found 441033 1.8.8.git.2008.03.24-11 retitle 441033 parted breaks GPT/MBR hybrid system (Intel Mac) thanks
Hi, When updating GPT partition table, parted assumes system is pure EFI booted with GUID partition table (GPT). This is not the case for Intel Mac or other newer MOBO if the user wishes to use BIOS emulation. parted has 2 problems here: * It erase first 444=(512-2-64-2) bytes where classic MBR bootloader is installed. --> It should preserve it (at least when hybrid partition is found) * It erases partition data for /dev/sda2, /dev/sda4, and /dev/sda4 stored in the last part of MBR. --> It should update it following updated GPT data like gptsync does for hybrid partition. I suggest to add one more mklabel option: something like "gpt-hybrid" For system with matching initial partition tables between GPT and MBR, assume it as "gpt-hybrid". For system with non-zero byte at the first byte of disk with GPT, ask user about updating MBR contents if it is not in sync. For "gpt-hybrid" system, never over write first 444=(512-2-64-2) bytes and always update last 64+2 bytes by GPT configuration just like gptsync in refit source package does. (I guess borrowing it into parted is good idea.) For people looking for workaround for debian-installer, see http://wiki.debian.org/MacBook/DebianInstallTutorial As for the original bug reporter's complain that partition type is the same as windows, it seems it is by design. As I see http://en.wikipedia.org/wiki/GUID_Partition_Table under "Partition entries (LBA 2–33)", both OS uses "Partition type GUID" EBD0A0A2-B9E5-4433-87C0-68B6B72699C7 Thus no way to distinguish them apart. If the original reporter does not like message given by other partitioning tools such as gptsync reporting it as "EFI System (FAT)", he needs to complain to that program. msftres seems to be some macOS thingy though. Cheers, Osamu -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
