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Dear Spartacus, is it using a polishing tool to refurbish the scratched parts and then recover from the good parts? It was a small scratch on the outer rim of the HDD. What % of data is usually recoverable in this case?The data in the damaged part of the platter may be unrecoverable, but a good data recovery specialist
will still be able to recover data from the drive.
.
Dea
Dear Spartacus, is it using a polishing tool to refurbish the scratched parts and then recover from the good parts? It was a small scratch on the outer rim of the HDD. What % of data is usually recoverable in this case?
Other way round.Most hard drive write from the inside of the platter out, so likely very little data on the edge of the platter.
Other way round.
The outer of the platter has the fastest data transfer rate due to the higher platter speed.
When you perform a data transfer test the start of the test (lowest sector number) is always the fastest, this is where data is written first.
Near the first free sectors.where will the system area (critical area) of the HDD be stored at? I am hoping that wont be the area that is scratched
Since data is written to the outer tracks of a drive first, hence the drive is filled with data from the outside in.
Near the first free sectors.
If the drive was empty, it should be close to the outer edge.
http://www.dewassoc.com/kbase/hard_drives/hard_disk_sector_structures.htm
Thats not what I meant.
When the OS was installed, if the drive was empty, the system files will be on the outer edge of the drive.
Although I'm not sure why you think the system area is important for file recovery.
wouldn't it make the entire drive unrecoverable?
They access the drive using recovery hardware and software (if they are any good).If the system area is scratched or corrupted, wouldn't it make the entire drive unrecoverable? Or would it not?
Yeah, it's normal.
Edit: It has to retry bad sectors over and over and over
and over
You kept using it after the first time? You must have some big onesI recovered a Spinpoint F3 twice using the freezer trick. This second and last time, I moved everything off of it
You kept using it after the first time? You must have some big ones
May I know if there is a chance that it is unrecoverable?
Probably due to the scratch being on crucial system area?
Currently the hdd is about 75% imaged and will likely take another week or so. I am also concerned about my video files, mostly around 1-2gb large. May I know if there is a chance that it is unrecoverable? Probably due to the scratch being on crucial system area?
There is never a chance of it going bad. There is a risk though.
Chance = probability of something good
Risk = probability for something bad
Anyway I'm curios what did you do to get access to make an image of the drive ?
It is very strange and i am terribly upset after losing all my treasured family photos. Why..
after a successful imaging, is there a chance that the data is unreadable due to system area damage?
Are there any algorithms or software that can decipher it?
Yes some of the data can be unreadable due to system area damage. Some of the data can also be unreadable due to file corruption (files that occupied the sectors with physical damage).
Yes there exists software to try to recover from corrupt filesystems and corrupt files. I recommend you do all of your recovery from an image of the disk. Also make sure you take at least a second image so you have a backup of the image. This will be of great help if any of the software corrupts the data further. Also having more than 1 image allows you to use more than 1 recovery application. Perhaps 1 recovery program deals with 1 type of corruption better than a second program.
What are the chances of a good recovery with software?
what do you suggest spartacus?