Solution Disk Erase Failed with error Couldn't unmount disk mac
ฝัง
- เผยแพร่เมื่อ 18 พ.ค. 2016
- Technicalconfessions.com
This video show an alternative way to reformat and erase your SD drive when you receive the following error within the disk utility GUI
Solution: Disk Erase Failed with error: Couldn't unmount disk mac
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Fantastic video, short and to the point. Never used Terminal before, but you helped me be able to erase a locked disk that Disk Utility couldn't do. Thanks again!
Unmounting disk
Error -69877: couldn't open device
Can you help keep?
I tried Almost 10 videos and tricks to find the solution and None of them works.
Just only your tricks works..
Thank you for sharing the ultimate solution.
Thank you so much. I was able to get my drive back up and running. This was really helpful!
Yesssssss thank you! After I entered the command prompt to erase my disk I received the error saying the name was not correct. Solution was to use the exact case sensitive existing name of my drive, then it worked. Thank you!
Hi Daniel.
Although your video didn't help me solve my problem but I wanna thank you for your effort. Kept getting "Error 698877: Couldn't open device" even after following your video step by step and your advice given at the comment section. Even then I am glad I learnt something new using the mac's Terminal and it was interesting; just like the old days using DOS.
Spent two days trying to format my used 64 GB Sandisk microSD card in order to use them for my dash-cam recorder and finally I managed to have it resolved. I needed to format it to FAT32 as required by my new dash-cam. My Mac Disk utility kept failing to format it and gave an error msg "Couldn't modify partition map". I inserted my micro SD card into an adaptor and mounted it via the SD card slot and I guess that could be the problem. It got resolved when I used a USB 3.0 card reader instead and connected the USB cable on my Mac (macOS Sierra 10.12.16). Initial test using a used 16gb microSD worked with only one try. However with the 64gb microSD it ran with some errors but after 2-3 tries including repairing using the utility "First Aid" and Presto!!!!... was successful.
Don't ask my why or how it worked. But it did and I am satisfied.
Rgds,
Amir from Singapore 😊
This worked for me, thank you so much! I have an expensive Samsung 850 EVO SSD, so i got scared that it wasnt going to work, total life saver!
Rogue Ninja great to hear! ♥
Amazing, thank you very much Daniel your video help me out fixing my issue:
"disk utility couldn't modify partition map"
Thank you very much, man !!! You really helped me !!
I already watched alot of videos and I fount the solution just here !
Bless You !
Thank you!!! This worked beautifully!
Great vid! Totally worked for reformating my 1TB seagate ssd! Thanks!
Awesome news!
Much Love BRO!! ..Thanks ..It worked like magic !!!!
what if it said that error 69877 : couldnt open device??
what should i do??
please help me
najihah fauzi I got that error too
This is guy is 100 % accurate with this! The people at apple couldn't even help me, smh. Thanks Daniel!!
You are a blessing! It worked for me. Thank you so much :D
Thank bro, it's very useful with me!😍
THIS WORKED!! Thanks so very much!
This video is evergreen. Thank you so much for saving me another several hours 🙂
THANK you so much. Exactly what i needed and help me fix the issue. New Sub my friend
thank you so much!! God bless you for doing this !!
Thank you so much! Saved me a disk!
Thank you! This saved my life! :D
thanks!!!! in august 2019 Tahnks!!!
it is wonderful tutorial it works for me perfectly
thankyou more
THANKS SO MUCH GOES PERFECTLY
Perfect! Thank you
it worked for me thanks !
Thank you! this video is so useful :)
Thanks for this, able to solve my problem
Firz Mawali you're welcome!
dude I fucking love you. Fucked up my external hdd when tryna format it and have been searching for like 6 hours on how to repair it and this worked.
And I love you too. Good to know it worked for you
Thanks its works dude,, nice
really worked! thank you so much
Thank You So Much
thank you! it worked!
Thanks a lot ! LiveSaver :)
Thank you so much sir!
:-)
Great man, thanks a lot
you are a fucking genius....I have been searching HOURSSSS for this video......Thank you so sooooo muchhhhhhh
OMG VERY THANKS FOR SHARING
"Error Couldn't Unmount Disk"
how can I choose a partition within a selected drive? I need to do this to a specific partition not the entire HDD. however, thank you soooo much!
thanks a lot
THANK YOU SO MUCCHHHHH!!!!!!
Error: -69760: Unable to write to the last block of the device
Getting this error... what i do
I second this.
Had the same error. I ejected the sd card and reinsert it. Then I redid the process and it worked for me
same here
Im trying to format 2TB my passport studio. i suspect it is because of the wd unlocker not showing in diskutil list.
Thanks a lot it worked
I did this and it is keep telling me couldn't unmount the disk in the terminal ... could you please help im stuck in this problem 2 weeks tell now
It appears Unable to write to the last block of the device, what should i do?
thank you sir
Hesham Al gunaid, no thank you!
It says "The target disk is too small for this operation (-69771)" It is a lexar 64 gb flash drive. I was trying to make it boot into windows, but now I cant delete anything. PLZ HELP! Thanks!
My hard-drive is absolutely cooked now. It wont let me use it or touch it or edit it. When I go into disk utility it won't let me click on anyhthing. PLease help me.
It went through the operation, saying it unmounted the disk and erased it--but then the operation failed, saying "This operation requires an unmounted disk." What should I do?
Error: -69877: Couldn't open device
what to do? Please help
i got an error eraseDisk command
unable to write to the last block of the device
2:07: "..do a disk util on a raised disk.." ????
Although I'm able to zoom in.. I can't see what you're typing in the command line. Moreover, the transcript is no help.
PS
Some feedback about the demo: Any time I'm able inputting information into the command line, for example:
disk description, or
disk names.... or other such command prompts, it very helpful and eliminates typo's if your demonstration shows that you can 'cut and paste' these descriptions . Hope that makes sens?
thanks for your response in advance.
Perhaps changing the resolution to HD will help
Anyhow.. here's the command
diskutil eraseDisk FAT32 NONAME MBRFormat /dev/disk1
thanks for the fast reply.. good news, I'm currently backing up my Mac onto my external HD (250GB) and all it took was like maybe 12 tries.. and all I did was continue to push "Erase" in the disk utility program. Dumb luck and a bit of tenacity.
PS
liked, and subscribed.
Thanks again.
Unmounting disk
Error: -69877: Couldn't open device
Unable to write to the last block of the device
it says Error:12 POSIX reports: Cannot Allocate memory
Unable to begin erase operation: The disk is too large to be supported by the given partition scheme (-69659)
how to delete disk 0? still couldn't unmount how?
I got an error: 69877: couldn't open device
Unmounting disk
Error: -69888: Couldn't unmount disk
PLEASE HELP ME
Same here
Same here!
use this way
Same here...
You have to disconnect the USB HDD then insert it back in. Once you've done that, the processes using that USB HDD will be killed. You then run the commands within your terminal
Could not unmount... Error: -69888: Couldn't unmount disk...
that helped thanks
hi i tried doing this on my 32 gb hard disk now i can see only 30 gb could you suggest
Annira Avinash, do a 'df - h' within a terminal window to confirm all space is available
i'm not very sure hw that'z done where do i input that command i just followed your video and did exactly
hi Daniel i dnt hve idea how its done could u drop m a detail screen shot hw its done to ma mail id annira.avin@gmail.com
Hi Annira, The command will show you the available space. technicalconfessions.com/temp/forAnnira.png
You will be able to see %used. If there's 0% used then it's absolutely empty. Sometimes there's some block on the hard drive that not writable any therefore you might have some space taken up already.
Error - 69877 couldn't open device please help
Unknown Partition Scheme:x help please
I followed this step for step and i still keep getting Error -69877: couldn't open device
it blocked me here:
[ | 0%..10%..20%..30%..40%..50%.......................... ] 50.0%
and after few minutes gave this error:
Error: -69760: Unable to write to the last block of the device.
Amazing ! Save my Life for today !! hahahaha Thx !!!!! ;)
Ivan Rodrigues, Yay, lifesaver!
Error 69825 wiping volume data to prevent future accidental probing failed.....🤬
-69863 insufficient privileges. I forgot the admin password.
I got this too: diskutil eraseDisk FAT32 NONAME MBRFormat /dev/disk2
Started erase on disk2
Unmounting disk
Creating the partition map
Error: -69877: Couldn't open device
Is the USB device destroyed or something like that? It appears after 1 min. I can see it in Terminal if i write: diskutil info disk2
Device Identifier: disk2
Device Node: /dev/disk2
Whole: Yes
Part of Whole: disk2
Device / Media Name: Ultra Fit
Volume Name: Not applicable (no file system)
Mounted: Not applicable (no file system)
File System: None
Content (IOContent): FDisk_partition_scheme
OS Can Be Installed: No
Media Type: Generic
Protocol: USB
SMART Status: Not Supported
Disk Size: 61.5 GB (61505273856 Bytes) (exactly 120127488 512-Byte-Units)
Device Block Size: 512 Bytes
Read-Only Media: No
Read-Only Volume: Not applicable (no file system)
Device Location: External
Removable Media: Removable
Media Removal: Software-Activated
Solid State: Info not available
Virtual: No
Unmounting disk
Error: -69888: Couldn't unmount disk
Error: -69888: Couldn't unmount disk
I love u
sau khi cài win nó ra thêm 3 phân vùng. xoá 2 phân vùng đi. để lại fat 32. kéo dãn fat 32 ra . reset vào cài mác fomat như bình thường
Still couldnt unmoount disk! (
damn! Sorry this didn't help
Didnt work
2Much alright!!
???
Thanks alot
Error - 69877 couldn't open device please help
Error: -69888: Couldn't unmount disk