sanpedro Posted December 19, 2007 Share Posted December 19, 2007 Is it possible to partition a harddrive to have both? I'd like to put Leopard on GUID as from what I'm reading is the best thing to do, but I have my XP on MBR, and as I don't have the install disk I can't reinstall it. Before I seriosuly scrw up my drive I want to figure out if it'll work. Also, I have an extra internal drive for a laptop. Is it possible to install Leopard onto this and then just switch them out whenever I want to use XP or Leopard? I'd get rid of Windows alltogether if it wasn't easier to watch EPL games on it. Link to comment https://www.insanelymac.com/forum/topic/76886-guid-and-mbr/ Share on other sites More sharing options...
Hyper X Posted December 19, 2007 Share Posted December 19, 2007 You can have MBR or GUID.. not both You can run each os and seperate drive and boot freely though Link to comment https://www.insanelymac.com/forum/topic/76886-guid-and-mbr/#findComment-543233 Share on other sites More sharing options...
thegodfaza Posted December 19, 2007 Share Posted December 19, 2007 On x86 or x64 architectures you need to use MBR. Most peoples computers won't boot past the BIOS screen with GUID. Link to comment https://www.insanelymac.com/forum/topic/76886-guid-and-mbr/#findComment-543246 Share on other sites More sharing options...
more or less Posted December 19, 2007 Share Posted December 19, 2007 Is it possible to partition a harddrive to have both? I'd like to put Leopard on GUID as from what I'm reading is the best thing to do, but I have my XP on MBR, and as I don't have the install disk I can't reinstall it. Before I seriosuly scrw up my drive I want to figure out if it'll work. Also, I have an extra internal drive for a laptop. Is it possible to install Leopard onto this and then just switch them out whenever I want to use XP or Leopard? I'd get rid of Windows alltogether if it wasn't easier to watch EPL games on it. Yeah its possible, but its not easy to do. And yes, you can certainly install in on another internal drive and tht can be of any format you want. I believe the way to "multi-boot" is to have a GUID drive, then use a partitioning tool to create what is called an "MBR boot wrapper" that a program like GRUB will be able to detect and use to fool XP into thinking it's on an MBR drive. I believe this is also what Bootcamp does if you create a FAT32 partition for XP, but I am not postive. You will need to do some searching as I cannot locate the link I posted that explains this, but it was a thread about hacking bootcamp in the "post-install" forum a couple of weeks ago. It should be easy to find if you are really that interested, tho... Link to comment https://www.insanelymac.com/forum/topic/76886-guid-and-mbr/#findComment-543318 Share on other sites More sharing options...
macgirl Posted December 21, 2007 Share Posted December 21, 2007 You can have MBR or GUID.. not both You can run each os and seperate drive and boot freely though Not true. On x86 or x64 architectures you need to use MBR. Most peoples computers won't boot past the BIOS screen with GUID. Not true, both of my rigs (x64s) boot perfectly with GUID. Yeah its possible, but its not easy to do. And yes, you can certainly install in on another internal drive and tht can be of any format you want. Is moer easy than you think, even, some say gptsync reports that GUID formatted by Diskutil is already synced with MBR see this also: http://forum.netkas.org/index.php/topic,2.msg572.html#msg572 Link to comment https://www.insanelymac.com/forum/topic/76886-guid-and-mbr/#findComment-545259 Share on other sites More sharing options...
Korrupted Posted December 21, 2007 Share Posted December 21, 2007 I agree with Macgirl here. I boot Tiger/Leopard in a dual boot config on my external USB IDE drive on GUID, and it works fine. On my internal drives I just have Windows/data partitions. Link to comment https://www.insanelymac.com/forum/topic/76886-guid-and-mbr/#findComment-545304 Share on other sites More sharing options...
Hyper X Posted December 21, 2007 Share Posted December 21, 2007 Not true. You cannot have MBR and GUID on the same drive... show me otherwise please. Link to comment https://www.insanelymac.com/forum/topic/76886-guid-and-mbr/#findComment-545515 Share on other sites More sharing options...
macgirl Posted December 21, 2007 Share Posted December 21, 2007 what you cannot is format with the two options, BUT partitions for win and linux are recognized as MBR in those OSes. I will install on an aditional disk and test all this to prove it. Link to comment https://www.insanelymac.com/forum/topic/76886-guid-and-mbr/#findComment-545595 Share on other sites More sharing options...
Megamixman Posted December 21, 2007 Share Posted December 21, 2007 You cannot have MBR and GUID on the same drive... show me otherwise please. GUID already has an MBR wrapper to prevent bootloaders from messing with it's partition table. Mac's Disk Utillity and gptsync, take advantage of this to present an MBR partition table along with the bootloader, which makes it a hybrid. So, in a sense you still don't have MBR, but in a sense you do. What you say is true though, you either have one or the other, or the hybrid, because they are mutually exclusive. Link to comment https://www.insanelymac.com/forum/topic/76886-guid-and-mbr/#findComment-545825 Share on other sites More sharing options...
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