Diskutil Error 9939

Please enter a title. You can not post a blank message. Please type your message and try again. keestux Level 1 (0 points) Q: diskutil: The partition cannot be resized but there is plenty error: -69888: couldn't unmount disk of space This is the error I get: The partition cannot be resized. Try

Disk Erase Failed With The Error Couldn't Open Device

reducing the amount of change in the size of the partition.First of all, this is really not a helpful message. volume erase failed couldn't open disk Why can't diskutil tell me how much change I need?But worse of all, there is plenty of space. Situation before the resize: * disk size: 1TB * GUID partition table * one partition using

Erase Process Has Failed El Capitan

all disk * the partition has a HFS+ volume with about 360GB occupiedNow, using Disk Utility I want reduce the partition to 500GB. It tells me that (after the resize) there will be 222GB space available. When I select Apply it starts to process. First it takes a looooong time to verify (the disk?, the partition?). And in the end it comes up with this famous error. erase process has failed press done to continue "Try reducing the amount of change in the size of the partition.". Huh? Why?Let me also say that the HFS+ volume is used for TimeMachine. But I have been careful to stop TM, I even tried after a reboot, and I even tried using Disk Utility from the installation DVD. And all the time it gives me that same error message. OK. I haven't tried to change the resize amount, because I simply don't know how much. And it is really not an option to just try, because it takes forever. Live is too short.Has anyone successfully resized a partition with a HFS+ volume on it AND used for TM? MacPro, Mac OS X (10.6.2) Posted on Apr 11, 2011 12:14 PM I have this question too Close Q: diskutil: The partition cannot be resized but there is plenty of space All replies Helpful answers by Kappy, Kappy Apr 11, 2011 12:30 PM in response to keestux Level 10 (271,467 points) Desktops Apr 11, 2011 12:30 PM in response to keestux Firstly, consider that a resize requires that the new partition requires a contiguous amount of space. The error generally means the drive is fragmented such that it cannot be r

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File System Formatter Failed

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Unable To Write To The Last Block Of The Device

Ask Question _ Ask Different is a question and answer site for power users of Apple hardware and software. Join them; it only takes partition failed couldn't unmount disk a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top Unable to format / erase hard drive up vote 11 down vote https://discussions.apple.com/thread/2812637?start=0&tstart=0 favorite 3 I have an external HD that died on me a while ago and I'm trying to see if I can format / erase it to start using it again. The disk does not show up in Finder but I can see it in Disk Utility. When I try to erase it from there I get Disk Erase failed with the error: POSIX reports: The operation couldn’t be completed. Cannot allocate memory When I try to verify http://apple.stackexchange.com/questions/125965/unable-to-format-erase-hard-drive the volume: diskutil verifyVolume /dev/disk2 Error starting filesystem verification for disk2: Unrecognized filesystem (-9958) I've tried running a surface scan in Techtools Pro, it processed 650 blocks and all were bad. I cancelled the operation cause it was very slow. Diskutil info /dev/disk2 tells me: Device Identifier: disk2 Device Node: /dev/disk2 Part Of Whole: disk2 Device / Media Name: WD Ext HDD 1021 Media Volume Name: Escaped with Unicode: Mounted: No File System: None Partition Type: None Bootable: Not bootable Media Type: Generic Protocol: USB SMART Status: Not Supported Total Size: 2.0 TB (2000396746752 Bytes) (exactly 3907024896 512-Byte-Blocks) Volume Free Space: Not Applicable Read-Only Media: No Read-Only Volume: Not applicable (no filesystem) Ejectable: Yes Whole: Yes Internal: No OS 9 Drivers: No Low Level Format: Not Supported I've also tried: diskutil eraseDisk JHFS+ Stef2TB /dev/disk2 Started erase on disk2 Unmounting disk Creating partition map Waiting for disks to reappear Formatting disk2s2 as Mac OS Extended (Journaled) with name Stef2TB Error: -9944: File system formatter failed Can I salvage this drive somehow or is it ready for the trash? hard-drive disk-utility share|improve this question edited Oct 26 '14 at 14:24 nschum 1285 asked Mar 30 '14 at 8:28 stef 2132511 Did you find the answer in the end? Im having the exact same issue.. –user88264 Aug 20 '14 at 12:37 add a comment| 5 Answers 5 active oldest votes up v

halt whatever the attempted task is right in its tracks. This can happen during partitioning, disk verification and repair, and even http://osxdaily.com/2013/06/14/resolve-a-couldnt-unmount-disk-error-in-disk-utility/ during formatting, and there's usually little to no additional information provided as http://forums.macrumors.com/threads/clarifications-of-the-hybrid-mbr.1336597/ to how to resolve the problem or even what the problem is. Typically the "Couldn't Unmount Disk" error pops up when the currently boot drive is being modified, thus the easiest solution is to boot from another drive and run Disk Utility from there instead. For the boot couldn't unmount drive, it shouldn't matter which version of OS X it's for (assuming 10.7, 10.8, and 10.9 at least), the only requirement is that it has Disk Utility - which they all do. This will allow you to fix the problem, regardless of the cause, by one of two means, the first is a sure-thing to fix the issue, while the other couldn't unmount disk only works sometimes. We'll cover both with a bit of explanation. Resolve the Unmount Error with a USB Boot Drive This is the recommended method because it should always fix the error. You will need any OS X boot drive to complete this task, I used a Mavericks boot installer drive for this purpose but others should work too, whether they are installation drives or just recovery drives, the important thing is they are bootable and separate from the primary boot disk that stores the installed OS: Attach the USB boot drive to the Mac and reboot Hold down the OPTION key during boot, then select the attached boot drive (typically has an orange icon at the boot menu) At the boot menu, choose "Disk Utility" (if using an Installer disk, pull down the "Utilities" menu to access Disk Utility) Go to "First Aid" and verify the disk, then repair if needed Now perform the original task that threw the "Couldn't Unmount" error I ran into this twice recently, first when attempting to modify partitions on a drive, w

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