Installation pages setup-disk script alpine main single
This will setup the destination usage of the files
Witch disk choose to use?
To choose the disk destination .. commonly sda are the hard disk cos sdb the USB boot or CD/DVD image
How would be used?
Then choose type of installation .. those are described at Setup modes section at Alpine setup scripts wiki page. "sys" mode is the familiar install to disk well knowed for usage as main OS to computers.
After all a confirmation question will raised, type "y" if everything are ok and the setup will proceed to erase, format and copy the files to the destination disk choose!