Q: all OSX drives got converted to windows drives, HELP!
Mac Pro 4,1 (flashed to 5,1)
3.33ghz hex-core Xeon x 2
48 GB RAM
Running OSX 10.10.5 and Windows 7 SP1 via Bootcamp
5 Hard Drives total; partition layout:
(all disk numbers are windows based using windows' "disk management" program (can't remember their OSX designations)
disk 0 (120GB SSD): BOOTCAMP drive, win 7 SP1 installed (NTFS)
disk 1 (640GB HDD): DEDICATED OSX BACKUP (10.10.5)...I clone my main OSX drive to this drive daily (HFS)
disk 2 (2TB HDD): Windows Files and Archives (NTFS)
disk 3 (2TB HDD): OSX Files and Backups organized into 4 partitions (all partitions are HFS):
partition 1: OSX BACKUP...I also clone my main OSX drive to this drive daily (all bootable clones done with Cronosync)
partition 2: PROJECT BACKUP (backups of current and past projects)
partition 3: OTHER BACKUP: this holds my time machine backups and other miscellaneous backups
partition 4: SAMPLE DRIVE: I do music production, so I keep my sample libraries here.
disk 4 (256GB PCIe SSD): Two Partitions:
partition 1: MAIN OSX DRIVE: Running 10.10.5, my master drive (HFS)
partition 2: WINDOWS FAST STORAGE: used for installing windows programs that benefit greatly from faster speeds.(NTFS)
Will outline how I got to this point step by step :-\
1) Accessing Mac partitions over while in windows (just opening certain folders on certain drives) would cause BSOD. Based on internet suggestions, assumed the AppleHFS driver in windows was faulty so decided to install MacDrive 8...big mistake!
2) after installing MacDrive, I disabled the AppleHFS.sys file in windows/system32/drivers by renaming it to extension .bad
3) Was working on some stuff in windows for a few days so I stayed on that side for awhile. Was trying to copy a large folder (30 GB) to my Bootcamp drive, but windows gave an error that it was out of memory. This would be followed by the Bootcamp drive locking up completely so I'd have to hard shutdown. Did this a few times. Eventually got the issue corrected by Over Provisioning the drive (forgot to do that before installation of Windows).
4) A few times whle accessing the recycle bin, MacDrive would warn me that my project backup partition was damaged or corrupted and asked if I wanted to mount it. Decided around this point to switch back to OSX using the Bootcamp control panel, lo and behold all of my OSX partitions had been turned into windows drives!
4) Panicked, I shutdown and restarted, holding the option key. The only drives that showed up were Windows (disk 0) and Recovery 10.10.5...all OSX drives are not visible in EFI as mac drives.
5) I uninstalled MacDrive and reverted the old AppleHFS.sys file to its normal state. Drives are all accessible within windows (and all files are seemingly intact, didn't go exploring too hard for fear of more BSOD's). No change in boot camp control panel or at system boot. Mac drives still shown as windows drives.
6) Tried booting into the internal Recovery...didn't work. Would cause an endless loop of showing the apple and the loading bar would get to about halfway before it reboots and tries again.
7) Tried Resetting the PRAM and SMC...PRAM reset didn't go as advertised...it would chime once, get grey screen for 1 second and then about another 20 seconds til another chime (I"m holding cmd+opt+P+R the whole time), so I don't think it's the "2 chimes" for PRAM reset.
8) Created a bootable yosemite recovery drive (twice!), but would only load halfway followed by a restart. endless loop again.
9) Internet recovery doesn't work...all methods of recovery result in endles loop of restarts.
10) downloaded gdisk for windows as suggested here: Mac drive no longer showing up as boot option? but not sure how to use it to repair the drives.
Any help in repairing at least one drive enough for me to get back into OSX and/or recovery would be greatly appreciated!
Mac Pro, OS X Yosemite (10.10.5)
Posted on Nov 10, 2015 9:11 PM
Let us start with disk0s2. Please post the output of
sudo dd if=/dev/rdisk0s2 count=1 2>/dev/null | hexdump -C
for the record.
We are going to switch the partition type from MS Data (0700) to Apple HFS (AF00). Gdisk will automagically correct the Partition GUID for
409640 263651024 2 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7
sudo gdisk /dev/disk0
p
t
2
AF00
p
w
y
Unmount all partitions of disk0 using Disk Utility, mount them, and test that you can see OSX files. I assume no data has been touched on this.
Posted on Nov 14, 2015 4:10 PM





