I’m running win7 x64 and OS X on MacBook air. Yesterday i made regular bootcamp back-up. When back-up is processing, i cancel it. After that, i can’t boot to win7.
Results of the “sudo gpt -r -vv show disk0”
Results of the “sudo fdisk /dev/disk0”
Is there any recommendation? thank you
MacBook Air, Mac OS X (10.5.1)
The 'backup' tool seems to have modified your GPT#4 entry and obliterated your MBR. What type of a tool is this?
I back up mac with time machine.
Is it possible to reboot win7, thera are very important files in it. thank you
TM should not modify any partitioning information, unless a restore was attempted instead of a backup. Are you certain it was a backup? Also the long number after GPT and a number is the same for entries 2 and 4, which indicates a HFS+ file system.
Can you post the output of diskutil list command?
In the Console logs, can you look for backup messages and check what happened?
We can attempt recovery once it is known what happened?
Results of comman "diskutil list"
Can you run
sudo dd if=/dev/rdisk0s4 count=1 2>/dev/null | hexdump -C
the results of comman "dd",
can you tell me the use of this command is ???
The purpose is to dump the first block of the NTFS header to see if the file system is intact.
You may need to download Testdisk to look for deleted partitions.
thank you for your help.
The results of "dd" are all zero. Does it mean the file system is not intact or win7 partition is deleted?
I have download Testdisk for mac，but i am not sure i can use it correctly.
Tomorrow , I'll be on business for a couple of days. I'll continue to solve this problem after a week
🙂
When you get back, there is a step-by-step for partition recovery which you may want to look at .
I have already come back, can you tell me where i can find a step-by-step user guide?
thank you
This is the step-by-step guide - http://www.cgsecurity.org/wiki/TestDisk_Step_By_Step
Due to issues with Apple Discussions forum, the screen shots you posted are no longer visible in this thread. 😟
Can you post text versions of the output of the following? You can use cut-and-paste. Please remove any personal information as you see fit.
1. diskutil list
2. sudo gpt -vv -r show /dev/"Bootcampdisk" (replace the string "Bootcampdisk" with disk0, disk1, disk2, etc.).
3. sudo fdisk /dev/"Bootcampdisk"
4. sudo dd if=/dev/r"Bootcampdisk" count=1 2>/dev/null | hexdump -C (please notice the "r" before the "Bootcampdisk" name).
This will allow information to be recorded here before any changes are made.
The output of "diskutil list"
applematoMacBook-Air:~ apple$ diskutil list
/dev/disk0
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *251.0 GB disk0
1: EFI 209.7 MB disk0s1
2: Apple_HFS Macbook-air 125.0 GB disk0s2
3: Apple_Boot Recovery HD 650.0 MB disk0s3
4: Apple_HFS BOOTCAMP 125.0 GB disk0s4
the output of command sudo gpt -vv -r show /dev/"disk0"
applematoMacBook-Air:~ apple$ sudo gpt -vv -r show /dev/"disk0"
gpt show: /dev/disk0: mediasize=251000193024; sectorsize=512; blocks=490234752
gpt show: /dev/disk0: PMBR at sector 0
gpt show: /dev/disk0: Pri GPT at sector 1
gpt show: /dev/disk0: Sec GPT at sector 490234751
start size index contents
0 1 PMBR
1 1 Pri GPT header
2 32 Pri GPT table
34 6
40 409600 1 GPT part - C12A7328-F81F-11D2-BA4B-00A0C93EC93B
409640 244140624 2 GPT part - 48465300-0000-11AA-AA11-00306543ECAC
244550264 1269536 3 GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC
245819800 1640
245821440 244151128 4 GPT part - 48465300-0000-11AA-AA11-00306543ECAC
489972568 262151
490234719 32 Sec GPT table
490234751 1 Sec GPT header
the output of sudo gpt -vv -r show /dev/"disk0s1"
applematoMacBook-Air:~ apple$ sudo gpt -vv -r show /dev/"disk0s1"
gpt show: /dev/disk0s1: mediasize=209715200; sectorsize=512; blocks=409600
gpt show: /dev/disk0s1: MBR at sector 0
start size index contents
0 1 MBR
1 409599
the output of sudo gpt -vv -r show /dev/"disk0s2"
applematoMacBook-Air:~ apple$ sudo gpt -vv -r show /dev/"disk0s2"
gpt show: unable to open device '/dev/disk0s2': No such file or directory
Cannot boot to windows 7 after canceling bootcamp backup
