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 Post subject: Samsung HD502HJ Recovery
PostPosted: July 2nd, 2018, 7:51 
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Joined: July 2nd, 2018, 7:19
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Location: Ohio the state
At first everything was running normally, but then the computer completely froze up. When it restarted, it gave me an error about a corrupted kernel. So then I tried a startup recovery. After a couple attempts at that I did manage to get into safe mode, then normal mode, but then it started throwing errors and crashed again. I hooked it up as an external to a different computer where it showed up with no file system format, however testdisk was able to read the partition and files but fixing the boot sector and MFT didn't seem to help. SMART gave a warning that Read Error Rate was at worst "1" with a threshold of "51."

Long story short I tried recovering the disk into image files with ddrescue and hddsuperclone. Certain bands of the disk can be copied quickly, but the programs both start slowing down, and once they get over 50% rescued, the estimated time to finished balloons to over 100 days. One person suggested that this happened because one of the two read/write heads has failed.

Opening the unfinished image file in R-Studio does get a good amount of intact files and folder structure, but problems reading parts of the MFT creates a lot of orphaned files and folders, and files that take up space but are just filled with zeros (is there a way to filter these out?)

Any suggestions on how to proceed, or just be thanksful for anything I can get?


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 Post subject: Re: Samsung HD502HJ Recovery
PostPosted: July 2nd, 2018, 8:10 
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Joined: March 2nd, 2014, 23:20
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Location: Australia
It sounds like it's either a weak head but most probably you have bad sectors which are more common on Samsung hard drive as the heads are quite hardy. Pretty much any logical attempt at reading the drive will eventually cause more bad sectors and more defects added to the firmware which will slow down the drive even more. You do need some specialised equipment (PC-3000 or others) to be able to clear the lists and create a translator to avoid your bad sectors (Samsung drives also tend to stall on bad sectors).
But my honest suggestion would be if the data is important to you better get a professional to do it. It is not a DIY job and definitely not something that a software only can handle.

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 Post subject: Re: Samsung HD502HJ Recovery
PostPosted: July 2nd, 2018, 8:44 
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Joined: October 16th, 2013, 13:21
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Location: Brazil
Hi

First, because somebody talked about it a couple days ago and I have observed it also : are you creating the images in a NTFS formatted drive ? There are talk about this getting very slow after some point. Better to image directly to another disk.

Also, connect the disks through SATA. Do not use usb caddies and the like.

Can you post the screenshot of ddrescue or the log of hddsuperclone so that someone can maybe help you better ?


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 Post subject: Re: Samsung HD502HJ Recovery
PostPosted: July 2nd, 2018, 9:28 
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Joined: July 2nd, 2018, 7:19
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Location: Ohio the state
Here are the logfiles, I'll try the direct to disk thing


Attachments:
logfiles.zip [41.77 KiB]
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 Post subject: Re: Samsung HD502HJ Recovery
PostPosted: July 2nd, 2018, 10:52 
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Joined: March 19th, 2015, 15:01
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Location: isreal
post the terminal log


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 Post subject: Re: Samsung HD502HJ Recovery
PostPosted: July 2nd, 2018, 18:01 
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Code:
thebladeroden@thebladeroden /media/thebladeroden/My Passport/Test 4 Files $ sudo ddrescue -f -n -N -P8 /dev/sda1 /dev/sdb1 test4.logfile
GNU ddrescue 1.23
Press Ctrl-C to interrupt
Data preview:
00BF2F0000  FF FF FF FF FF FF FF FF  FF FF FF FF FF FF FF FF  ................
00BF2F0010  FF FF FF FF FF FF FF FF  FF FF FF FF FF FF FF FF  ................
00BF2F0020  FF FF FF FF FF FF FF FF  FF FF FF FF FF FF FF FF  ................
00BF2F0030  FF FF FF FF FF FF FF FF  FF FF FF FF FF FF FF FF  ................
00BF2F0040  FF FF FF FF FF FF FF FF  FF FF FF FF FF FF FF FF  ................
00BF2F0050  FF FF FF FF FF FF FF FF  FF FF FF FF FF FF FF FF  ................
00BF2F0060  FF FF FF FF FF FF FF FF  FF FF FF FF FF FF FF FF  ................
00BF2F0070  FF FF FF FF FF FF FF FF  FF FF FF FF FF FF FF FF  ................

     ipos:    3207 MB, non-trimmed:  163831 kB,  current rate:       0 B/s
     opos:    3207 MB, non-scraped:        0 B,  average rate:   9870 kB/s
non-tried:  234092 MB,  bad-sector:        0 B,    error rate:       0 B/s
  rescued:  265849 MB,   bad areas:        0,        run time:  7h 28m 53s
pct rescued:   53.15%, read errors:     2787,  remaining time:  10888d 18h
                              time since last successful read:          0s
Copying non-tried blocks... Pass 5 (forwards)^C
  Interrupted by user

thebladeroden@thebladeroden /media/thebladeroden/My Passport/Test 4 Files $


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 Post subject: Re: Samsung HD502HJ Recovery
PostPosted: July 2nd, 2018, 18:06 
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Joined: October 16th, 2013, 13:21
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Location: Brazil
Try to run ddrescue on the drives, not partitions, that is, /dev/sda and /dev/sdb in your example.

Also, are both drives directly connected to the sata ports of the pc, or is anyone of them connected through usb ?


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 Post subject: Re: Samsung HD502HJ Recovery
PostPosted: July 2nd, 2018, 18:18 
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Joined: January 29th, 2012, 1:43
Posts: 446
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From the logs it is a bad head. And when originally using ddrescue the head was reading for the very first section of the read per that head, then got much worse. The head is almost dead, possibly reading some data but very slow, not enough to be worth trying further. No hope but a head swap, not something you can do yourself. Time to call a data recovery pro... and hope the head did not cause platter damage.

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 Post subject: Re: Samsung HD502HJ Recovery
PostPosted: July 2nd, 2018, 18:37 
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Joined: January 29th, 2012, 1:43
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maximus wrote:
From the logs it is a bad head. And when originally using ddrescue the head was reading for the very first section of the read per that head, then got much worse. The head is almost dead, possibly reading some data but very slow, not enough to be worth trying further. No hope but a head swap, not something you can do yourself. Time to call a data recovery pro... and hope the head did not cause platter damage.

I would like to make a slight correction. From the logs I can't be sure if the head did degrade because I don't know the story of the ddrescue attempt. The head does appear to be reading, but very slowly and with possible errors. The diagnosis still stands. No solution without head swap, other than to try to read it slowly and hope it doesn't die. The question then becomes how important is the data?

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 Post subject: Re: Samsung HD502HJ Recovery
PostPosted: July 2nd, 2018, 19:05 
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maximus wrote:
The head does appear to be reading, but very slowly and with possible errors.


I would at least disable re-location in RAM and clone with very low timeout to skip the bad sectors first ...

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 Post subject: Re: Samsung HD502HJ Recovery
PostPosted: July 2nd, 2018, 19:06 
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TheBladeRoden wrote:
Any suggestions on how to proceed, or just be thanksful for anything I can get?


If the data is important to you please do consider the use of a professional data recovery firm ...

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 Post subject: Re: Samsung HD502HJ Recovery
PostPosted: July 2nd, 2018, 20:11 
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rogfanther wrote:
Try to run ddrescue on the drives, not partitions, that is, /dev/sda and /dev/sdb in your example.

I missed that completely. I am pretty sure this started in another forum where I responded, but did not catch the original /dev/sda1. There was a second result from hddsuperclone that was /dev/sda, but hddsuperclone will only clone a whole drive and not a partition (unless you specifically choose the generic mode). This absolutely needs to be done as a whole drive and not a partition (sda and NOT sda1).

But that still will not change the outcome. 50% recovery from the good head, and a very long and maybe impossible time to recover the other 50%. And FYI the read size per head is about 15GB.

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 Post subject: Re: Samsung HD502HJ Recovery
PostPosted: July 2nd, 2018, 20:37 
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Joined: October 16th, 2013, 13:21
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Location: Brazil
Agree.

But the OP still hasn´t answered if the drives involved are through SATA or USB. And it seems that his cloning was being made to image files, so one more possible problem.

Since he has the beginning of the disk, could he try to map the important files from the MFT then try to hammer just the relevant sectors to recover them ?


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 Post subject: Re: Samsung HD502HJ Recovery
PostPosted: July 2nd, 2018, 21:00 
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Joined: January 29th, 2012, 1:43
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Technically the OP can read 50% of the disk in about 15GB stripes. Sorry, had to be technical...

As for targeting important files, sure, as long as the MFT can be read. But then the question becomes: What are the important files and how big are they? If the important files are only a few hundred MB total, or maybe even up to a few GB it could be feasible. But not easy. If the important data is many GB then it becomes much more of an issue.

Side note: Damn, I really need to get the pro version up and going...

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 Post subject: Re: Samsung HD502HJ Recovery
PostPosted: July 2nd, 2018, 21:10 
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Re:Side Note, what would be the new function in the Pro version as related to this case ?


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 Post subject: Re: Samsung HD502HJ Recovery
PostPosted: July 2nd, 2018, 21:28 
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Joined: January 29th, 2012, 1:43
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rogfanther wrote:
Re:Side Note, what would be the new function in the Pro version as related to this case ?

The virtual driver mode, where the live recovery is presented to the OS as a generic device. All reads are done through hddsuperclone. Any data already read comes from the destination. So data from the source does not have to be read again. Any Linux program including the OS itself can access the virtual disk for reading. When a program or the OS fails to get the data it needs and aborts, data has still been copied to the destination and therefore does not need to be read again from the source. This means that multiple attempts can be made from software without re-reads of the source for the same data. :D :D :D

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 Post subject: Re: Samsung HD502HJ Recovery
PostPosted: July 2nd, 2018, 21:36 
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Very nice!


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 Post subject: Re: Samsung HD502HJ Recovery
PostPosted: July 2nd, 2018, 21:41 
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rogfanther wrote:
Very nice!


Agree !!!

Also an option to read the file system and copy only the data that is ocupied by actual files would be nice ...

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 Post subject: Re: Samsung HD502HJ Recovery
PostPosted: July 2nd, 2018, 21:52 
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Joined: January 29th, 2012, 1:43
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Spildit wrote:
rogfanther wrote:
Very nice!


Agree !!!

Also an option to read the file system and copy only the data that is ocupied by actual files would be nice ...

Also possible, but let's try not to get too much off topic here (I already did that enough). If any of you want to know how it works, look in the latest manual for hddsuperclone. The manual has the info for the upcoming pro version features, as it is in selective beta testing now.

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 Post subject: Re: Samsung HD502HJ Recovery
PostPosted: July 3rd, 2018, 11:12 
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Joined: July 2nd, 2018, 7:19
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Location: Ohio the state
They were going from a SATA drive to an image file on a USB drive. But since my ordered hard rive arrived, I have been trying direct from SATA drive to SATA drive, though it doesn't seem to be helping much.


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