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furk

macrumors newbie
Original poster
Nov 16, 2011
3
0
Hi all mates i'm new here.

I've got a biiig problem with my macbook air. It has 120gb HDD partitioned 40gb snowleopard and 80gb bootcamp with win7. Win7 was not booting anymore complaining about boot record corruption but ntfs partition was still correctly mounted on leopard. I've run disktest with ubuntu remix rescue and now bootcamp partition is not mounted anymore even on leopard :(

Here is my current situation:

diskutil list

*** Report for internal hard disk ***

Current GPT partition table:
# Start LBA End LBA Type
1 40 409639 EFI System (FAT)
2 409640 88227879 Mac OS X HFS+
3 88492032 234440703 Basic Data

Current MBR partition table:
# A Start LBA End LBA Type
1 1 409639 ee EFI Protective
2 409640 88227879 af Mac OS X HFS+
3 * 88492032 234440703 0b FAT32 (CHS)

MBR contents:
Boot Code: Unknown, but bootable

Partition at LBA 40:
Boot Code: None (Non-system disk message)
File System: FAT32
Listed in GPT as partition 1, type EFI System (FAT)

Partition at LBA 409640:
Boot Code: None
File System: HFS Extended (HFS+)
Listed in GPT as partition 2, type Mac OS X HFS+
Listed in MBR as partition 2, type af Mac OS X HFS+

Partition at LBA 88492032:
Boot Code: None
File System: Unknown
Listed in GPT as partition 3, type Basic Data
Listed in MBR as partition 3, type 0b FAT32 (CHS), active

[550]>sudo sudo fdisk /dev/disk0s3
Disk: /dev/disk0s3 geometry: 9084/255/63 [145948672 sectors]
Signature: 0xAA55
Starting Ending
#: id cyl hd sec - cyl hd sec [ start - size]
------------------------------------------------------------------------
1: 87 1023 254 63 - 1023 254 63 [ 88492032 - 57456640] NTFS VS
2: 00 0 0 0 - 0 0 0 [ 0 - 0] unused
3: 00 0 0 0 - 0 0 0 [ 0 - 0] unused
4: 00 0 0 0 - 0 0 0 [ 0 - 0] unused

this should be wrong situation of mbr shown by fdisk.

Using gdisk:

[551]>sudo sudo gdisk /dev/disk0s3
GPT fdisk (gdisk) version 0.8.1

Partition table scan:
MBR: MBR only
BSD: not present
APM: not present
GPT: not present


***************************************************************
Found invalid GPT and valid MBR; converting MBR to GPT format.
THIS OPERATION IS POTENTIALLY DESTRUCTIVE! Exit by typing 'q' if
you don't want to convert your MBR partitions to GPT format!
***************************************************************

Exact type match not found for type code 8700; assigning type code for
'Apple HFS/HFS+'

Warning! Secondary partition table overlaps the last partition by
33 blocks!
You will need to delete this partition or resize it in another utility.

Command (? for help): r

Recovery/transformation command (? for help): o

Disk size is 145948672 sectors (69.6 GiB)
MBR disk identifier: 0x00000000
MBR partitions:

Number Boot Start Sector End Sector Status Code
1 1 145948671 primary 0xEE

Recovery/transformation command (? for help): p
Disk /dev/disk0s3: 145948672 sectors, 69.6 GiB
Logical sector size: 512 bytes
Disk identifier (GUID): AD80F954-8EE2-464D-9F17-D0C7716F3DAC
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is 145948638
Partitions will be aligned on 2048-sector boundaries
Total free space is 88491998 sectors (42.2 GiB)

Number Start (sector) End (sector) Size Code Name
1 88492032 145948671 27.4 GiB AF00

This is some kind of gpt partition table backup loaded but i get overlapping problem and can't save.

Recovery/transformation command (? for help): l
Enter backup filename to load: gpt.backup
Warning! Current disk size doesn't match that of the backup!
Adjusting sizes to match, but subsequent problems are possible!

Recovery/transformation command (? for help): o

Disk size is 145948672 sectors (69.6 GiB)
MBR disk identifier: 0xB278B5DB
MBR partitions:

Number Boot Start Sector End Sector Status Code
1 1 409639 primary 0xEE
2 409640 88227879 primary 0xAF
3 * 88492032 234440703 primary 0x07

Recovery/transformation command (? for help): p
Disk /dev/disk0s3: 145948672 sectors, 69.6 GiB
Logical sector size: 512 bytes
Disk identifier (GUID): C3B164E4-D499-4802-BE37-FBD34DB1B173
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is 145948638
Partitions will be aligned on 2048-sector boundaries
Total free space is 264158 sectors (129.0 MiB)

Number Start (sector) End (sector) Size Code Name
1 40 409639 200.0 MiB EF00 EFI System Partition
2 409640 88227879 41.9 GiB AF00 NotQuiteMaxDisk
3 88492032 234440703 69.6 GiB 0700 BOOTCAMP

Recovery/transformation command (? for help): w

Warning! Secondary partition table overlaps the last partition by
88492065 blocks!
You will need to delete this partition or resize it in another utility.

Problem: partition 3 is too big for the disk.
Aborting write operation!
Aborting write of new partition table.

Sorry for the long post...i don't know what to try anymore :[
 

LiquidSpikes

macrumors regular
Jul 6, 2007
102
18
Everett, WA
Have you tried testdisk?

http://www.cgsecurity.org/wiki/TestDisk
http://www.cgsecurity.org/wiki/Data_Recovery_Examples

I think the MBR became corrupt...

You should be able to rebuild it with Testdisk. :)

-edit... sorry I just reread your post!

Here is what I would recommend, boot from a OSX Disk, fire up disk utility... see if it can find any partitions.

Repair your OSx partition, reboot. try to get back to one working OS.

after that if you are successful, then boot from a windows CD and run chkdsk, and BOOTREC. http://support.microsoft.com/kb/927392

See if it still sees the Windows installation, it will then try to make it bootable.

Are you using REFIT by chance?
 
Last edited:

furk

macrumors newbie
Original poster
Nov 16, 2011
3
0
Tried again testdisk and it did the trick. Analyze found correct partition and restored GPT & MBR.

Now snow leopard correctly mounts and reads bootcamp partition.

Windows 7 keep not booting claiming bad boot block. Already tried bootrec from win console.
 

furk

macrumors newbie
Original poster
Nov 16, 2011
3
0
Success. ;-)

chkdsk fixed filesystem, than i was able to use RebuildBcd and now windows is alive again.

Thanks for support!
 

LordJohnWhorfin

macrumors regular
May 28, 2002
166
37
Recovered my RAID-1 slice!

Found this thread through a search after my 2 drive RAID-1 mirrored array was taken down by a drive failure and the remaining healthy drive would refuse to mount ("You have inserted a drive that is not recognized by this computer, reformat/ignore/cancel"). DiskUtility reported the partition as "0xEE" so I figured maybe something had been clobbered in the partition info but the data itself might be recoverable.

TestDisk figured out the partition info in a few seconds and reconstituted the partition table, I wrote it to the drive and presto! It remounted without problems. To whomever mentioned TestDisk, thank you! This 3 year old post saved my bacon :)
 

thekev

macrumors 604
Aug 5, 2010
7,005
3,343
TestDisk figured out the partition info in a few seconds and reconstituted the partition table, I wrote it to the drive and presto! It remounted without problems. To whomever mentioned TestDisk, thank you! This 3 year old post saved my bacon :)

No backup for the Raid1?
 

LordJohnWhorfin

macrumors regular
May 28, 2002
166
37
No backup for the Raid1?

I know, mirror != backup, but these are 3GB drives... If I can't count on the mirror for reliability, then mirroring is pretty much pointless, I might as well use CarbonCopyCloner or SuperDuper to replicate the disk on a daily basis.
 
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