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Intel, backup, and drive formats
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#2
bayoubengal 
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Posted 04 January 2008 - 11:52 AM
you only need to worry about partition map format if you are going to boot from the disk. if it is just a data disk, the partition map format should be irrelevant.
If you need to read a mac disk on Windows, buy MacDrive for Windows. it supplies HFS+ drivers for Windows to allow it to mount mac disks.
If you need to read a mac disk on Windows, buy MacDrive for Windows. it supplies HFS+ drivers for Windows to allow it to mount mac disks.
#3
Hurley42
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Posted 04 January 2008 - 11:57 AM
What is the advantage of GUID over Apple Partition Map? I have no need to boot from the backup drive. The article does not mention WHY choosing GUID is preferred. I am not about to change the partition without good reason.
#4
FCA
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Posted 04 January 2008 - 12:03 PM
just an imporant question for me...so if upgrade from my PowerBook G4 (PowerPC) to a MacBook Pro (Intel) what format it is needed on the external clone disc of my PowerBook (I'm selling it, so I'll make a clone of it in the external HD)???
thanks!
thanks!
#5
jb3710
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Posted 04 January 2008 - 12:36 PM
So instead of purchasing MacDrive for Windows, I could partion most of the drive in a time machine friendly format like GUID or HFS+ and then have a second partition formatted in FAT32 in order to share data between a Mac and PC (I'm thinking for one Mac using Boot Camp)?
I thought I read something about how Leopard could read new formats? Are any of them Windows compatible (other than the crippled FAT32)?
I thought I read something about how Leopard could read new formats? Are any of them Windows compatible (other than the crippled FAT32)?
#6
Chris Breen
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Posted 04 January 2008 - 12:39 PM
The glib answer to why you use GUID on an Intel Mac is because Apple says so. The not-so-glib answer is that some people have reported problems with Time Machine running on Intel Macs when the drive uses the Apple Partition Map scheme.
#7
bayoubengal
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Posted 04 January 2008 - 02:26 PM
quote from the article cited:
"Some hard disks ship with a Master Boot Record (MBR) partition type. For >>>THESE<<< disks, you will need to change the partition type".
These instructions are for drives formated for DOS PCs. I haven't tried it, but you should not need to reformat a drive "Apple Partition Map" just to use it with a PPC or reformat it to "'GUID' partition scheme" just to use it with an intel mac. Intel macs use "Apple Partition Map" drives just fine and PPC macs use "'GUID' partition scheme" just fine.
The partition map format matters only if you are going to use the drive as a boot drive. Presumably, a time machine drive is just a data drive. One would not want to boot from it.
"Apple Partition Map" is the legacy system used with the old OpenFirmware system that PowerPC mac had. the new GUID system is for the Intel EFI firmware that intel macs use.
"Some hard disks ship with a Master Boot Record (MBR) partition type. For >>>THESE<<< disks, you will need to change the partition type".
These instructions are for drives formated for DOS PCs. I haven't tried it, but you should not need to reformat a drive "Apple Partition Map" just to use it with a PPC or reformat it to "'GUID' partition scheme" just to use it with an intel mac. Intel macs use "Apple Partition Map" drives just fine and PPC macs use "'GUID' partition scheme" just fine.
The partition map format matters only if you are going to use the drive as a boot drive. Presumably, a time machine drive is just a data drive. One would not want to boot from it.
"Apple Partition Map" is the legacy system used with the old OpenFirmware system that PowerPC mac had. the new GUID system is for the Intel EFI firmware that intel macs use.
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