Ramdisk method to backup Iphone 4 data, Error, GetMasterBlock: Error 16 opening /dev/md0

[GoogleCodeExporter]

What steps will reproduce the problem?
1. After suing putty program to get access to iphone files
2. Error seen in this log http://pastie.org/2619662
3. GetMasterBlock: Error 16 opening /dev/md0 (when trying to do the / moount 
command


Iphone 4
4.3.2
Windows xp

I can't save the data because it won't let me mount the drive. Any help would 
be apprecaited asap.

Original issue reported on code.google.com by ja...@burtmanindustries.com on 1 Oct 2011 at 12:22

[GoogleCodeExporter]

Hi, the error "GetMasterBlock: Error 16 opening /dev/md0" is a "normal error".
If the command "mount_hfs /dev/disk0s2s1 /mnt2" gives no errors, then the data 
partition should be accessible in /mnt2. Does "ls /mnt2" lists any folder ?

Original comment by jean.sig...@gmail.com on 1 Oct 2011 at 9:51

• Changed state: Accepted

[GoogleCodeExporter]

Yes it does! Thanks so much, everything seems to be there that I need. I'm 
using WinSCP to get the files, but when getting photos it freezes my computer. 
What other programs might work better so it doesn't freeze?

Also, I never had my ssh saved. I used ifaith 1.3.2, and it was able to export 
my 4.3.2 blob correctly, but when I try to create the custom ipsw, when it gets 
halfway done it gives a xpwntool.exe failed to initialize properly. Driving me 
nuts. SO I have the shsh blobs from Ifaith 1.3.2, but can't seem to build the 
ipsw before it crashes. DOn't know what else to do. Could I try to use the blob 
created by ifaith 1.3.2 and install an older version of ifath and try with the 
blob created by the latest version? The blob should be the same? Also, don't 
know if that blob can be used with other methods to do the ipsw with no errors 
in itunes.

Then I found this below. Would this work and be safer?

http://msftguy.blogspot.com/2010/07/data-recovery-not-just-for-iboot-pwned.html

It says "Usage:
Use current firmware version that is still being signed by Apple (4.1 ATM)!
"
I'm on 4.3.2, does this mean I can use this?

I'm new at this and am learning. I also don't now the order of steps to do this 
on my jailbroken phone. At what stage do I restore my phone from my apple 
backup? Do the custom ipsw first, then rejailbreak? Then restore from apple 
backup?

Is there a way we can chat on IRC.

Original comment by ja...@burtmanindustries.com on 1 Oct 2011 at 4:53

[GoogleCodeExporter]

Original comment by jean.sig...@gmail.com on 6 Oct 2011 at 6:54

• Changed state: Done

[GoogleCodeExporter]

same issue here using ios 6.1.3.

i have the "GetMasterBlock: Error 16 opening /dev/md0"

disks fail to mount and i cant seem to find them in /dev - also nothing in mnt1 
or mnt2

help!

Original comment by jdigi...@gmail.com on 14 Aug 2013 at 5:33

[GoogleCodeExporter]

additionally, when i run the mount command, i get:

GetMasterBlock: Error 2 opening /dev/rdisk0s2s1
GetMasterBlock: Error 2 opening /dev/rdisk0s2s1
mount_hfs: No such file or directory

Original comment by jdigi...@gmail.com on 14 Aug 2013 at 5:57

[GoogleCodeExporter]

"fixed" via python ios_examiner.py then running bruteforce at the prompt

Original comment by jdigi...@gmail.com on 15 Aug 2013 at 11:15