Unmounting disk couldn t open device

Disk Utility Cannot erase USB Drive (Error: -69877: Couldn

  1. 1. I had a SanDisk USB stick that was giving me this issue when trying to build a bootable disk in Disk Drill. I was able to fix it by doing this: Insert the drive. Run Disk Utility. Select Partition Disk. Partition the disk as ExFAT. After this I was able to use the disk to create a bootable USB. Hopefully this will fix the issue for you as.
  2. Normally, any 'Couldn't Unmount Disk' error is attributed to circumstances where the boot drive is being modified or is being used by an application or process. So the first thing to do is to startup the Mac from another bootable drive such as an external drive or OS X Recovery. You can then run Disk Utility from there
  3. If the internal drive is causing the issue because the OS X Recovery exists as a partition on the physical disk, unable to modify or unmount the internal drive, then the preference must be given to a network drive or an external drive
  4. Step 2: Type Disk Utility in the search field. Step 3: Double-click on the Disk Utility icon. Step 4: In the Disk-Utility app, select the disk that you want to unmount in the sidebar. Step 5: Click the unmount button in the toolbar or beside the disk set name. After following these steps, you can erase the Mac hard drive volume

Disk Utility Tip: Fix 'Couldn't Unmount Disk' Error

  1. If Couldn't Unmount Disk error occurs when you are trying to modify the boot drive, the easiest solution is to boot your Mac using another drive, and then run Disk Utility from that disk
  2. Started partitioning on disk2 Unmounting disk Error: -69877: Couldn't open device Running gpt show -l /dev/disk2 yields. start size index contents 0 7741440 Running gpt destroy /dev/disk2 yields. gpt destroy: unable to open device '/dev/disk2': Permission denied It seems to me there is some lock on device disk2
  3. Typically the Couldn't Unmount Disk error pops up when the currently boot drive is being modified, or if a disk was trying to be erased you may find the erase failed with a couldn't unmount disk error
  4. $ diskutil unmountDisk diskX ← Only if necessary (you get a Resource Busy) $ sudo dd if=/dev/zero of=/dev/diskX bs=1m If none of the above works, it's likely the device has failed. On SD cards, this is actually quite common
  5. al. Launch up Ter
  6. This is the output in Disk Utility: Disk Utility cannot modify this disk because it contains CoreStorage physical volumes. Use command line distil instead. The selected partition won't be changed

External Hard Drive, Usb drive, Flash drive, Yosemite OS X , El Capitan OS X, Macbook pro, iMac, macbook air, macbook, macbook retina display, macbook retina.. macOS Disk Utility. Trying to format the device with macOS Disk Utility throws these error: When erasing partition: Starting secure erase Unmounting disk. Creating the partition map. Couldn't open device. Operation failed When erasing filesystem: Unmounting disk. Couldn't modify partition map. Operation failed Wipefs tool. Wipefs.

3 ways to fix 'Couldn't Unmount Disk Error on Ma

Couldn't Unmount Disk/Volume for Repair Error on Mac? 4

'Unmounting disk. Couldn't open device.Operation failed.' I see the same thing. So he had to figure out how to unmount the partition first. And he did. And that's what I need to know to get the erase process going Then I erase the disk and format it to FAT32 $ diskutil eraseDisk FAT32 NEW_NAME /dev/disk2 Started erase on disk2 Unmounting disk Creating the partition map Error: -69877: Couldn't open device How can I erase the disk and format it to FAT32 without using third-party applications 1. To begin with, you have to access the Terminal application. 2. Then, input the diskutil list line, which will list out all the disks on the Mac. 3. At this time, you ought to find out the disk that you want to force unmount. 4. Lastly, you should type sudo diskutil unmountDisk force /dev/disk line

Mac Getting the Couldn't Unmount Disk Error and How to

Unmounting disk. Erasing. Couldn't open device. : (-69877) Operation failed... 2020-1-17. Quote 15 Floor Hi just wanted to say thank you. I had the exact same problem and couldn't find any answers. Thank you to Mark and the Guest with the detailed instructions I've got my build plate back! Mark 2020-5-6 I show in this video the solution to the disk disassembly problem in macOS.Solution Disk Erase Failed with error Couldn't unmount disk mac error 69888PTBR -.

You can try to repair it with Disk Utility's First Aid in Recovery Mode. 1. Boot your Mac into Recovery Mode. Start your Mac and hold down the Command and R keys simultaneously until you see an Apple logo or spinning globe. Then release the keys. 2. Select Disk Utility from the macOS Utilities menu and click Continue. 3 Method 3of 3:On GNU/Linux Download Article. Open a terminal and type 'df -h' to list all drives. Locate your drive, remember the path that it is Mounted on. Unmount the drive by typing the command 'sudo umount' followed directory that it is mounted on. You must have superuser privileges to do this

I was getting things like: could not modify partition map and couldn't unmount disk. Other things could be things like couldn't open device. Erasing an External USB or Hard Drive that keeps failing in Disk Utility. Thankfully I ended up fixing it quickly (with a little googleing). Here's what you do Open Disk Utility and select View > Show All Devices from the menu bar. You should see the device names for each of your drives appear in the sidebar. Alternatively, use the shortcut Cmd + 2. Select the parent folder for the drive you want to reformat or erase, then click the Erase button again

How to fix Error: -69877: Couldn't open device after

  1. ute
  2. Step 2: Select a Disk or Device to format. Now, you can view a list of all the available disks and the connected devices on the sidebar of the Disk Utility application. If you want, you can go to the dropdown menu from the top-left corner to view all volumes and devices. From here, you can just select a disk, volume, or even an external device.
  3. This allows programs to access devices without the need for the user to initiate each action manually and allows you to use more convenient tools (for example, file managers or Disk Utility). The boot disk on your device will always be numbered first, so the corresponding file will be named disk0, and the full path to it will look like.

I show in this video the solution to the disk disassembly problem in macOS.Solution Disk Erase Failed with error Couldn't unmount disk mac error 69888PTBR -. Unmounting disk Creating the partition map Couldn't open device. Operation failed :ººº(1. Share. Report Save. Continue this thread.

The USB could be mounted on any VM and it was detected and set as a USB drive, once it was mounted on one VM you couldn't mount it on another unless it was removed. My only other thought is to test the remote mount plugin on OMV, install it, set it up, what happens if you unplug the drive, does the drive get detected when it's plugged in again. Distribution: Slackware (current), FreeBSD, Win10, It varies. Posts: 9,952. Rep: if the other reasons do not seem to fit then it might be -> if you mounted it in a filemanager / automount for whatever reasons. go terminal-> sudo unmount -l /dev/sda1 give that a try, or reboot and try not to open a filemanager Select the drive used for the ISO file and click or tap the Manage tab on the ribbon. Then, click or tap Eject. You can also unmount the ISO file by right-clicking or pressing-and-holding the drive of your ISO file, and then clicking or tapping Eject in the contextual menu. Answer: Mounting a hard disk makes it accessible by the computer

Unmounting disk Error: -69877: Couldn't open device 3. Physical toggle on the drive to toggle read-only on and off. Unfortunately, I couldn't find any physical toggle. I took a thorough look at my stick but there was nothing... Do you guys maybe have any additional/other advise? Or could it be possible that this USB is gone forever : Unmounting disk Creating the partition map Error: -69877: Couldn't open device (Is a disk in use by a storage system such as AppleRAID, CoreStorage, or APFS?) h-pro:~ h-pro$ Comment harlansmart macrumors newbie. Original poster. Nov 23, 2016 28 1 Nouvelle Zélande. Oct 28, 2019 # From the top right menu, select Format Disk option. You'll get the usual warning about losing your data on the USB disk. Click on Format: At this point, you should also create a partition of the entire free space size here. I have used another USB disk in the below screenshots. Format it to FAT file system

Let us try to unmount the datastore from the ESXi host again. Go to Manage -> Storage -> Storage Device. Find the corresponding LUN in the list, select it, and click Detaches the selected device from the host. Delete partition table of VMFS datastore. At times, the unmount operation still fails even after changing the paths to the log directory 2. Click the Disk Utility item to open the disk manager. 3. Click the Show all disks menu to list all hidden disks. 4. Select the disk that you want to create the partition. 5. Format the disk with Mac OS Extended (Journaled) format on the right side erase tab. 6. Give the partition a name and click the erase button to format it. 7 The lsof (list open files) command displays a list of all open files and the processes associated with them on a specific file system, directory, or device. By default, it lists all files, shared libraries, and directories that are currently open and provides as much information as possible about each of them Unmounting disk Error: -69877: Couldn't open device I have a Verbatim 8GB drive that stopped working and have been trying to format it on Mac and windows with both telling me I don't have permission to write I don't care much about the Data in the drive so all I wan to do is to force format it [ | #

Open files aren't the only unmount blocker. See here and here for other causes and their remedies. Even if you've got some lurking gremlin which is preventing you from fully unmounting the device, you have at least got your filesystem in a consistent state I have a 4GB usb storage drive that I cannot save files to. I have copied the information I want from it, so now I would like to rescue is as a freshly formatted drive, if that is possible. There is no read-only lock switch on this device. This is what happens But when I try eraseDisk it says: Error: -69877: Couldn't open device $ diskutil eraseDisk Fat32 MYDISK disk2 Started erase on disk2 Unmounting disk Error: -69877: Couldn't open device Trying to write another iso fails also. Anyone could get over this Unmounting the ISO Image. To unmount a mounted file system, A floppy drive (with a floppy disk in it) is a storage device. That means an sd (for storage device) device file will be used to connect to the physical device. We must establish which is the next free sd device file. Dave is a Linux evangelist and open source advocate Open files. Processes with open files are the usual culprits. Display them: lsof +f -- <mountpoint or device> There is an advantage to using /dev/<device> rather than /mountpoint: a mountpoint will disappear after an umount -l, or it may be hidden by an overlaid mount. fuser can also be used, but to my mind lsof has a more useful output

Resolve a Couldn't Unmount Disk Error in Disk Utility

Some Mac users may require the ability to erase a disk or erase a hard drive from the command line on Mac OS, a task which is typically performed through the Disk Utility application from the GUI. The command line approach to disk erasure in macOS is a bit different and it requires precise syntax to insure that you are erasing the proper disk, making this method of erasing any disk only. Tried to format in Disk Utility by erasing - Mac OS Extended (Journaled) & GUID Partition Map. I get the message Erase process has failed. Details say Unmounting disk, couldn't unmount disk, operation failed. What did I do wrong? Any help is greatly appreciated. SIerra 10.12.6 iMac Late 2015 2 Disk label type: dos Disk identifier: 0x000ce563 Device Boot Start End Blocks Id System /dev/sda1 * 2048 1026047 512000 83 Linux /dev/sda2 1026048 156248063 77611008 8e Linux LVM Disk /dev/sdb: 80.0 GB, 80000000000 bytes, 156250000 sectors Units = sectors of 1 * 512 = 512 byte

I accidentally reformatted my 5TB HFS+ case-insensitive encrypted drive to FAT using quick format using the macOS Disk Utility GUI. It results in a failure leaving the drive unable to mount. A quick check in diskutil shows the partitions are still intact, yet macOS does not automatically detect the volumes You can mount and unmount drives, volumes, and disks from the command line of MacOS and Mac OS X. For many users, the easiest way to unmount a drive in Mac is to either just drag a volume into the Trash, use the eject keys, disconnect the drive, or use one of the force eject methods. Along the same lines, if you want to remount a drive you can. how to fix disk on a mac. ttrbrtsn asked on 1/13/2020. Apple OS Apple Software Mac OS X Apple Hardware Installation. 7 Comments 1 Solution 113 Views Last Modified: 6/1/2020. how can i fix disk on mac 2015 ? ive tried the diskutil command but not sure if im doing it correctly. i want to delete everything and create one partition so i can install. Solve/Fix Erase Process has Failed While Erasing Partition for macOS on Disk Utility. Note: The first method below, is found by me and it may work on any other PC, though it was a Lenovo Z50-70 Laptop, I am somehow sure that it will work for you as well. If it didn't, then please let me know by the comments section, also don't forget to check the second method as well

macos - Disk Utility cannot erase USB drive (error -69877

  1. I open up Disk Utility; navigate to the drive and try to run first aid hoping to get it up and running in no time. Started erase on disk3 Unmounting disk Error: -69888: Couldn't unmount disk which lead me here. Is my drive halve DOA or is there some simple fix? By clicking Accept all cookies, you agree Stack Exchange can store.
  2. It happens when udev isn't running (so all device units are dead, and since mounts are bound to devices, systemd will immediately unmount it in the device's absence). As you note correctly, the unmounting is instant. I am not sure about the first one, and without any logs it is hard to guess
  3. If mounted, there will be an option of unmounting. Click on it to mount your SD card. Method 3. Perform a First Aid check on your SD card. The First Aid check on Disk Utility is complete when you suspect something could be wrong with your SD card or any other external disk plugged in on your Mac. Step 1. Go to Disk Utility. Step 2
  4. The device_name can be estabilished by consulting the df command. I wonder if there is any drawback in using 'hdiutil' in this way. [ Editor's note: Please note that there is a hint about Ejecting a busy disk image with a different method of solving the problem - namely, identifying the processes that are preventing the ejection in the first place
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It mounts the drive, if it is present already in fstab (mount command without mount point succeeds), else it creates a new mount point based on the device name (I couldn't find a way to get UUID from within udev rules easily), mounts the drive with default options to that mount point and then runs dietpi-drive_manager to have the fstab entry. Hi all, Have a corrupted old MYPassport for Mac, which was transferred to a new replacement WD passport (under warranty) by WD contractorwish to erase and dispose. I get into Disk Utility, I find the drive and try to erase: I get erase failed. Notice that on the drive details chart says: -Not Mounted -Available 999.83 Available: 0KB -Users: - -Owners: Disabled Please advise: is it.

Fix for disk erase failed couldn't unmount disk - St

ISO is the most popular file format for disc images. When you open a disc image, you see its contents, as if it were the disc that it is cloning. You can use the disc image the same way. To unmount a mounted file system, use the umount command. Note that there is no n between the u and the m—the command is umount and not unmount 0. Jul 25, 2014. #1. Hi. I am currently trying to install Yosemite and I wanted to partition my Macintosh HD but I get the error: Partition failed with error: Couldn't modify partition map because file system verification failed. I have a 512 GB disk with 120 GB dedicated to Bootcamp and the rest is Macintosh HD at the moment

Deleting a partition in Disk Utility fails

Feb 5 13:37:15 xxxxxxxx umount: (In some cases useful info about processes that use Feb 5 13:37:15 xxxxxxxx umount: the device is found by lsof(8) or fuser(1)) Feb 5 13:37:15 xxxxxxxx systemd: var.mount mount process exited, code=exited status=32 Feb 5 13:37:15 xxxxxxxx systemd: Failed unmounting /var. Feb 5 13:37:15 xxxxxxxx systemd: Unit var. Hi, Mounted a dvd iso with the mds and unmounted it with the eject feature on the tray. Dt drive unmounted ok, but I couldn't move the iso because it was locked by System. Unlocker couldn't detect any lock on the file, but I had to reboot to release it, killing and restarting explorer, logging off/on didn't help. Anything to do with dt? I'm using Win7 sp1 x64+dt lite To check these, open the Disk Utility program and then hold the Command key and click the device name as well as any indented volume names listed under it to select them all at once. Then use the Verify Disk option in the First Aid tab to check the drive for errors. If any errors are found, attempt to repair them

Linux. The command for that is something roughly like: ifconfig eth0:fakenfs netmask Where is the IP of the NFS server that went away. You should then be able to ping the address, and you should also be able to unmount the filesystem (use unmount -f) I tried checking Disk Utility before unmounting, just to check I could find the application, and there was My Book and another external hard drive called 'Maxtor Basics Desktop Media' (the other HD is a Maxtor brand), but the option to Verify was greyed out (as well as Repair and Clear History), then I got a new pop up message 'The disk you.

It the drive is cold and you don't feel the disk spinning, (even after swapping power ports), it's the drive. If you hear some unusual noises coming from the drive (such as a click), the drive is dead. If you haven't already, unmounting it from its spot in the case will make all this much easier to check Once you're done, follow the step below. Step #1. Click on the small down arrow at the top-left corner of the Disk Utility window and select Show All Devices. Show All Drives. Step #2. Select the main hard drive, not the volume then click on the Erase tab. A small window will appear now Frage: F: Festplatte löschen: Fehlermeldung Unmounting disk couldn't open device Hallo, wer kann mir helfen. Beim Löschen bekomme ich diese Meldung siehe Betreff. Mehr Weniger. MacBook Pro 13, macOS 10.14 Gepostet am 18. März. 2019 21:07 Antworten Ich habe die gleiche Frage (7. The whole point of external USB-connected storage is that you can easily unplug it, but Windows's Eject Mass Storage option balks sometimes. Resist the urge to yank out the drive and try one of.

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Method 1. Check the HDD connection. Sometimes, the cable can simply stop working, which is why the hard drive keeps disappearing on Windows 10. It is also worth trying to disconnect the hard drive and connect it to another computer with another cable. If this helps, then change the cable, as it is probably already worn out or damaged mechanically When you get the error, Alt + F2 to a second console. Find out which device your USB stick is ( tail -n 100 /var/log/syslog) If the device is busy, umount it (umount /dev/sd [abcdef]1) Then mount it to /cdrom ( mount -t vfat /dev/sd [abcdef]1 /cdrom) Alt + F1 to get back to the install console, and try detecting again. Share [ 3.512219] arch systemd-tmpfiles[198]: Couldn't adjust quota for subvolume /home (unsupported fs or dir not a subvolume): Inappropriate ioctl for device [ 3.513933] arch systemd-tmpfiles[198]: /home has right mode 40755 [ 3.514399] arch systemd-tmpfiles[198]: Running remove action for entry Q /home [ 9.541282] arch systemd[307]: home.mount. RE: Unable to umount (all processes killed) SPguru (MIS) Tried modifying some and got the message files are open!?So what on this and other technical topics. All information killed) aix4me2 (TechnicalUser) (OP) 8 Aug 03 16:28 -f is for remote mounts only. to IBM. Has the vendor of the app ever suggested to yo

Disk Erase Failed with the error: Couldn't unmount disk

usb drive - Unable to open device '/dev/sdb' for writing

If the hardware seems to be OK, let's check the software that related to this disk problem. The My passport disk driver, a software component, bridges the operating system and the drive to communicate with each other. But the files of My passport driver could be deleted, outdated, or corrupted for virus invasion or misoperation To make space for a new partition for Kubuntu, I shrunk the end of sda2 by 30Gb, but couldn't format this unallocated space as there were 4 primary partitions already. So I decided to delete sda1 , move it's unallocated space to the right of sda2 and add that space into sda2 External Disk Selected. However, it's highly unlikely that pointer #2 will help you get your WD My Passport mounted on Mac if the disk has some cryptic issues. Otherwise, on a healthier external drive, this option works flawlessly. 3. Go to Disk Utility and identify if your WD My Passport is listed on the left-hand side of the interface. But here is a twist, an unmounted drive be it a WD My. When I open Disk Utility it says Used: 4.03 MB, Purgable: 0 KB, Free 4.7 MB. I click on Erase and it says Done in 2 seconds. The Icon for the disk disappears off my desktop. I remove the disk and get no comments from the operating system. When I plug the disk back into the camera I still the same message MEMORY FULL Access is denied because the NTFS journal file is unclean. Choices are: A) Shutdown Windows properly. B) Click the 'Safely Remove Hardware' icon in the Windows taskbar notification area before disconnecting the device. C) Use 'Eject' from Windows Explorer to safely remove the device

Disconnect any external storage devices from your Mac. Choose Apple menu > About This Mac, then click Storage. If you see a drive labeled Fusion Drive, your Fusion Drive is working and this article doesn't apply to you. If you have a Fusion Drive that has been split, you should see two drives If you are running macOS 10.13 (High Sierra) or later it is important to change the view in Disk Utility. Change the view to Show All Devices instead of the default which is Show Only Volumes. If you are running 10.12 or 10.11 this step is not required as the option is not available. You should see at least two, sometimes three, entries for. Open the Command Prompt in Administrator mode. At the Command Prompt, type diskpart and press Enter to access the command-line disk partitioning utility. Before mounting or unmounting virtual disk, you need to specify the location of your vhd/vhdx file. Type the following command and hit Enter. select vdisk file=[location of vhd

MacOS - Disk Utility cannot erase USB drive (error -69877

Since this docker containers sets up a VM automatically, it might cause you some issues. For instance, the VM could choose a wrong network bridge - it did in my scenario. And for some reason, changing the GUI settings for the VM broke the VM. The icon for my VM was changed and I was facing the black screen issue Your Applestore dude is wrong, catalina has a memory-management issue. I can not open a document in MS Word which I could open before, it tells me, it exeeds the memory. A friend's macbook pro froze working on a CAD file and froze after any restart, my Macbook pro froze as well when I moved 2GB of Photos to the trash An ISO image or .iso (International Organization for Standardization) file is an archive file that contains a disk image called ISO 9660 file system format. Every ISO file have .ISO extension has defined format name taken from the ISO 9660 file system and specially used with CD/DVD Rom's. In simple words an iso file is a disk image Open Disk Utility (as per the steps above). If you don't require the data on the hard drive, select the disk and click Erase. Before Disk Utility starts to erase the disk it will pick a format.

.NET API and creating/unmounting a RAM Disk - posted in ImDisk: Hello, I came across ImDisk there other day and wanted to use it create a RAM Disk using 15 GB of memory, but I am having a hard time trying to recreate the following command line in C# (or VB, if you dont know C#). imdisk -a -s 15000M -m R: -p /fs:ntfs /q /y I have found a sample that used the following code, but I am not sure. # Check disk `IDENTIFIER` $ diskutil list # Unmount micro SD card disk $ diskutil unmountDisk disk2 $ sudo newfs_msdos -F 32-c 8 disk2s1 512 bytes per physical sector newfs_msdos: 65404 clusters too few clusters for FAT32, need 65525 $ sudo newfs_msdos -F 32-S 4096-s 1 /dev/disk2 newfs_msdos: warning: /dev/disk2 is not a character device 512. > Setup iSCSI on CentOS7. Mounted a iSCSI disk and am running a small > MySQL instance on the disk. The iSCSI disk and MySQL instance all come > online fine with booting but when shutting down things seem to get very > upset and the drive does not get unmounted cleanly. > > Does not look like I'm the only one having the issue. Another repor Hi, but i have already a partitions [[email protected] ~]# fdisk -lPlatte /dev/sda: 53.6 GByte, 53687091200 Byte 255 heads, 63 sectors/track, 6527 cylinders Einheiten = Zylinder von 16065 × 512 = 8225280 Byte

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Disk erase failed couldn't unmount disk - YouTub

I'm not sure if this is an issue with the new enclosure I bought for this drive or the drive itself. Both are brand new. The enclosure is from Simplecom. I've also tried putting the RED drive into a PC tower with a spare SATA slot and still not recognised in Disk Management software (via Control Panel app). Using USB on macOS I've tried using Disk Utility and Disk Warrior and neither see. Create an instance recovery alarm. For more information, see Create alarms that stop, terminate, reboot, or recover an instance.. If you changed the instance type to an instance built on the Nitro System, status checks fail if you migrated from an instance that does not have the required ENA and NVMe drivers In this article, I'm going to show you the complete guide to fix VirtualBox errors while installing Mac OS X. Most of the website that creating content regarding the installation of Mac OS X El Capitan or macOS Sierra on VirtualBox is not complete and have errors. The article might be correct and work on one device perfectly and without any problem --type/-t disk. Specifies that the device is a disk pool.--attach/-a aspec. Configures an attachment, which is the physical or logical connection of a storage device to a host. For a disk pool, the attachment specifies the host name and the file-system directory that stores the backups

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