Linux came preinstalled with formatted only half of a disk.
I run fdisk. it allows me to create partitions on the rest of a disk, but when I try to write this info on disk getting error:
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
Re-read table failed with error 16: Device or resource busy.
Reboot your system to ensure the partition table is updated.
I reboot my machine and all my new patitions disappear.