• Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 768
  • Last Modified:

Rawcopy yields unreadable drive

Downloaded  raw copy from roadkil.net.  Ran a copy from a drive that is having some corruption errors.  The copy took around 3 hours and completed with no errors.  When we try to explore the drive it copied to the following error appears: “f:\ is not accessible.  The file or directory is corrupted and unreadable.”  Do we have a backup?  We want to run chkdsk but are concerned about running it with no reliable backup.  

Crystal Dlisk Info reports the source drive as healthy.
0
dovidf
Asked:
dovidf
4 Solutions
 
David Johnson, CD, MVPOwnerCommented:
suggest you use a boot disk /cd and then run rawcopy from it to copy the disks
What is your operating system?
You could run a chdkdsk on f: (your destination drive?)
I don't think you have a reliable backup
0
 
Davis McCarnOwnerCommented:
After using Rawcopy, you must reboot before the clone will be read correctly as Windoze keeps the filesystem cached after mounting the device.
0
 
DavidPresidentCommented:
Very understandable.  The source disk took so long because it had to do major error recovery.   The source disk NEEDS TO BE REPLACED (assuming you didn't already know that).   Also raw copy does not handle unrecoverable read errors properly.  A pro would never use this because it won't tell you what blocks were unrecoverable and won't give you a map so you can do manual reconstruction.  

You can just run diskpart then the rescan option instead of rebooting.  Unfortunately you will end up with a disk drive and there will be corrupted data files and really no way to detect what files have blocks of zeros in them when before it had live data.   If you run a chkdsk then you can make things worse because windows will go under the assumption that those blocks with zeros in them that were not recoverable actually are supposed to have zeros in them.

You used the wrong tool for the job, but the good ones cost money.  But this is better then nothing, I suppose.  Just move forward and assume that you can't trust any file to be 100%.
0
Improve Your Query Performance Tuning

In this FREE six-day email course, you'll learn from Janis Griffin, Database Performance Evangelist. She'll teach 12 steps that you can use to optimize your queries as much as possible and see measurable results in your work. Get started today!

 
Davis McCarnOwnerCommented:
Generally, I use WinHex to clone drives as it lists bad sectors to a text file and puts $ BAD SECTOR $ in those sectors on the destination which allows me to find any corrupted files using xSearch; but, I have also used RawCopy when the drive hangs near the beginning and love it's option to start from the end!
Your statement that RawCopy completed with no errors tells me there were no bad sectors; but, again, you will not be able to read the destination filesystem correctly until after a volume dismount.
I always reboot after a cloning;but, you can try unmounting and then remounting the copy in Disk Management if that is not feasable: http://windows.microsoft.com/en-US/windows-vista/Mount-or-dismount-a-drive
0
 
dovidfCEOAuthor Commented:
ve3ofa,

Why would booting from an external cd be better? Perhaps because of corruption on the regular drive?

Rebooting did not help to make the external drive readable.

There still seem to be errors on the source drive after a chkdsk /r. Perhaps Reimage should be used to recover any damaged system files.
0
 
Davis McCarnOwnerCommented:
RawCopy works best if you choose the physical drives for the clone; but, there are a few caveats.  One is that they have a similar translation for LBA, meaning that some drives translate to 240 heads rather than 256 and/or you need to be careful about crossing a storage barrier (if the original is under 127GB, the destination must be, too).
CHKDSK /R should never be run on a suspect drive.  If it is failing, it will be a hundredfold worse afterwards!  Instead, use the free version of http://www.hdtune.com and the error scan tab to read the entire disk.  Even one red box means trouble.
Is this also the boot drive?
If so, what O/S?
what is the make and model of the drive?
0
 
David Johnson, CD, MVPOwnerCommented:
I'd use either acronis disk director or Paragon Hard Disk Manager .. the trials will work to copy the drives.
Or image the drives using one of the 2 above software vendors imaging products
0
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

Join & Write a Comment

Featured Post

Free Tool: Site Down Detector

Helpful to verify reports of your own downtime, or to double check a downed website you are trying to access.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Tackle projects and never again get stuck behind a technical roadblock.
Join Now