Mac Pro network reinstallation System

Windows 7 is installed in Mac Pro network reinstallation system and Windows 7 is used as the disk tool to split the partition into two partitions. As a result, the mac OS is removed. Now, the mac OS is reinstalled, record process 1. restart the computer, press and hold the option key, press command + R to go to internet recovery 2. Download the disk tool for 1 hour. 3. Enter the disk tool and erase all the ms-dos partitions. 4. Select the hard disk and click the partition on the right, select 1 partition, click "option" below, and select "GUID... "Click the partition button 5. Exit the disk tool after the end, and select mac OS x lion for installation (do not restart, or re-download the disk tool again) 6. start network installation for more than N hours