I have an macbook air late 2008 running osx El capitan and I wanted to erase my driver and reinstall the macos. So first i booted into recovery mode and tried formating my hard dive in disk utility but then I got an error "MediaKit reports not enough space on device for requested operation" then again I tried the same thing for 3 times and it still showed me the same error. Then I tried formating the drive in terminal but I still get the same error. I tried searching the net and found solutions only for external drive and found no solution for a internal one. So pls tell me a solution to erase and reinstall the os in my mac.
Note: I am trying to reinstall the OS on the primary internal disk that is disk0.