When MacBook Pro users try to erase their external hard drive and reformatting it to MS-DOS (fat) using Disk Utility, they getting error message like “Disk erase failed with the following request: invalid request”
How to fix Disk erase failed with the error invalid request issue on Mac
- From the Partition tab, pick a partition scheme (# of partitions)
- Scroll down to bottom above the + and – signs. There’s now a choice that says “Options”.
- Click Options and pick “GUID Partition Table” instead of “Master boot record”.
SEE ALSO : How to fix Disk erase failed with the error Unable to write to the last block of the device
Many Mac users reported, this solution still fix hard drive formatting issue in Mac OS X Yosemite and Mavericks.
If you knew any other solutions, inform us via comment.