stick the disk in, reboot holding c.
Disk Utility is a menu option about the 2 or 3rd screen in the installer. (don't install OS X!)
Because your booted form the installer disk, you can repair the disk.
Quit and exit the installer and reboot.
If your drive is not repaired, make a note of all what it says, for Apple to use.
Reboot and get your files off to a external drive,
Take the note and your comptuer to Apple for a warranty/Apple care call, they will replace the drive.

I just restarted my mac then suddenly when it boots,disk utility came and says different option like repair disk, get help, reinstall OSX and I tried to click disk repair but it says that I am um able to repair the disk

i just restarted my mac then suddenly when it boots,disk utility came and says different option like repair disk, get help, reinstall OSX and I tried to click disk repair but it says that I am um able to repair the disk

It sounds like your hard drive either has a software problem that Disk Utility cannot fix or that the HD has failed (mechanically).
Your Mac may have booted either to your recovery partition or to internet recovery in an attempt to repair the drive- I can't tell from your post.
I'll assume that it was the recovery partition.
Try to boot into internet recovery (hold down option command R at restart), and see if you can repair your HD with Disk Utility. You should also repair permissions while you're there.
If that doesn't work, try to boot into single user mode (restart, hold down ⌘S until you see a black screen with white text) and repair your hard drive. Here's a reference with directions: Repair Your Hard Disk in Single User Mode | Everything Macintosh
If that doesn't work you have a few options:
If your mac originally came with installation disks, you can try to boot from the installation disk and then see if you can repair the HD.
There is a small chance that Techtool Pro 7 will be able to repair your HD if Disk Utility can't.
If none of that works then your HD has probably failed and will need to be replaced, which is not too difficult to do yourself if you can use a screwdriver.

TS2570 Question re: "Start from your Mac OS X Install disc; use Disk Utility"

I've worked my way through the step-by-step trouble shooting in the TS2570 article up to "Start from your Mac OS X Install disc; use Disk Utility". So far, every step results in the same outcome - my formerly trusty 2007 Intel duo core iMac (24") will not start up, freezing on a grey screen with a blinking question mark on a folder. I don't completely understand this next step. I have both a Leopard and a Snow Leopard disc. I'm not positive whether these were for the iMac, or my old Macbook Pro. I assume this makes a difference.

Question (?) Mark, Blinking Folder, or Gray Screen at Startup
These are related but not identical issues. Their causes are outlined in Intel-based Mac- Startup sequence and error codes, symbols. Solutions may be found in:
A flashing question mark appears when you start your Mac
A flashing question mark or globe appears when you start your Mac
Mac OS X- Gray screen appears during startup
In most cases the problems may be caused by one or more of these:
a. Problem with the computer's PRAM - See Resetting your Mac's PRAM and NVRAM.
b. Boot drive's directory has been corrupted - Repair with Disk Utility.
c. Critical system files are damaged or deleted - Reinstall OS X.
d. The disk drive is physically non-functional - Replace the hard drive.
Note that the information I have provided is what Apple recommends, If other users suggest different solutions than found here, then be sure what they recommend does not impact on your warranty, if any, or ability to get continuing Apple service.
Please don't start removing drives or changing cables unless you know what you are doing and have exhausted other non-invasive alternatives outlined here. If you perform any work yourself that is unapproved by Apple, then you will void any warranty you may have and lose all further Apple Support.
Repair the Hard Drive and Permissions
Boot from your Snow Leopard Installer disc. After the installer loads select your language and click on the Continue button. When the menu bar appears select Disk Utility from the Utilities menu. After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list. In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive. If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button. Wait until the operation completes, then quit DU and return to the installer.
If DU reports errors it cannot fix, then you will need Disk Warrior and/or Tech Tool Pro to repair the drive. If you don't have either of them or if neither of them can fix the drive, then you will need to reformat the drive and reinstall OS X.
The main difference if you are using Lion or Mountain Lion is that you must first boot from the Recovery HD. Simply boot from the Recovery HD to perform the above.
Reinstall Snow Leopard Without Erasing The drive
1. Repair the Hard Drive and Permissions
Boot from your Snow Leopard Installer disc. After the installer loads select your language and click on the Continue button. When the menu bar appears select Disk Utility from the Utilities menu. After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list. In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive. If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button. Wait until the operation completes, then quit DU and return to the installer.
If DU reports errors it cannot fix, then you will need Disk Warrior and/or Tech Tool Pro to repair the drive. If you don't have either of them or if neither of them can fix the drive, then you will need to reformat the drive and reinstall OS X.
2. Reinstall Snow Leopard
If the drive is OK then quit DU and return to the installer. Proceed with reinstalling OS X. Note that the Snow Leopard installer will not erase your drive or disturb your files. After installing a fresh copy of OS X the installer will move your Home folder, third-party applications, support items, and network preferences into the newly installed system.
Download and install Mac OS X 10.6.8 Update Combo v1.1.
Reinstalling Lion/Mountain Lion Without Erasing The Drive
Boot to the Recovery HD: Restart the computer and after the chime press and hold down the COMMAND and R keys until the menu screen appears. Alternatively, restart the computer and after the chime press and hold down the OPTION key until the boot manager screen appears. Select the Recovery HD and click on the downward pointing arrow button.
Repair the Hard Drive and Permissions: Upon startup select Disk Utility from the main menu. Repair the Hard Drive and Permissions as follows.
When the recovery menu appears select Disk Utility. After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list. In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive. If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button. Wait until the operation completes, then quit DU and return to the main menu.
Reinstall Lion/Mountain Lion: Select Reinstall Lion/Mountain Lion and click on the Continue button.
Note: You will need an active Internet connection. I suggest using Ethernet if possible because it is three times faster than wireless.

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.

HT4790 My Mac OS Lion 10.7 FileVaulted HD does not boot, prohibitory sign, stop sign appears some minutes after boot starts. Disk Utility repair shows four error messages: Unable to bootstrap transaction group 2517: inconsistent crosscheck (the same with

My Mac OS Lion 10.7 FileVaulted HD does not boot, prohibitory sign, stop sign appears some minutes after boot starts. Disk Utility repair shows four error messages:
Unable to bootstrap transaction group 2517: inconsistent crosscheck
No valid commit checkpoint found
The volume xxxxxxxxxxxxxx(here it shows physical volume number) was found corrupt and can not be repaired.
Problems were encountered during repair of the partition map
Error: Storage system verify or repair failed.
(the same with 2518, 2519 and 2520 transaction group)
I suppose it is serious bug in Mac OS Lion managing FileVault and wonder what the help could be?

Most likely culprit is your Lacie drives which are notorious for flaky power supplies which cause just the sort of erratic behaviour that you describe. Have had similar issues myself. Lacie has been good about replacing my power converter-- twice. If you have seven of them, good luck finding the bad one or more. Like I said, the behaviour is erratic. Sometimes it'll work sometimes not. I can't comment on Samsung drives because I've never used them and have never heard anything about them. Same with Softraid. Why not just use Disk Utility. Sounds like you're ready for an external hardware raid. This will be much faster, much more reliable, and may even be cheaper than seven firewire drives. Check out G Tech, and Maxx Digital for starters.
Best of luck
Terry

Ibook G4 - won't start up, spins, and shuts down... disk utility repair...

ibook G4 - won't start up, spins, and shuts down... disk utility repair quits. says "invalid sibling link" "volume check failed" "1 volume could not be repaired because of an error" "the underlying task reported failure on exit"
any ideas about how to start and/or recover data ??
thanks

Hi chesterday, and a warm welcome to the forums!
You must repair the HD, your best bet is DiskWarrior from Alsoft...
http://www.alsoft.com/DiskWarrior/
You'll need the CD though.
Unfortunately, Disk Utility can't fix all that much, and the only other Apple Options are erasing the HD, or installing OSX to a second drive, then using Migration Assistant to move stuff over to the new HD.

Disk Utility Repair on 10.7 w/o Lion install disk

I ran the Disk Utility and got the message "This disk needs to be repaired. Startup your computer with another disk (such as your Mac OS X installation disc), and then use Disk Utility to repair this disk." My iMac is a couple of years old and came with Snow Leopard OS, however I have upgraded to Lion. So here is my question: will Disk Utility properly repair a Lion startup disk (i.e. my hard drive) using a snow leopard OS installation disk as the start up volume? Here's another twist: can I create a new Lion startup volume to run Disk Utility from that? Thanks in advance and Happy New Year.

Try this:
Restart while holding command-r until you see the Apple. This should put you into the "Recovery Partition" from which you can run Disk Utility.
http://support.apple.com/kb/HT4718
charlie

Hi, i had recently bought a toshiba 3.0, 1.5tb hdd and i had to change the settings through Disk Utility on my mac to be able to transfer files from my mac to my HDD. The problem i am having now is, it wont connect to my TV or PS3? Can someone please help

Hi, i had recently bought a toshiba 3.0, 1.5tb hdd and i had to change the settings through Disk Utility on my mac to be able to transfer files from my mac to my HDD. The problem i am having now is, it wont connect to my TV or PS3? Can someone please help

"....and i had to change the settings through Disk Utility on my mac to be able to transfer files from my mac to my HDD"
What do you mean by that? Did you format?

Disk Utility says everything's fine, but Install disk doesn't find my internal drive as a possible destination. When I startup with Command S, I get a looping "cannot mount errno = 19" message.

Disk Utility says everything's fine, but Install disk doesn't find my internal drive as a possible destination. When I startup with Command + S, I get a looping "cannot mount errno = 19" message.
Problem started when I used Tech Tool Pro 6 to "de-fragment volume". Had to cancel that process before it finished because I ran out of time. Thereafter, when I startup my machine normally, I get the gray Apple logo at first, but it changes to a prohibited symbol (circle with a slash thru it) and hangs.
When I startup holding the Option key, I can see my internal drive, but I get the same results as above.
When I startup using the MacBook OSX Install DVD, it does not find my internal drive as possible destination.
When I startup using the MacBook OSX Install DVD and then run Disk Utility, it finds my drive, allows me to "repair" and says everything is fine.
When I startup with Command + S, I get a looping error message "errno = 19" and cannot stop it to do anything else.
When I startup from Disk Warrior v4.4, it does not find my internal drive to do any repairs.
When I startup from Tech Tool Pro 6 and run the "computer check" diagnostics, everything passes but the Volume Structure, which fails at "Volume Extents (B-tree)." When I use TTP's "Tools" option to run "volume repair" it will show my internal drive and allow me to click the GO button, but nothing happens and nothing changes.
I have a Time Machine backup on an external USB drive, but for as long as the internal drive doesn't mount, I can't use the backup to restore.

It's a false report and should be ignored.
I would not rely on TT as I've already said earlier even before Grant posted similar advice.
I really think the Rigid Disk Block may be corrupted. This holds the partition map and could prevent a volume from being unmounted. Unfortunately, there is no way to fix that without repartitioning the drive which will remove everything. So, before going down this road I hope you have backups or can make a backup.
Drive Partition and Format
1. Boot from your Snow Leopard Installer Disc. After the installer loads select your language and click on the Continue button. When the menu bar appears select Disk Utility from the Utilities menu.
2. After DU loads select your hard drive (this is the entry with the mfgr.'s ID and size) from the left side list. Note the SMART status of the drive in DU's status area. If it does not say "Verified" then the drive is failing or has failed and will need replacing. SMART info will not be reported on external drives. Otherwise, click on the Partition tab in the DU main window.
3. Under the Volume Scheme heading set the number of partitions from the drop down menu to one. Click on the Options button, set the partition scheme to GUID then click on the OK button. Set the format type to Mac OS Extended (Journaled.) Click on the Partition button and wait until the process has completed.
4. Quit DU and return to the installer. Proceed with reinstalling OS X.
5. Download and install Mac OS X 10.6.8 Update Combo v1.1.

Disk Utility repairs permissions; 1 hour later they're un-repaired again.

(March 2009 24" iMac. Lion 10.7.3)
I repair permissions on Macitosh HD (boot volume) every-other week. I've noticed that the same permissions seem to need repair each time. Here are the last seven lines from the Disk Utility window from the May 19 run:
One hour later, I repeated the operation. Here are the last seven lines:
I might be overly sensitive, but I detect certain similarities between these results. In fact, it looks like Disk Utility repairs exactly the same permissions every time and those permissions are corrupted shortly after they are repaired.
What's going on here? Should I be alarmed? Or should I panic?

I'd like to delete this post (if I knew how). There are several other threads on this topic, and other contributors report exactly what I observe. It turns out it's a harmless artifact of upgrading from 10.5 to 10.6 to 10.7, rather than doing a clean install of Lion. This article is reassuring: http://support.apple.com/kb/TS1448
I shoulda searched more thoroughly before posting.

Can Disk Utility repair FAT32?

hi, folks:
I'm jammed up. I need to repair the drive in my PS3. It's FAT32-formatted. Im a Mac user, obviously. Can Disk Utility repair it, or does it only do Mac discs?
Please say "yes" (and mean it!). (Barring, of course, hardware problems, I mean. I understand that if the platter is scratched or the controller's no good, I've had the radish.)
BInky

Grf. This wasn't the answer I wanted, but it's what I needed. Thanks, Kurt. I'm now off on a quest to find a Windows laptop. I appreciate the quick response.
BInky

Disk Utility repair and Mac OS X Install Disc not at hand

Similar Messages

Maybe you are looking for