The GUI based "Disk Utility" wasn't letting me break down the multiple partitions and reform my external USB drive... but your command line method worked like a charm. Thanks for making it simple and being so concise. Your soft voice was a pleasure to hear and I followed alongside knowing that you wouldn't lead me astray. Kudos and much thanks to you, my friend.
How do you only have 277 likes??!!!! Other videos have terrible explaining and they didn't even fix the problem and you? You are amazing and I can't believe it actually worked you are a lifesaver
Brilliant! I was having issues with disk utility formatting large volume disks to only 1.6TB. I was losing my mind and all the forums just point to the driver being the issue. This totally sorted it out. You've earnt a new sub and a big like!
Hey man I would appreciate it so much if you could do a short follow up video explaining how to expand your windows partition in boot camp! There’s no real recent tutorials on how to do it and I think a lot of people would find it helpful/useful.🙏🏾💯 great channel btw!
Thank you, thank you, thank you my friend. This was spot on. I had just briefly forgotten about the file formats but this quickly jarred my memory. With the changing of the guard from HFS to APFS, bumping the external up to APFS (format-wise) was the call now that most current systems are running 10.14 or higher. Brilliant video, I will be checking back from time to time. Cheers!
Hi thank you for this video I followed it to the letter and the message I get is Started erase on disk2 Unmounting disk Error: -69877: Couldn't open device Any idea what I can do?
I had the same problem and followed the steps, although in the end I had to erase the disk from the terminal. It has been a whole day and it is still in the erasing process. Will it take longer? Or is there a possibility that it has frozen?
I am switching my 2012 macbook pro to an SSD from HDD but disk Utility is throwing a osStatus error 49157. I have searched and removed time machine snapshots, but same result. Super Duper and Carbon Copy Cloner are non-effective. (Tried, both failed.) Any suggestions or (preferably) solutions? Great video with precise details about formatting. Thank you!
I am trying to reinstall after deleting it previously for a new owner for my laptop. Now I want to install the OS. It keeps on giving me error saying "an error occurred when preparing the installation". Changed the date and time still nothing. So I am trying to start from the beginning by erasing everything again. APFS is greyed out. When I choose Mac OS extended journaled, it gives me an error.
I have an internal hitachi hd that appears to be fine when verifying the disk and repairing it. Expect I"m not able to repair disk or verify the permissions for it. Is there a way to fix this problem let alone mount the disk by chance?
I used “diskutil eraseDisk jhfs+ Internal /dev/disk17” it started to erase, in mount, create partition map, waiting for partition map to activate, formatting disk17s1 as Mac OS extended (journaled) with name Internal. BUT THEN IT SAYS “Error: -69850: The chosen size is not valid for the chosen file system. Idk what this means. Help?
I do so like your videos for erasing etc Mac drives. Can you help erasing and formatting etc a Seagate 2TB disk originally meant for an Acronis True Image. I've tried all sorts but it always fails with, presumably, an error message -69877. Thanks
great video. i have an HD that is now not working well with Carbon Copy Cloner, to make a sparse bundle clone. i can restore a volume on this HD from an existing clone but i cannot create a new clone from it without an error. it has a few bad blocks. the data is backed up. would reformatting the drive using Secure Erase (vs Quick Erase, as shown here) allow me to get around this issue or are Bad Blocks already handled by the drive's Firmware and there's really nothing i can do about this? thank you.
How do I format the disk including the boot partition? When I do your command it says I can't format the boot disk. (I'm trying to format whilst in the recovery screen.
If you've booted into the recovery partition from the local disk, then it may not let you format the drive because you're booted from a section of it. Try these two optional key combinations to boot and they should help. Note, they boot over the Internet, so your boot will take a loooong time, so you'll have to wait for it. Option-Command-R Shift-Option-Command-R
Terminal is giving me this message: Joemar:~ jose$ diskutil eraseDisk APFS External /dev/disk2 Started erase on disk2 Unmounting disk Creating the partition map Error: -69877: Couldn't open device Joemar:~ jose$ Any advise on how to fix this? Thanks in advance.
I'm trying to erase my internal hard drive using diskutil eraseDisk JHFS+ hardrivename diskN to do a fresh install but upon reaching 50% im getting error -69760: Unable to write to the last block of the device. Im also getting the same prompt on disk utility. Does it mean that my hard drive or possibly hard drive cable is toast? Thanks for any help.
Hello, I have been trying a lot of your videos to try reset an external drive... I followed this video all the way to the erase disk command but got the error message "error: -69877: Couldn't open Device: I know you're not a tech help guy for random people on the internet like me, but I would really appreciate any help. The disk shows up with the diskutil command, but it seems to not let me do anything to it. thanks for any help.
It’s not really an issue. It should work fine for most Mac functions. It’s just if it’s a Time Machine dusk or a startup disk that it would need to be a Mac specific format.
Nice video mate! A question. Im using a raid 5 configaration on an external drive. Although I can see it and use normal the software and the hardware raid , my mac wont format it. I formated on a pc and now my mac wont mount it. Any sugestions?
The disk won't mount, which is why I couldn't use Disk Utility. I tried your method, but without a mounted disk, it can't erase. I tried anyway with /dev/disk2 but of course it gave me the error "Could not find disk for /dev/disk2", HOW CAN I FORMAT A DISK THAT WILL NOT MOUNT?!!!
@@gmlaster thank you for the quick response and I am truly sorry for your lost data. I guess I have the same fate my jnternal hard drive is in this unmounted state and I too have lost all my school work and research papers. I don't know if you have kept your external hard drive or not but if I find some videos which may help I can share the links with you and maybe you can try but chances are I won't find a good solution since all these videos talk about force unmounting not the other way round.
@@shikhab2250 I don't have the drive anymore. Luckily, I was able to take it back to the vendor and get a replacement drive for free. And they told me the same thing the repair people did: "ALWAYS keep your most important data backed up on two or more drives, because external hard disk drives really suck, and the manufacturers know it". Back it up while you're working on it so that you know you have it in more than one place.
This is a waste of time. I had to listen to a commercial when all I want is a command line. A few lines of text would be better and at least one could copy and paste.
