Wrote the partition table thinking I'd fix it...

How to use TestDisk to recover lost partition
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tomtailford
Posts: 19
Joined: 12 Nov 2015, 21:08

Wrote the partition table thinking I'd fix it...

#1 Post by tomtailford »

UH OH...

I have a GRAID disk (EXFAT striped raid) which was showing up as RAW in windows and asked for a format. On the Mac the device showed, but the single partition didn't - and first aid didn't do anything.

Ran Testdisk and after analysing I could see the partition and all the files

I wrote the partition structure to disk and now I can't access the files (I thought this would fix it, but should have read the manual!)

Now I can't see the files as it says "support for this filesystem hasn't been implemented"

Also, it's saying the filesystem is Mac HFS, but pretty sure I set it up as EXFAT.

Hopefully I've not managed to destroy all my data :(
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cgrenier
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Re: Wrote the partition table thinking I'd fix it...

#2 Post by cgrenier »

If you have the testdisk.log file where TestDisk recorded what you have done, please post it.
If TestDisk has managed to find your exfat partition once, it will find it again.
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tomtailford
Posts: 19
Joined: 12 Nov 2015, 21:08

Re: Wrote the partition table thinking I'd fix it...

#3 Post by tomtailford »

Thanks again for your help!

I was using a mac at the time and there doesn't appear to be a testdisk.log file in the folder where I ran the application from. Any suggestions?

Thanks,

Tom
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whitmell
Posts: 5
Joined: 05 Nov 2015, 05:40

Re: Wrote the partition table thinking I'd fix it...

#4 Post by whitmell »

If you get this resolved, please post here as I have done the same thing and haven't yet found a solution. If I fix mine I will post my solution here.
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cgrenier
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Re: Wrote the partition table thinking I'd fix it...

#5 Post by cgrenier »

Go in testdisk directory, sort the file by date/time, the log file is probably the most recent.
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tomtailford
Posts: 19
Joined: 12 Nov 2015, 21:08

Re: Wrote the partition table thinking I'd fix it...

#6 Post by tomtailford »

Code: Select all


Thu Nov 12 19:59:43 2015
Command line: TestDisk

TestDisk 7.0, Data Recovery Utility, April 2015
Christophe GRENIER <grenier@cgsecurity.org>
http://www.cgsecurity.org
OS: Darwin, kernel 14.3.0 (Darwin Kernel Version 14.3.0: Mon Mar 23 11:59:05 PDT 2015; root:xnu-2782.2
Compiler: GCC 4.0
Compilation date: 2015-04-18T13:01:34
ext2fs lib: 1.42.8, ntfs lib: libntfs-3g, reiserfs lib: 0.3.1-rc8, ewf lib: 20120504, curses lib: ncurses 5.4
Hard disk list
Disk /dev/disk0 - 251 GB / 233 GiB - 490234752 sectors (RO), sector size=512
Disk /dev/disk1 - 8001 GB / 7451 GiB - 15627911168 sectors, sector size=512
Disk /dev/rdisk0 - 251 GB / 233 GiB - 490234752 sectors (RO), sector size=512
Disk /dev/rdisk1 - 8001 GB / 7451 GiB - 15627911168 sectors, sector size=512

Partition table type (auto): EFI GPT
Disk /dev/disk1 - 8001 GB / 7451 GiB
Partition table type: EFI GPT

Analyse Disk /dev/disk1 - 8001 GB / 7451 GiB - 15627911168 sectors
hdr_size=92
hdr_lba_self=1
hdr_lba_alt=15627911167 (expected 15627911167)
hdr_lba_start=34
hdr_lba_end=15627911134
hdr_lba_table=2
hdr_entries=128
hdr_entsz=128
Current partition structure:
 1 P EFI System                    40     409639     409600
 2 P Mac HFS                   409640 15627648983 15627239344

s
search_part()
Disk /dev/rdisk1 - 8001 GB / 7451 GiB - 15627911168 sectors
FAT32 at 40/0/1
check_FAT: Unusual media descriptor (0xf0!=0xf8)
FAT1 : 32-3182
FAT2 : 3183-6333
start_rootdir : 6334 root cluster : 2
Data : 6334-409599
sectors : 409600
cluster_size : 1
no_of_cluster : 403266 (2 - 403267)
fat_length 3151 calculated 3151
heads/cylinder 16 (FAT) != 1 (HD)
sect/track 32 (FAT) != 1 (HD)

FAT32 at 40/0/1
     EFI System                    40     409639     409600 [EFI]
     FAT32, blocksize=512, 209 MB / 200 MiB

HFS+ magic value at 409640/0/1

HFS+ magic value at 409640/0/1
part_size 2742337456
     Mac HFS                   409640 15627648983 15627239344
     HFS+ blocksize=8192 + Backup, 8001 GB / 7451 GiB

Results
   P EFI System                    40     409639     409600 [EFI]
     FAT32, blocksize=512, 209 MB / 200 MiB
   P Mac HFS                   409640 15627648983 15627239344
     HFS+ blocksize=8192 + Backup, 8001 GB / 7451 GiB

   P Mac HFS                   409640 15627648983 15627239344
     HFS+ blocksize=8192 + Backup, 8001 GB / 7451 GiB
Support for this filesystem hasn't been implemented.
gpt_change_part_type
Change partition type:
   P Mac HFS                   409640 15627648983 15627239344
     HFS+ blocksize=8192 + Backup, 8001 GB / 7451 GiB
     40     409639     409600
 2 P Unknown                   411648 2743007231 2742595584
Invalid partition structure.

Analyse Disk /dev/disk1 - 8001 GB / 7451 GiB - 15627911168 sectors
hdr_size=92
hdr_lba_self=1
hdr_lba_alt=15627911167 (expected 15627911167)
hdr_lba_start=34
hdr_lba_end=15627911134
hdr_lba_table=2
hdr_entries=128
hdr_entsz=128
Current partition structure:
 1 P EFI System                    40     409639     409600
 2 P Mac HFS                   409640 15627648983 15627239344

search_part()
Disk /dev/disk1 - 8001 GB / 7451 GiB - 15627911168 sectors
FAT32 at 40/0/1
check_FAT: Unusual media descriptor (0xf0!=0xf8)
FAT1 : 32-3182
FAT2 : 3183-6333
start_rootdir : 6334 root cluster : 2
Data : 6334-409599
sectors : 409600
cluster_size : 1
no_of_cluster : 403266 (2 - 403267)
fat_length 3151 calculated 3151
heads/cylinder 16 (FAT) != 1 (HD)
sect/track 32 (FAT) != 1 (HD)

FAT32 at 40/0/1
     EFI System                    40     409639     409600 [EFI]
     FAT32, blocksize=512, 209 MB / 200 MiB

HFS+ magic value at 409640/0/1

HFS+ magic value at 409640/0/1
part_size 2742337456
     Mac HFS                   409640 15627648983 15627239344
     HFS+ blocksize=8192 + Backup, 8001 GB / 7451 GiB

Results
   P EFI System                    40     409639     409600 [EFI]
     FAT32, blocksize=512, 209 MB / 200 MiB
   P Mac HFS                   409640 15627648983 15627239344
     HFS+ blocksize=8192 + Backup, 8001 GB / 7451 GiB
interface_load
Disk /dev/disk1 - 8001 GB / 7451 GiB - 15627911168 sectors Thu Nov 12 19:31:44 2015
 1 P Unknown                       40     409639     409600
 2 P Unknown                   411648 2743007231 2742595584
Disk /dev/disk1 - 8001 GB / 7451 GiB - 15627911168 sectors Thu Nov 12 19:47:46 2015
 1 P Unknown                       40     409639     409600
 2 P Unknow
search_part()
Disk /dev/disk1 - 8001 GB / 7451 GiB - 15627911168 sectors
FAT32 at 40/0/1
check_FAT: Unusual media descriptor (0xf0!=0xf8)
FAT1 : 32-3182
FAT2 : 3183-6333
start_rootdir : 6334 root cluster : 2
Data : 6334-409599
sectors : 409600
cluster_size : 1
no_of_cluster : 403266 (2 - 403267)
fat_length 3151 calculated 3151
heads/cylinder 16 (FAT) != 1 (HD)
sect/track 32 (FAT) != 1 (HD)

FAT32 at 40/0/1
     EFI System                    40     409639     409600 [EFI]
     FAT32, blocksize=512, 209 MB / 200 MiB
FAT32 at 46/0/1
check_FAT: Unusual media descriptor (0xf0!=0xf8)
FAT1 : 32-3182
FAT2 : 3183-6333
start_rootdir : 6334 root cluster : 2
Data : 6334-409599
sectors : 409600
cluster_size : 1
no_of_cluster : 403266 (2 - 403267)
fat_length 3151 calculated 3151
heads/cylinder 16 (FAT) != 1 (HD)
sect/track 32 (FAT) != 1 (HD)
set_FAT_info: name from BS used

FAT32 at 46/0/1
     EFI System                    46     409645     409600 [EFI]
     FAT32, blocksize=512, 209 MB / 200 MiB
NTFS at 264192/0/1
heads/cylinder 255 (NTFS) != 1 (HD)
sect/track 63 (NTFS) != 1 (HD)
filesystem size           2048000
sectors_per_cluster       8
mft_lcn                   85333
mftmirr_lcn               2
clusters_per_mft_record   -10
clusters_per_index_record 1
NTFS part_offset=135266304, part_size=1048576000, sector_size=512
NTFS partition cannot be added (part_offset<part_size).
NTFS at 264192/0/1
heads/cylinder 255 (NTFS) != 1 (HD)
sect/track 63 (NTFS) != 1 (HD)
filesystem size           2048000
sectors_per_cluster       8
mft_lcn                   85333
mftmirr_lcn               2
clusters_per_mft_record   -10
clusters_per_index_record 1
     MS Data                   264192    2312191    2048000
     NTFS, blocksize=4096, 1048 MB / 1000 MiB

HFS+ magic value at 409640/0/1

HFS+ magic value at 409640/0/1
part_size 2742337456
     Mac HFS                   409640 15627648983 15627239344
     HFS+ blocksize=8192 + Backup, 8001 GB / 7451 GiB

HFS+ magic value at 409642/0/1
     MS Data                   411648 15627909119 15627497472
     exFAT, blocksize=262144, 8001 GB / 7451 GiB
     MS Data                   411660 15627909131 15627497472
     exFAT, blocksize=262144, 8001 GB / 7451 GiB
     MS Data                   411660 15627909131 15627497472
     exFAT, blocksize=262144, 8001 GB / 7451 GiB
Search for partition aborted

Results
     EFI System                    40     409639     409600 [EFI]
     FAT32, blocksize=512, 209 MB / 200 MiB
     EFI System                    46     409645     409600 [EFI]
     FAT32, blocksize=512, 209 MB / 200 MiB
     MS Data                   264192    2312191    2048000
     NTFS, blocksize=4096, 1048 MB / 1000 MiB
     Mac HFS                   409640 15627648983 15627239344
     HFS+ blocksize=8192 + Backup, 8001 GB / 7451 GiB
     MS Data                   411648 15627909119 15627497472
     exFAT, blocksize=262144, 8001 GB / 7451 GiB
     MS Data                   411660 15627909131 15627497472
     exFAT, blocksize=262144, 8001 GB / 7451 GiB
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tomtailford
Posts: 19
Joined: 12 Nov 2015, 21:08

Re: Wrote the partition table thinking I'd fix it...

#7 Post by tomtailford »

Does this log help at all?

Just wondering if I have any chance of recovering my files?

Test disk did show me my files before I screwed it up somehow!

Thanks,

Tom
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Fiona
Posts: 2835
Joined: 18 Feb 2012, 17:19
Location: Ludwigsburg/Stuttgart - Germany

Re: Wrote the partition table thinking I'd fix it...

#8 Post by Fiona »

I'm not as much an Apple tech savvy.
But as far as I know, TestDisk can't list files of a HFS+-partition.
Currently you have a an HFS+-partition in your partition table.
Current partition structure:
1 P EFI System 40 409639 409600
2 P Mac HFS 409640 15627648983 15627239344

Did you already search for your EXFAT-Partition again?

Fiona
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tomtailford
Posts: 19
Joined: 12 Nov 2015, 21:08

Re: Wrote the partition table thinking I'd fix it...

#9 Post by tomtailford »

Testdisk sees disk, I choose EFI GPT partition table type, Analyse, Quick Search:
Quick search result
Quick search result
image1.PNG (49.67 KiB) Viewed 4799 times


Now conducting a deeper search... I have a feeling it didn't let me do this before?
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tomtailford
Posts: 19
Joined: 12 Nov 2015, 21:08

Re: Wrote the partition table thinking I'd fix it...

#10 Post by tomtailford »

Fingers crossed it will find something...
image2.PNG
image2.PNG (64.04 KiB) Viewed 4798 times
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