Setup microSD card - Getting Started With Beagle Bone

I followed the instructions on the link: Debian: Getting Started with the BeagleBone Black - Linux Guides - Electronic Component and Engineering Solution Forum - TechForum │ DigiKey
when i get to step: Setup microSD card. I got this error, I don’t know why it happens and how to fix it

Ah i see the problem!

/dev/sdb is 1.3MB you just broke something in your system!

Hopefully it wasn’t efi, or something else important…

sfdisk syntax change happened after 2.26.x line…

ps, your logged in a ‘root’ on ubuntu, which ‘root’ is usually disabled, and calling ‘sudo’ while ‘root’… Don’t do that…

Edit, this kinda smells like VMware/VirtualBox/etc, random usb issues with adapters.