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===Installing UBUNTU=== * NOTE: The following instructions are copied from Rod Smith's instructions here: http://www.rodsbooks.com/ubuntu-efi/. * Boot into Os X and find out using disk utility what the disk number for the new HDD is. * Open Terminal program and type: (replace diskN with the correct disk number, eg. disk3). sudo gdisk /dev/diskN * Type '''p''' to display partition table. Verify that it's the same one shown by Disk Utility. (Note that Disk Utility hides the EFI System Partition (ESP), which is normally the first partition on the disk.) * If you created a Linux partition, type '''d''' in gdisk to delete it. Enter its number when prompted. (If you created multiple partitions for Linux with the intention of using them as you created them, you can skip this step.) * In gdisk, type '''n''' to create a new partition. Give it a number of 99, hit the Enter key to use the default starting sector (the program may tell you it's changed the sector value, but you can ignore this message), '''+128M''' as the ending sector, and a hex code of '''ef02'''. **This creates a BIOS Boot Partition of 128 MiB at the start of the largest block of free space on the disk. This partition will be used by the initial Ubuntu GRUB installation, but you can delete it once you've got native EFI booting working. 128 MiB is actually much bigger than is required for this purpose, but OS X likes to see gaps between partitions when it installs or upgrades the OS, so when you eventually delete this partition, it will leave the type of gap that OS X likes to see. (If you created all your Linux partitions in OS X's Disk Utility, you can put the BIOS Boot Partition in one of the gaps that Disk Utility leaves, but you may need to accept a default value or use +1M rather than enter +128M as the end value.) * Type '''p''' again to see the results * Type '''w''' to save changes and type y to confirm this choice. [[File:gdisk_setuphdd.png]] * Insert USB boot drive for Ubuntu into the computer. * Restart Mac Pro and wait for it to boot to rEFInd screen. * Select "boot from bootX64.efi on UBUNTU" or the option that you can identify as your USB boot drive. * After booting into Ubuntu Live, select Install Ubuntu and proceed with a normal Ubuntu installation, except as noted in the next few steps. * When the "Installation Type" dialog box appears, select "Something Else." * You will initially see a partitioning screen with your original OS X partitions, a biosgrub partition (what Ubuntu's partitioner calls the BIOS Boot Partition), and free space at the end of the disk. Select the free space and click Add to begin adding partitions. *Create partitions for your Ubuntu installation in the free space near the end of the disk. (If you did this in OS X's Disk Utility, you should modify each partition by selecting it and clicking Change, then clicking the Format option and setting an appropriate filesystem and mount point.) * Make '''/''', '''swap''', and '''/home''' partitions. ** '''swap''' should be created first, should be 1-2X RAM size, should be primary, and select Linux swap or swap space for type. ** '''/''' should be the root partition, should be ~100 GB in size, should be logical and ext4 type. ** '''/home''' should be the rest of the drive, should be logical and ext4 type. *Be sure that the "Device for boot loader installation" option is set to the same drive (it will include a complete name for your hard disk) *Click Install now and go through the final selection steps. *When the installation finishes, reboot the computer.
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