Sunday, December 28, 2014

partitioning - Do I have more than 4 Primary partition on my MBR disk?




I was trying to install Linux on the unallocated space on my disk and ran into some problems. After examining the disk, it appears that there are 5 primary partitions and a chunk of unallocated space.



In windows disk manager, they are all tagged as "Primary" (inluding the 1st 100MB "system reserved" parition), except for the "Unallocated space".



It seems to be a "basic" MBR disk, as evidenced by Properties->Volume in Windows. In fdisk, the disk type is listed as "dos" which also means MBR.



I know that MBR disks are limited to 4 primary partitions. So how is this possible?



Screenshot


Answer




I have found mention of a bug in the Windows Partition Manager (sorry, the "Windows Disk Management snap-in"), so it might be that, I'll have to investigate more using another tool.





So anyway I booted in Ubuntu and ran gparted and it does indeed seem to be "nothing but a bug" in the Windows Disk Management tool.



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