Mac OSX Lion - Disk Utility Restore Gone Bad

How to use TestDisk to recover lost partition
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webletto
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Joined: 25 Jun 2012, 04:06

Mac OSX Lion - Disk Utility Restore Gone Bad

#1 Postby webletto » 25 Jun 2012, 04:18

In a pickle. Made a few bad choices, and am in need of assistance. Goal was to migrate data from a 320GB drive to a new 750GB drive. looked up online, got advice to use Disk Utility (within Lions Recovery mode) to "Restore" data from the old drive to the new one. Only problem was the I chose the the source/destination fields incorrectly. So the 750 GB blank drive was copied to the 320 GB drive - which had all my data on it. yikes! i quickly clicked cancel but the damage was done. The drive was replaced by the blank disk... ugghh!

The Lion recovery partition is still there, but the 320 GB hard drive main partition was formatted. Trying to use TestDisk to recover the data, but having a few hiccups.

Running TestDisk on my other MacBook Pro, with the 320GB drive attached via firewire hd dock. Was able to start up the program as admin/sudo, but next screen said i didn't have permission to write/change the disk, even after i unmounted the disk via Disk Utility.

It's now running a Deep Scan, and at 04%, running very slowly. Any advice? The format took only a split second, so i'm hopeful that the data is still sitting there, but the partition data has been obviously been deleted.

Sincerely, Eric

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webletto
Posts: 5
Joined: 25 Jun 2012, 04:06

Re: Mac OSX Lion - Disk Utility Restore Gone Bad

#2 Postby webletto » 25 Jun 2012, 10:20

Deep Scan Just finished I think, but it still says 50%...

Disk /dev/rdisk1 - 320 GB / 298 GiB - CHS 625142448 1 1 (RO)
Analyse cylinder 312770560/625142447: 50%


Warning: number of sectors per track mismatches 32 (FAT) != 1 (HD)
MS Data 171500380 171510619 10240 [IPODRESOURC]
check_FAT: Unusual media descriptor (0xf0!=0xf8)
check_FAT: Bad number of entries in root dir
check_FAT: Unusual media descriptor (0xf0!=0xf8)
Warning: number of heads/cylinder mismatches 16 (FAT) != 1 (HD)
Warning: number of sectors per track mismatches 32 (FAT) != 1 (HD)
MS Data 171523615 171556382 32768 [IPODRESOURC]
check_FAT: Unusual media descriptor (0xf0!=0xf8)
check_FAT: Bad number of entries in root dir
Mac HFS 178764819 1722771537 1544006719 [ c]
Unknown 215531657 1870260529288 1870044997632 [j6 $]
Mac HFS 308214224 308224383 10160
Mac HFS 308204068 308214227 10160
Mac HFS 308218236 308228395 10160
Mac HFS 308208080 308218239 10160

webletto
Posts: 5
Joined: 25 Jun 2012, 04:06

Re: Mac OSX Lion - Disk Utility Restore Gone Bad

#3 Postby webletto » 25 Jun 2012, 18:38

Ok.. it finally finished the Deep Scan - - here's the report...

Disk /dev/rdisk1 - 320 GB / 298 GiB - CHS 625142448 1 1 (RO)

The harddisk (320 GB / 298 GiB) seems too small! (< 882 GB / 821 GiB)
Check the harddisk size: HD jumpers settings, BIOS detection...

The following partitions can't be recovered:
Partition Start End Size in sectors
> Mac HFS 178764819 1722771537 1544006719 [ c]
Mac HFS 623872868 1247336099 623463232
Mac HFS 623873007 625142542 1269536
Mac HFS 623873152 625142687 1269536
Mac HFS 623873281 625142816 1269536
Mac HFS 623873346 625142881 1269536
Mac HFS 623873435 625142970 1269536
Mac HFS 623873500 625143035 1269536
Mac HFS 623873589 625143124 1269536
Mac HFS 623873654 625143189 1269536
Mac HFS 623873743 625143278 1269536
Mac HFS 623873808 625143343 1269536
Mac HFS 623873897 625143432 1269536
Mac HFS 625142404 626411939 1269536

>D EFI System 40 409639 409600 [EFI]
D EFI System 46 409645 409600 [EFI]
D Mac HFS 409640 623872871 623463232
D Mac HFS 428783 623892014 623463232
>D Mac HFS 428848 623892079 623463232
D Mac HFS 428913 623892144 623463232
D Mac HFS 428978 623892209 623463232
D Mac HFS 429043 623892274 623463232
D Mac HFS 429196 623892427 623463232
D Mac HFS 429509 623892740 623463232
D Mac HFS 429606 623892837 623463232
D Mac HFS 429807 623893038 623463232
D Mac HFS 430024 623893255 623463232
D Mac HFS 430161 623893392 623463232
D Mac HFS 430250 623893481 623463232
D Mac HFS 430427 623893658 623463232
D Mac HFS 430508 623893739 623463232
D Mac HFS 430757 623893988 623463232
>D Mac HFS 430902 623894133 623463232
D Mac HFS 431111 623894342 623463232
D Mac HFS 431240 623894471 623463232
D Mac HFS 431329 623894560 623463232
D Mac HFS 431394 623894625 623463232
D Mac HFS 431587 623894818 623463232
D Mac HFS 431676 623894907 623463232
D Mac HFS 431789 623895020 623463232
D Mac HFS 157196715 157224274 27560
D Mac HFS 157196780 157224339 27560
D Mac HFS 157196781 157224340 27560
D Mac HFS 157199252 157224211 24960
D Mac HFS 157222130 157247089 24960
D Mac HFS 157224208 157249167 24960
>D Mac HFS 157224271 157251830 27560
D Mac HFS 157224336 157251895 27560
D Mac HFS 157224337 157251896 27560
D Mac HFS 157244970 157250803 5834 [IT8 Calibration Data CD]
D Mac HFS 157247086 157272045 24960
D Mac HFS 157250800 157256633 5834 [IT8 Calibration Data CD]
D Mac HFS 157256630 157262463 5834 [IT8 Calibration Data CD]
D MS Data 171288244 171298483 10240 [IPODRESOURC]
D MS Data 171395128 171405367 10240 [IPODRESOURC]
D MS Data 171500380 171510619 10240 [IPODRESOURC]
D MS Data 171523615 171556382 32768 [IPODRESOURC]
D Mac HFS 308204068 308214227 10160
D Mac HFS 308208080 308218239 10160
D Mac HFS 308214224 308224383 10160
D Mac HFS 308218236 308228395 10160
D Mac HFS 622603340 623872875 1269536
D Mac HFS 622603475 623873010 1269536
D Mac HFS 622603620 623873155 1269536
D Mac HFS 622603749 623873284 1269536
D Mac HFS 622603814 623873349 1269536
D Mac HFS 622603903 623873438 1269536
D Mac HFS 622603968 623873503 1269536
D Mac HFS 622604057 623873592 1269536
D Mac HFS 622604122 623873657 1269536
D Mac HFS 622604211 623873746 1269536
D Mac HFS 622604276 623873811 1269536
D Mac HFS 622604365 623873900 1269536
>D Mac HFS 623872872 625142407 1269536
Structure: Ok. Use Up/Down Arrow keys to select partition.
Use Left/Right Arrow keys to CHANGE partition characteristics:
P=Primary D=Deleted
Keys A: add partition, L: load backup, T: change type,
Enter: to continue
HFS+ blocksize=4096, 650 MB / 619 MiB


is there anything i can do to recover the formatted partition? any help would be very appreciated, thank you!

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Fiona
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Re: Mac OSX Lion - Disk Utility Restore Gone Bad

#4 Postby Fiona » 25 Jun 2012, 20:24

What file system or partition type did you try to copy?
HFS+, FAT32 or NTFS?
Might be possible that your partition data is 750 GB instead of 320 GB.
Did your partition have a label like [IT8 Calibration Data CD] or [IPODRESOURC]?

Fiona

webletto
Posts: 5
Joined: 25 Jun 2012, 04:06

Re: Mac OSX Lion - Disk Utility Restore Gone Bad

#5 Postby webletto » 25 Jun 2012, 21:01

Ok, the new bigger drive that i was trying to migrate to was a brand new Seagate Momentus 750GB. I did format it via Disk Utility first, standard default Mac OS Extended Journaled. The biggest mistake was that i named it "Macintosh HD", the same as the old one, so it was too easy to mix it up w/ the drive that had all the data on it.

The original drive i'm guessing had the same format type, standard Apple fair. it's a MacBook pro 15", running Lion. Is it possible to restore back to the way it was, or do i have to run a recovery software and get individual files. Thanks for the advice!

So yes, when i did the "restore" and mistakenly told it to restore to the wrong drive. the 750 blank drive was copied to the 320GB Drive.

So to answer your questions

What file system or partition type did you try to copy?
Partition type was HFS+

Might be possible that your partition data is 750 GB instead of 320 GB.
Performed Restore by accident via Disk utility from 750gb on a 320gb drive

Did your partition have a label like [IT8 Calibration Data CD] or [IPODRESOURC]?
did some research, the IT8 Calibration is from my scanner, for whatever reason, that name is the software to calibrate a Microtek scanner. The IPODRESOURC is some kind of resource for an apple ipod, i see that other users of the software have come across this partition name...

-Eric

webletto
Posts: 5
Joined: 25 Jun 2012, 04:06

Re: Mac OSX Lion - Disk Utility Restore Gone Bad

#6 Postby webletto » 27 Jun 2012, 12:28

any advice with how to proceed to save the partition? is it possible to fix with TestDisk?

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Re: Mac OSX Lion - Disk Utility Restore Gone Bad

#7 Postby cgrenier » 29 Jul 2012, 13:42

Try to set the following two partitions to P(rimary)
P EFI System 40 409639 409600 [EFI]
P Mac HFS 409640 623872871 623463232
On next screen, choose Write, confirm, Quit and restart your computer.


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