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MBR disk dual boot messed up, SL and Vista
Hi,
I've had Snow Leopard and Vista dual booting for awhile, but I messed it up yesterday. I went to edit Vista's BCD with the BCDEdit command-line tool, but I got an error. Google said I needed to to set my Windows partition as active so I used the Windows Disk Management tool. But when I restarted the computer PC EFI didn't load. So I used the Windows Disk Management tool to set my SL partition as active...hence my problem. Now PC EFI loads in GUI mode (before it loaded in non-GUI) with two options: Windows and Windows NTFS. The first loads Vista and the second (presumably SL) loads a black screen with a blinking cursor. If I use the Windows Disk Management tool to set the Windows partition as active, it goes straight to windows. I booted into the SL install disk and used fdisk to set the SL partition as active. But I get the PC EFI same as described before. I also tried to 'Repair Disk' from the Disk Utility on the installation disk and I get an error saying it failed the file system validation (because it thinks it's NTFS but it's actually HFS+). The disk is MBR. Is there a way for me to fix my problem? A tool to repair the partition or partition map? I have an extra partition if it would help to have another installation of OS X to work from. I also posted this question at insanelymac. Dell Inspiron 1525 OS X Mobile Intel® GM965 Express Chipset Mobile Intel® Graphics Media Accelerator X3100 Dell Wireless 1390 WLAN MiniCard (BCM4312) 2.0GHz Core 2 Duo T7250 processor 3 GB 667 MHz DDR2 SDRAM |
#2
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I'd try re-installing your boot loader, or installing another one (Chameleon, Boot Think, or maybe even GRUB 2).
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#3
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Fixed!
fdisk manual page Boot to OS X installation disk. Boot to OS X installation disk. Open Terminal. Code:
# fdisk -e /dev/rdisk0 rdisk0 0 is the disk number. If you only have one hard drive 0 is most likely the correct number. Code:
Note the number (#) of the partition to be changed. Code:
# setpid 1 Code:
# AF Code:
# write Code:
# exit 💡 Deploy cloud instances seamlessly on DigitalOcean. Free credits ($100) for InfMac readers. Dell Inspiron 1525 OS X Mobile Intel® GM965 Express Chipset Mobile Intel® Graphics Media Accelerator X3100 Dell Wireless 1390 WLAN MiniCard (BCM4312) 2.0GHz Core 2 Duo T7250 processor 3 GB 667 MHz DDR2 SDRAM Last edited by flackend; 05-21-2010 at 08:01 PM. |