Apple Event: May 7th at 7 am PT

Looks like no one’s replied in a while. To start the conversation again, simply ask a new question.

Level 1

0 points

Bootcamp corrupted by 10.7.5 update

Hello everyone,

I ran some updates on an old Lion installation on a 2011 iMac that had been running windows on bootcamp for a few years. Now the bootcamp partition seems to be corrupted, unable to boot windows or see the partition.

running fdisk /dev/disk0:

sphccs-imac:Users root# fdisk /dev/disk0

Disk: /dev/disk0 geometry: 60801/255/63 [976773168 sectors]

Signature: 0xAA55

Starting Ending

#: id cyl hd sec - cyl hd sec [ start - size]

------------------------------------------------------------------------

1: EE 0 0 2 - 25 127 14 [ 1 - 409639] <Unknown ID>

2: 07 25 127 15 - 1023 254 63 [ 409640 - 29296872] HPFS/QNX/AUX

3: AB 1023 254 63 - 1023 254 63 [ 29706512 - 1269536] Darwin Boot

*4: 07 1023 254 63 - 1023 254 63 [ 30978048 - 945795072] HPFS/QNX/AUX

running gpt -vv -r show /dev/disk0:

sphccs-imac:Users root# gpt -vv -r show /dev/disk0

gpt show: /dev/disk0: mediasize=500107862016; sectorsize=512; blocks=976773168

gpt show: /dev/disk0: Suspicious MBR at sector 0

gpt show: /dev/disk0: Pri GPT at sector 1

gpt show: error: bogus map

gpt show: unable to open device '/dev/disk0': Undefined error: 0

sphccs-imac:Users root#

output from test disk:

The MS Data entries all look too small, the lost partition is around 460 Gb.

Do you have any idea if the bootcamp partition could be one of these entries?

iMac, Mac OS X (10.7.5)

Posted on Jun 15, 2015 5:20 PM

48 replies

Cohuu Author

Level 1

0 points

Jun 29, 2015 4:43 PM in response to Loner T

Thanks Loner. Unfortunately terminal crashed while I was copying the entries, so I can only access the truncated list, missing a lot of the initial entries. Here is the dropbox link to these: https://www.dropbox.com/s/5laga0buupwymsz/NTFS%20refs.rtf?dl=0

Losing that bootcamp partition might not be a big problem after all, I now understand there might not be too much important data on it, it might not be worth spending more time on. I will be traveling for the next 2 weeks.

Thanks again for all your help!

Loner T

Level 9

59,471 points

Jun 29, 2015 5:05 PM in response to Cohuu

This one or similar ones are what we need.

00000000 eb 52 90 4e 54 46 53 20 20 20 20 00 00 0

0 00 00 |.R.NTFS .....|

106953206

We can take it up when you get back.

Cohuu Author

Level 1

0 points

Jun 29, 2015 5:15 PM in response to Loner T

OK, if its necessary to continue recovery of the partition, I will rerun the search when I get back, else I will repartition and reinstall it as a dual boot system. Thanks!

Bootcamp corrupted by 10.7.5 update