Q: BOOTCAMP Partition lost after some updates in Yosemite
Hello Everyone,
I have a Mac Mini, bought in Dec 2013 and have been using Windows 8.1 since more than a year now. I did update it to OS Yosemite whenever it was available. But just 2 weeks back, I thought that its been many months now since I rebooted into Mac and there might be lots of updates pending. So I did that but right after the updates completed, when the Mac rebooted itself to finish installing the updates, the Bootcamp partition was gone. When I forcefully shut it down and rebooted back into Mac, the Bootcamp was not there in both, StartUp Disk Manager and Disk Utility.
Please Help Me. I have loads of important data on Bootcamp which I cannot afford to lose. Please save me from going into a state of depression if I lose that data.
On searching other threads I found that I have to post the output of the following commands from Terminal. So here's all the ground work done.
Please see below and help.
Maneesh-Mac:~ Maneesh$ df -h
Filesystem Size Used Avail Capacity iused ifree %iused Mounted on
/dev/disk0s2 559Gi 94Gi 465Gi 17% 24623723 121860650 17% /
devfs 180Ki 180Ki 0Bi 100% 622 0 100% /dev
map -hosts 0Bi 0Bi 0Bi 100% 0 0 100% /net
map auto_home 0Bi 0Bi 0Bi 100% 0 0 100% /home
Maneesh-Mac:~ Maneesh$ diskutil list
/dev/disk0
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *1.0 TB disk0
1: EFI EFI 209.7 MB disk0s1
2: Apple_HFS Macintosh HD 600.0 GB disk0s2
3: Apple_Boot Recovery HD 650.0 MB disk0s3
4: Microsoft Basic Data 149.0 GB disk0s4
Maneesh-Mac:~ Maneesh$ diskutil cs list
No CoreStorage logical volume groups found
Maneesh-Mac:~ Maneesh$ sudo gpt -vv -r show /dev/disk0
Password:
gpt show: /dev/disk0: mediasize=1000204886016; sectorsize=512; blocks=1953525168
gpt show: /dev/disk0: Suspicious MBR at sector 0
gpt show: /dev/disk0: Pri GPT at sector 1
gpt show: /dev/disk0: Sec GPT at sector 1953525167
start size index contents
0 1 MBR
1 1 Pri GPT header
2 32 Pri GPT table
34 6
40 409600 1 GPT part - C12A7328-F81F-11D2-BA4B-00A0C93EC93B
409640 1171875000 2 GPT part - 48465300-0000-11AA-AA11-00306543ECAC
1172284640 1269536 3 GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC
1173554176 488956928
1662511104 291012608 4 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7
1953523712 1423
1953525135 32 Sec GPT table
1953525167 1 Sec GPT header
Maneesh-Mac:~ Maneesh$ sudo fdisk /dev/disk0
Disk: /dev/disk0 geometry: 121601/255/63 [1953525168 sectors]
Signature: 0xAA55
Starting Ending
#: id cyl hd sec - cyl hd sec [ start - size]
------------------------------------------------------------------------
1: EE 1023 254 63 - 1023 254 63 [ 1 - 409639] <Unknown ID>
2: AF 1023 254 63 - 1023 254 63 [ 409640 - 1171875000] HFS+
3: AB 1023 254 63 - 1023 254 63 [1172284640 - 1269536] Darwin Boot
4: 0C 1023 254 63 - 1023 254 63 [1662511104 - 291012608] Win95 FAT32L
Maneesh-Mac:~ Maneesh$ sudo dd if=/dev/rdisk0 count=1 2>/dev/null | hexdump -C
00000000 33 c0 8e d0 bc 00 7c 8e c0 8e d8 be 00 7c bf 00 |3.....|......|..|
00000010 06 b9 00 02 fc f3 a4 50 68 1c 06 cb fb b9 04 00 |.......Ph.......|
00000020 bd be 07 80 7e 00 00 7c 0b 0f 85 0e 01 83 c5 10 |....~..|........|
00000030 e2 f1 cd 18 88 56 00 55 c6 46 11 05 c6 46 10 00 |.....V.U.F...F..|
00000040 b4 41 bb aa 55 cd 13 5d 72 0f 81 fb 55 aa 75 09 |.A..U..]r...U.u.|
00000050 f7 c1 01 00 74 03 fe 46 10 66 60 80 7e 10 00 74 |....t..F.f`.~..t|
00000060 26 66 68 00 00 00 00 66 ff 76 08 68 00 00 68 00 |&fh....f.v.h..h.|
00000070 7c 68 01 00 68 10 00 b4 42 8a 56 00 8b f4 cd 13 ||h..h...B.V.....|
00000080 9f 83 c4 10 9e eb 14 b8 01 02 bb 00 7c 8a 56 00 |............|.V.|
00000090 8a 76 01 8a 4e 02 8a 6e 03 cd 13 66 61 73 1c fe |.v..N..n...fas..|
000000a0 4e 11 75 0c 80 7e 00 80 0f 84 8a 00 b2 80 eb 84 |N.u..~..........|
000000b0 55 32 e4 8a 56 00 cd 13 5d eb 9e 81 3e fe 7d 55 |U2..V...]...>.}U|
000000c0 aa 75 6e ff 76 00 e8 8d 00 75 17 fa b0 d1 e6 64 |.un.v....u.....d|
000000d0 e8 83 00 b0 df e6 60 e8 7c 00 b0 ff e6 64 e8 75 |......`.|....d.u|
000000e0 00 fb b8 00 bb cd 1a 66 23 c0 75 3b 66 81 fb 54 |.......f#.u;f..T|
000000f0 43 50 41 75 32 81 f9 02 01 72 2c 66 68 07 bb 00 |CPAu2....r,fh...|
00000100 00 66 68 00 02 00 00 66 68 08 00 00 00 66 53 66 |.fh....fh....fSf|
00000110 53 66 55 66 68 00 00 00 00 66 68 00 7c 00 00 66 |SfUfh....fh.|..f|
00000120 61 68 00 00 07 cd 1a 5a 32 f6 ea 00 7c 00 00 cd |ah.....Z2...|...|
00000130 18 a0 b7 07 eb 08 a0 b6 07 eb 03 a0 b5 07 32 e4 |..............2.|
00000140 05 00 07 8b f0 ac 3c 00 74 09 bb 07 00 b4 0e cd |......<.t.......|
00000150 10 eb f2 f4 eb fd 2b c9 e4 64 eb 00 24 02 e0 f8 |......+..d..$...|
00000160 24 02 c3 49 6e 76 61 6c 69 64 20 70 61 72 74 69 |$..Invalid parti|
00000170 74 69 6f 6e 20 74 61 62 6c 65 00 45 72 72 6f 72 |tion table.Error|
00000180 20 6c 6f 61 64 69 6e 67 20 6f 70 65 72 61 74 69 | loading operati|
00000190 6e 67 20 73 79 73 74 65 6d 00 4d 69 73 73 69 6e |ng system.Missin|
000001a0 67 20 6f 70 65 72 61 74 69 6e 67 20 73 79 73 74 |g operating syst|
000001b0 65 6d 00 00 00 63 7b 9a 43 7b 00 00 00 00 00 fe |em...c{.C{......|
000001c0 ff ff ee fe ff ff 01 00 00 00 27 40 06 00 00 fe |..........'@....|
000001d0 ff ff af fe ff ff 28 40 06 00 b8 64 d9 45 00 fe |......(@...d.E..|
000001e0 ff ff ab fe ff ff e0 a4 df 45 20 5f 13 00 00 fe |.........E _....|
000001f0 ff ff 0c fe ff ff 00 e8 17 63 00 80 58 11 55 aa |.........c..X.U.|
00000200
Maneesh-Mac:~ Maneesh$
Additionally, I thought even these might be helpful to analyze.
Maneesh-Mac:~ Maneesh$ sudo gdisk /dev/disk0
GPT fdisk (gdisk) version 1.0.0
Warning: Devices opened with shared lock will not have their
partition table automatically reloaded!
Partition table scan:
MBR: hybrid
BSD: not present
APM: not present
GPT: present
Found valid GPT with hybrid MBR; using GPT.
Command (? for help): p
Disk /dev/disk0: 1953525168 sectors, 931.5 GiB
Logical sector size: 512 bytes
Disk identifier (GUID): 000038B3-79FB-0000-8A21-000018200000
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is 1953525134
Partitions will be aligned on 8-sector boundaries
Total free space is 488958357 sectors (233.2 GiB)
Number Start (sector) End (sector) Size Code Name
1 40 409639 200.0 MiB EF00 EFI system partition
2 409640 1172284639 558.8 GiB AF00 Customer
3 1172284640 1173554175 619.9 MiB AB00 Recovery HD
4 1662511104 1953523711 138.8 GiB 0700 BOOTCAMP
Command (? for help): r
Recovery/transformation command (? for help): o
Disk size is 1953525168 sectors (931.5 GiB)
MBR disk identifier: 0x00007B43
MBR partitions:
Number Boot Start Sector End Sector Status Code
1 1 409639 primary 0xEE
2 409640 1172284639 primary 0xAF
3 1172284640 1173554175 primary 0xAB
4 1662511104 1953523711 primary 0x0C
Thanks in advance for all the help.
Maneesh
Mac mini, OS X Yosemite (10.10.3)
Posted on Jun 20, 2015 10:48 AM
Install GPT Fdisk (aka gdisk).
Leave your Testdisk display and start a new Terminal Window. You need to use the following steps. If you see any error messages during the following steps, please stop and post back here with the error message. The following steps have values from your Testdisk output (and you can verify) in Steps 7 and 8. Please notice the '+' sign in step 8 (this is called offset notation). The text in parentheses is for informational purpose to describe the action being taken. Gdisk has one-character commands except when entering numbers.
Rebuild GPT4 using start/end offsets
- Sudo gdisk /dev/rdisk0
- P (print the full list of parts)
- D (delete)
- 4 (part 4)
- N (new part)
- 4 (part 4)
- 1173555200 ( - Start offset in bytes or the start point for Bootcamp part)
- +779968505 ( - Size offset, as opposed to End offset)
- 0700 (Windows part type)
- P (print list of all parts just to see what changes will be made)
- W (Write the new GPT)
- Y (Yes! really write the new GPT)
This will delete and re-write the GPT partition info for /dev/disk0s4.
Rebuild MBR to match the new GPT information thus resetting the Hybrid MBR. Use defaults for other questions (like partition codes). The only values that need modifications are the Boot flags and step 10. Accept all other defaults that Gdisk offers. Please see the sample Q&A as an example. These steps can be repeated if you make a mistake before you get to Step 12, otherwise start from Step 1 for these steps. Step 6 has numbers which are typed with a space between the numbers.
- Sudo gdisk /dev/rdisk0
- P (Print list of parts)
- R (Recover)
- O (print current Hybrid MBR)
- H (chooses Hybrid)
- Partitions numbers to be hybridized: 2 3 4
- Y (Good for GRUB question)
- N (part 2 boot flag)
- N (part 3 boot flag)
- Y (part 4 boot flag make NTFS bootable partition)
- O (print current Hybrid MBR)
- W (Write the new MBR)
- Y (Yes! write the new MBR)
- Reboot
Here is sample Q&A for this section. Please notice the Press Enter/Return.
Place EFI GPT (0xEE) partition first in MBR (good for GRUB)? (Y/N): Y
Creating entry for GPT partition #2 (MBR partition #2)
Enter an MBR hex code (default AF): Press Enter/Return
Set the bootable flag? (Y/N): N
Creating entry for GPT partition #3 (MBR partition #3)
Enter an MBR hex code (default AB): Press Enter/Return
Set the bootable flag? (Y/N): N
Creating entry for GPT partition #4 (MBR partition #4)
Enter an MBR hex code (default 07): Press Enter/Return
Set the bootable flag? (Y/N): Y
Test 1 - Does Bootcamp Volume show up in Finder?
Test 2 - Can you see files in Bootcamp Volume?
Test 3 - Can you select Bootcamp in System Preferences -> Startup Disk?
Test 4 - If Test 3 is successful, select Bootcamp and Click Restart.
Posted on Jun 20, 2015 12:44 PM