rlf Posted October 5, 2013 Share Posted October 5, 2013 I can't believe that I'm the only one so far to experience this. I'm posting this as a warning. I wanted a fresh installation of Mavericks, so I used Maverick's installer Disk Utility to erase my current Mountain Lion partition. For some reason, "Core Storage" kicked in and rearranged the partitions on my hard drive. All I did was select the partition "testOSX" and "erase". So, I tried to re-partition, but the partition pop-up was greyed out. I had to use GPARTED to remove all of the existing partitions before I could use Disk Utility to re-partition the drive. I thought this was a fluke, so I tried a second time and the problem repeated. As a test, I proceeded anyway to install Mavericks and Chameleon to "testOSX" but Chameleon got confused and couldn't boot it. Cleaning up and partitioning/erasing with the Disk Utility in Mountain Lion gave a successful booting installation of Mavericks. Partitions - Before and After "Erasing" The "types" associated with the partitions changed as well. Before 3 TB Hitachi - Media disk0s1 - EFI (hidden) testOSX - Mac OS Extended (Journaled) TM - Mac OS Extended (Journaled) After testOSX - Logical Volume Group testOSX - Logical Partition diskOs1 - EFI (hidden) testOSX - Core Storage Physical Volume (hidden) Boot OS X - Apple Boot Partition (hidden) TM - Mac OS Extended (Journaled) Link to comment https://www.insanelymac.com/forum/topic/292449-mavericks-disk-utility-rearranged-partitions/ Share on other sites More sharing options...
jamiethemorris Posted October 6, 2013 Share Posted October 6, 2013 That's one hell of a bug, unless it's one of Mavericks' new "features..." Thanks for the heads up. I haven't checked to see if it did anything like this to my drive on my mbp. Link to comment https://www.insanelymac.com/forum/topic/292449-mavericks-disk-utility-rearranged-partitions/#findComment-1951225 Share on other sites More sharing options...
Bongas Posted October 15, 2013 Share Posted October 15, 2013 What can I say, this is probably why my WD my book studio II reset itself after I installled Mavericks GM. All my partitions on that drive lost and it's even reproducible. Bad one! To clarify, I installed Mavericks GM on the internal drive on my Mac mini, after a restart I noticed my external drive had been...ehum...tampered with. Link to comment https://www.insanelymac.com/forum/topic/292449-mavericks-disk-utility-rearranged-partitions/#findComment-1954899 Share on other sites More sharing options...
digital_dreamer Posted October 15, 2013 Share Posted October 15, 2013 Do you have a Fusion drive setup, or are you using your EFI partition to store the bootloader's /Extra directory? I've seen similar behaviors when a EFI partition is formatted as HFS. Disk Utility displays it like seen above, but I've never seen a partition shown before the EFI partition. Anyhow, the fact that you have a Boot OS X helper partition indicates that your system thinks it has a RAID or Fusion setup. Odd, indeed. Do the following Terminal commands reveal anything?: diskutil cs list or diskutil appleRAID list regards, MAJ Link to comment https://www.insanelymac.com/forum/topic/292449-mavericks-disk-utility-rearranged-partitions/#findComment-1954906 Share on other sites More sharing options...
Bongas Posted October 15, 2013 Share Posted October 15, 2013 My internal drive is a fusion drive (apples) and the 2 drives in the WD enclosure was setup up as as raid 1. Link to comment https://www.insanelymac.com/forum/topic/292449-mavericks-disk-utility-rearranged-partitions/#findComment-1954916 Share on other sites More sharing options...
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