Seagate 4TB repair problem

Using TestDisk to repair the filesystem
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GingerBeard
Posts: 3
Joined: 02 Aug 2016, 06:56

Seagate 4TB repair problem

#1 Post by GingerBeard » 02 Aug 2016, 08:32

Can't repair filesystem and data of Seagate 4TB hard drive ST4000DM000-1F2168
Hard drive installed into Agestar enclosure with USB and Wi-Fi.
Hard drive had 1 partition only. Now I see 3 partitions: 465.75 GB (RAW filesystem), 1582.25 GB and 1678.02 GB
Win-Disk-Info.png
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testdisk (7.0 and 7.1 versions) recommends use "Intel partition table type" - and find table without data. I start deep search, but read speed of deep search about 6MB/sec (I need about half of year to end this search).

Next time I choose "GPT". Quick search took 30 hours. Logfile attached (testdisk-short-log.7z).
Quick search showed full directory structure, but repaired 2 files only (2 complete files and about 40 broken files)
broken-files.png
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Some records from logfile

Code: Select all

Partition table type (auto): Intel
Disk \\.\PhysicalDrive1 - 4000 GB / 3726 GiB
Partition table type: EFI GPT
New options :
 Dump : No
 Align partition: Yes
 Expert mode : No

Interface Advanced
Bad GPT partition, invalid signature.
Trying alternate GPT
Bad GPT partition, invalid signature.

Analyse Disk \\.\PhysicalDrive1 - 4000 GB / 3726 GiB - CHS 486401 255 63
Bad GPT partition, invalid signature.
Trying alternate GPT
Bad GPT partition, invalid signature.
Current partition structure:
Bad GPT partition, invalid signature.
Trying alternate GPT
Bad GPT partition, invalid signature.

search_part()
Disk \\.\PhysicalDrive1 - 4000 GB / 3726 GiB - CHS 486401 255 63
     MS Data                      504  976754809  976754306
     exFAT, blocksize=1048576, 500 GB / 465 GiB

SYSV4 Marker at 76302/170/60

recover_sysv4
     Unknown               1225802399 21438930798 20213128400 [В„Ъщ*]
     SysV4, 10349 GB / 9638 GiB
Partition not added.
check_FAT: Bad number of sectors per cluster
check_FAT: Bad number of sectors per cluster

LVM magic value at 175907/175/3

LVM magic value at 202128/22/33

LVM magic value at 215656/6/36
check_FAT: Bad jump in FAT partition

LVM magic value at 281722/101/58

cramfs Marker at 300462/142/56
Attachments
testdisk-short-log.7z
(2.75 KiB) Downloaded 45 times

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cgrenier
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Re: Seagate 4TB repair problem

#2 Post by cgrenier » 02 Aug 2016, 11:08

Is the size of F: correct ? If it's ok, run "cmd" (right click run as administrator) and "chkdsk /f f:"

GingerBeard
Posts: 3
Joined: 02 Aug 2016, 06:56

Re: Seagate 4TB repair problem

#3 Post by GingerBeard » 02 Aug 2016, 11:57

cgrenier wrote:Is the size of F: correct ? If it's ok, run "cmd" (right click run as administrator) and "chkdsk /f f:"
size of F: is not correct. It must be full disk.

Testdisk show this message "harddisk seems too small" after quick search (30hours)
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a few days later after starting recovery files I still had two recovered files (about 7.7GB) only. And many failed files. Size of logfile was about 17 GB. First records from this large logfile is attached with first post
IMG_0008 (1).JPG
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I try to recovery files via qphotorec_win.exe: 2.12 GB successfully recovered and photorec stop at 75%. How to run photorec to recovery after MBR limit?
IMG_0263.JPG
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P.S. sorry, I could not attach more files with first post and post other information after moderation

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cgrenier
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Re: Seagate 4TB repair problem

#4 Post by cgrenier » 03 Aug 2016, 17:56

Why have you choosed to recover this partition ?
MS Data 16377 7814015992 7813999616
NTFS found using backup sector, blocksize=4096, 4000 GB / 3726 GiB

If you want to save time, you can manually add this partition after Analyse, Quick Search, Stop. Once this partition has been added, set it to P(rimary), choose Write, confirm, go in Advanced, choose Boot, BackupBS, confirm, Quit and restart your computer.

GingerBeard
Posts: 3
Joined: 02 Aug 2016, 06:56

Re: Seagate 4TB repair problem

#5 Post by GingerBeard » 04 Aug 2016, 10:36

cgrenier wrote:Why have you choosed to recover this partition ?
MS Data 16377 7814015992 7813999616
NTFS found using backup sector, blocksize=4096, 4000 GB / 3726 GiB

If you want to save time, you can manually add this partition after Analyse, Quick Search, Stop. Once this partition has been added, set it to P(rimary), choose Write, confirm, go in Advanced, choose Boot, BackupBS, confirm, Quit and restart your computer.
I did these steps. And no data :(
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I repeated these steps for another partition: 16384 7814015999 7813999616
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And nothing. Again :(

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