Unable to unmount volume for repair.

"Unable to unmount volume for repair."
It only does it to 2 of my 4 external disks.
Do I do something wrong ?
Thanx anyone.

You can't risk sawing off the tree limb you are standing on.
Your Mac will not Repair:
• The Boot drive
• A drive with Open files on it
the solution for drives with open files is to do a restart and do not re-open old Applications. The solution for the boot drive is to use Recovery_HD as the "place to stand" and run the version of Disk Utility from there. (this means you are no longer booted from the Mac OS X partition, and the regular boot Volume is then free for full repair.)
If the drive passes Verify, it does not need to be repaired.

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Unplugged my imac by accident and unable to unmount volume for repair

Managed to unplugged my imac yesterday without realizing it was still on. Now when trying to repair the disk I get: unable to unmount volume for repair. I tried to reinstall OS Maverick but it goes to OS X Yosemite telling me that I need to go to the app shop (the OS X Yosemite update never worked) and can't since I am blocked in Utilites. Can you please help? I don't want to lose my files.
I have an IMac 25" 3 years old-on Maverick
Thanks

If the computer will not see the internal HD when you start in the Recovery volume then it may be damaged. Time to take it to an Apple Store or AASP tone looked at.
You can attempt to reset the SMC and PRAM and that may help, if you don't know how do the SMC 2-3 times and instructions are in Intel iMac SMC and PRAM resets

Unable to unmount volume

We have a couple of users who have this problem occur at random times. They will have a bunch of shares mounted but there is one particular share that just refuses to disappear when the user "disconnects" from it. They can still browse the share after that, since it's still on the desktop. But, they get weird permission error messages when trying to copy files to that share when this happens.
Did a search and couldn't find anything. I know if they just reboot, the problem will go away for a while, but it inevtiably comes back.

There's probably a process that's using that share. Spotlight would be a good suspect. A little Terminal work with lsof should confirm/deny it.
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Cannot unmount volume

I was doing a maintenance on my system yesterday. I used DiskWarrior to do a rebuild on all the volumes. All was okay, except for my Mac HD 5 volume. I got this message when I tried to run DW 3.0.2 on this volume:
Repairing disk for “Mac HD 5”
Repair attempted on 1 volume
0 HFS volumes repaired
1 volume could not be repaired
Repairing disk failed with error Could not unmount disk (-10000)
When I used Disk Utility, verify disk volume, it said all was OK. But when I tried to verify permissions, it stopped about 1/4 of the way through. And then gave me a message "lost connection to volume, cannot unmount". Or to that effect.
I then tried TechTool Pro 4.1.1. I did a disk check, and all was okay. But when I tried to do a Volume check, I got this message from TTP:
Volume Structures
Tuesday, July 25, 2006 9:48:01 AM Canada/Eastern
Unable to unmount volume
Volume: MAC HD 5
Mount Point: /dev/disk0s3
Format: HFS+ (Mac OS Extended)
Journaling: Enabled
Case-sensitive: No
Created: 02/17/06 09:13:14 PM
Modified: 07/25/06 09:27:36 AM
Capacity: 79.88 GB
Used: 78.72 GB
Available: 1.16 GB
Files: 170,733
Folders: 41,464
Writable: Yes
Ejectable: No
Removable: No
There are a variety of invisible files, settings, and parameters that the Macintosh file system uses to locate files, free disk space, and for other maintenance and management routines. Damage to these critical data structures can result in lost or damaged files and may even necessitate a complete reformat of the volume.
Completed
Unable to unmount volume
TTP didn't actually complete a volume check. I hit start volume check. And it would just indicate it was complete, without actually every doing a full check.
Hopefully, there is a way of fixing this, without have to reformat the volume.
Also, I cannot startup from this volume. Tried, just got the grey Apple screen.
Thanks in advance.
G4 AGP 1.2Ghz upgrade, 896MB ram, LaCie DVD RW Mac OS X (10.3.9) StarTech USB 2.0 card, 30GB, 80GB, 120GB HDs

Thanks dot. But I figured it out already. The problem was that the "automount volume folder" was deleted from the Mac HD 5 volume (have no idea how). These are invisible files, so I used Tinkertool to make them visible. That's how I realized that the automount file was missing. All the other volumes contained automount files for ALL the volumes (including for Mac HD 5). Except for Mac HD 5. This volume was missing it's own automount file. So I just copied the file over from one of the other volumes. And voila, Mac HD 5 is now bootable, and can be unmounted for volume maintenance.
Everything is working as it was.
G4 AGP 1.2Ghz upgrade, 896MB ram, LaCie DVD RW Mac OS X (10.3.9) StarTech USB 2.0 card, 30GB, 80GB, 120GB HDs

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What I don't understand is this: I originally bought and installed Photoshop CS6 back in March 2013, and it worked fine. Yesterday my hard drive had to be replaced and my computer person salvaged as much of what was on it as he could, but now I have to reinstall Photoshop. 1) Why did it work before and it's not working now? 2) Is there anything I can do that does not involve reformatting the hard drive?

It means what it says. The "computer person" formatted it wrongly/ unsuitably. it needs to be formatted again.
Error "Case-sensitive drives not supported" or similar install error | Mac OS
Mylenium

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"volumeName" on Vserver "vserverName". Reason: Volume 'volumenName' is a snapmirrored volume.
vol size: Flexible volume 'volumeName' size limit set to 8022664413184. Any idea ? Volumes autosize mode is false.

Hi I am not trying to change any setting. I am trying to increase the size of the volume. I understand in case of a Snapmirrored volume the fs_fixed options is ON.But one can always increase the actual volume size using vol size command. Even if I increase the size on ONTAP on the file system side it will show as the size same as source. I understand that. So my question is why is it prevenitng me from increasing the size. RegardsAdai

Has Anyone sent the iphone in for repair for the low volume issue ???

I called apple last week and spoke with a level on support agent. After he could not solve the volume issue they sent me to level two. the level two tech took the call and told me right away that they were going to send me a new phone. I give him my credit card as a deposit so they would send a new phone and when I had the new phone I could then send the old one back. Well after a few days I called to check on the phone and found out he never placed the order and now they say they want to send it for repair some place in Texas. They did offer the rent me a phone for 29.00 while I wait for repair. I told them no rental for me. How bad is that, a hardware issue and they say they are going to send a new phone and never do then they offer a repair and to rent me a phone. I was wondering if anyone had sent in the phone for this issue yet. I do not think I am going to send it in and I think I am going to get my refund while I still can. I just thought I would check to see if anyone had sent the phone in for repair yet and how it worked out.
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Ask the store that repaired it.

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I have Os Lion on my mac book pro, im not a fan of this because i cant run many games, i have the disk for snow leopard my machine came with but i get a error saying "unable to unmount disc" when i try erase my hard drive i just want OS SL back any help?
many thanks Carl.

You must boot from another drive in order to erase the system drive.
Try starting up with Snow Leopard DVD inserted and C depress. That should get you booted from the DVD. Then start Disk Utitlity from DVD and erase the disk then you should be able to install Snow Leopard.
Remember that everything will be removed from the disk when you erase it and install Snow Leopard so backup first.
Allan

Volume needs repair message for second hard drive

I am getting the following message on my second hard drive (This hard drive just has data. OS is on the main HD)
Verifying volume “Mac Second HD”
Invalid Volume Header
Checking HFS Plus volume.
Invalid number of allocation blocks
The volume needs to be repaired.
Error: The underlying task reported failure on exit
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G4 Silverline Mac OS X (10.4.3)

Hi Ketan,
Welcome to the Discussions.
If Disk Utility can't repair it try DiskWarrior. It can repair most drive directory problems.
John

HT6114 i have a mac mini that wont boot up and the screen says unable to find driver for this platform: \ powermac10.2 it also says mac os version not yeet set...how can i fix it

the mac mini wont boot up it says you need to restart yuor computer and that its unable to find river for platform can i download software free from the internet to fix this

What OS were you using on the mini before this problem started? If 10.7.8.9, boot to the Recovery Volume (command - R on a restart or hold down the option key during a restart and select Recovery Volume). Run Disk Utility Verify/Repair and Repair Permissions. Then reinstall the OS.
OS X Recovery
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Client unmount volume problem

Dear Sir,
I get an error "No Space!" and clients unmount volume.
Does it mean that there is no free space on Xsan Volume?
Best Regards.
Dony
Apr 7 03:17:30 xs02 cp: error processing extended attributes: Operation not permitted
Apr 7 03:17:30 xs02 cp: error processing extended attributes: Operation not permitted
Apr 7 03:17:30 xs02 cp: error processing extended attributes: Operation not permitted
Apr 7 05:51:13 xs02 ntpd[215]: time reset -0.198182 s
Apr 7 07:15:53 xs02 dashboardadivsoryd[8852]: fetch: unable to fetch data from read stream while fetch advisory list
Apr 7 07:15:53 xs02 dashboardadivsoryd[8852]: fetch-parsers: unable to fetch data from read stream
Apr 7 10:05:41 xs02 fsm[295]: Xsan FSS 'CTiXSan[0]': [Node 58] Disk Stripe Group 0 is DOWN for this client.
Apr 7 10:05:41 xs02 fsm[295]: Xsan FSS 'CTiXSan[0]': [Node 58] Disk Stripe Group 1 is DOWN for this client.
Apr 7 10:05:41 xs02 fsm[295]: Xsan FSS 'CTiXSan[0]': [Node 58] Disk Stripe Group 2 is DOWN for this client.
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from command line: cvadmin, select <volumename>, show long
It will show you the status of the volumes and pools

I just updated my software, but seems my macbook got an error of unable to find driver for this platform..

I just updated my software, but seems my macbook got an error of unable to find driver for this platform..

Did you try more than once? If so:
Reinstall Lion, Mountain Lion, or Mavericks without erasing 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
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 then click on the Repair Permissions button. When the process is completed, then quit DU and return to the main menu.
Reinstall Mountain Lion or Mavericks
OS X Mavericks- Reinstall OS X
OS X Mountain Lion- Reinstall OS X
OS X Lion- Reinstall Mac OS X
Note: You will need an active Internet connection. I suggest using Ethernet
if possible because it is three times faster than wireless.

Need help with error on Lion Server (kernel: add_fsevent: unable to get path for vp ..)

I have had some Xsan issues and one of my volumes kept failing. I did a complete hard reboot of the entire system after trying all the cvfsck options. Now the volume seems to be ok but I am now getting the following errors and can not figure out what they are. Any help to a new Admin would be greatly appreciated.
5/7/12 1:59:13.000 PM kernel: add_fsevent: unabled to get a path for vp 0xb129000. dropping the event.
5/7/12 1:59:15.000 PM kernel: add_fsevent: unable to get path for vp 0xb12a4d0 (live.0.indexHead; ret 22; type 4)
5/7/12 1:59:15.000 PM kernel: add_fsevent: unabled to get a path for vp 0xb12a4d0. dropping the event.
5/7/12 1:59:15.000 PM kernel: add_fsevent: unable to get path for vp 0xb129de0 (live.1.indexHead; ret 22; type 4)
5/7/12 1:59:15.000 PM kernel: add_fsevent: unabled to get a path for vp 0xb129de0. dropping the event.
5/7/12 1:59:15.000 PM kernel: add_fsevent: unable to get path for vp 0xe3964d0 (live.2.indexHead; ret 22; type 4)
5/7/12 1:59:15.000 PM kernel: add_fsevent: unabled to get a path for vp 0xe3964d0. dropping the event.
5/7/12 2:01:22.024 PM mdworker32: kCGErrorFailure: Set a breakpoint @ CGErrorBreakpoint() to catch errors as they are logged.
5/7/12 2:01:22.525 PM com.apple.mdworker.pool.0: PSSniffer error: Invalid argument
5/7/12 2:01:24.697 PM mdworker: FontImporter: Validation failed - "/Volumes/Matilda/Dexter/Randy project - Burke update/James E Burke Awards video revision/Past Video files/ETH742/tricyclestudios (After FX) Jeremy/Assets/FUTURA_4.TTF".
5/7/12 2:01:24.697 PM mdworker: FontImporter: Validation Result - "(
kATSFontTestSeverityFatalError
Then I got a few more of the errors like the top lines.
Please help!!
Thanks,
Kevin Rosenthal

Turns out there were disk issues that I repaired by rebooting into Lion Recovery Mode (restart, hold Command-R during startup) and running Disk Utility. Disk Utility reported:
Volume bitmap needs minor repair for orphaned blocks
Invalid volume free block count
It fixed both problems and the drive then verified clean.
While I was there, I also repaired permissions, though I doubt that the permission oddities were the cause of the errors.
After rebooting into normal Lion, two things happend:
Time Machine quite happily went back to work and took a backup, no issue. Several hourlies have run since then, no problems.
Spotlight did some re-indexing. This caused some hangs (spinning beachballs) at first, but it self-cleared. It definitely didn't last long enough to re-index the entire drive; I'm guessing that it needed to re-index some of the repaired sections.
So far as I know, no files were corrupted -- but the drive is about 80% free space, so odds are that the orphaned blocks were not in a critical area.

Help! Installing updates an error occurred now my MacBook Pro will not restart. "Unable to find driver for this platform"

Help! Installing updates an error occurred now my MacBook Pro will not restart. "Unable to find driver for this platform"

Did you try more than once? If so:
Reinstall Lion, Mountain Lion, or Mavericks without erasing 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
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 then click on the Repair Permissions button. When the process is completed, then quit DU and return to the main menu.
Reinstall Mountain Lion or Mavericks
OS X Mavericks- Reinstall OS X
OS X Mountain Lion- Reinstall OS X
OS X Lion- Reinstall Mac OS X
Note: You will need an active Internet connection. I suggest using Ethernet
if possible because it is three times faster than wireless.

911... Unable to unmount disk! My external drive is 499G, the available space is 73G and it's empty!

Hello dear support community,
It all started when few weeks ago I plugged my external drive and nothing from the data would open. Then I got mad and never used it again. Now few days ago, when I plugged it into my Mac OS X Yosemite 10.10 it just went crazy! The full capacity is 499G. I go to "get info" and the available capacity is 73 and the external drive is empty. I have movies and videos of the capacity of 425G. Where did all that information go? I am sure I did not delete any of its content. I even copied the disk on my desktop but I can't open it either. It tell me: "you don't have the permission to see its content" And Also why when I go to "disk utility" to erase or repair the external disk, it shows me "unable to unmount disk" I would like to know what I shall do please! The Files are empty and I want to be able to recover my data and use the disk like I used to. Oh by the way, when I clicked in verify, it told me: "disk needs to be repaired" and that didn't work either.
Thank you for kindly help!
Regards!

Restart. That should free whatever it's showing as an open file.

Unable to unmount volume for repair.

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