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Top Forums Shell Programming and Scripting cp to copy only non-corrupt files Post 302583937 by methyl on Wednesday 21st of December 2011 04:42:48 PM
Old 12-21-2011
ckhdisk.exe is a very basic Microsoft program. Unless you run it manually it is triggered by a crude mechanism which decides whether there were incomplete disc writes.

What Operating System did you use to format this disc? Can we assume that this new disc is formatted NTFS rather than basic FAT? If not, it will not be able to deal with large files.
How did you format the disc? Did you run chkdisk.exe on the new disc before using it?

I too am amazed that you have the equipment for a low-level disc format. You will have needed to enter all bad sectors manually.

Because you have posted on unix.com , we must assume that unix is involved somewhere in this process.
Does the source disc belong to the system on which you are trying to do the copy? If not, where did it come from? What is the format of the source disc and what Operating System and software wrote the files on the disc? What proof do you have that the source disc is corrupt? What did you type when trying to copy the files? What error messages do you get? How big is the largest file (especially if bigger than 2 Gb)?
A detailed hardware and software inventory would help. I wonder if you are fitting modern disc drives to an old computer?

Last edited by methyl; 12-21-2011 at 05:50 PM..
 

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scrounge-ntfs(8)					    BSD System Manager's Manual 					  scrounge-ntfs(8)

NAME
scrounge-ntfs -- helps retrieve data from corrupted NTFS partitions SYNOPSIS
scrounge-ntfs -l disk scrounge-ntfs -s disk scrounge-ntfs [-m mftoffset] [-c clustersize] [-o outdir] disk start end DESCRIPTION
scrounge-ntfs is a utility that can rescue data from corrupted NTFS partitions. It writes the files retrieved to another working file system. Certain information about the partition needs to be known in advance. The -l mode is meant to be run in advance of the data corruption, with the output stored away in a file. This allows scrounge-ntfs to recover data reliably. See the 'NOTES' section below for recover info when this isn't the case. OPTIONS
The options are as follows: -c The cluster size (in sectors). When not specified a default of 8 is used. -l List partition information for a drive. This will only work when the partition table for the given drive is intact. -m When recovering data this specifies the location of the MFT from the beginning of the partition (in sectors). If not specified then no directory information can be used, that is, all rescued files will be written to the same directory. -o Directory to put rescued files in. If not specified then files will be placed in the current directory. -s Search disk for partition information. (Not implemented yet). disk The raw device used to access the disk which contains the NTFS partition to rescue files from. eg: '/dev/hdc' start The beginning of the NTFS partition (in sectors). end The end of the NTFS partition (in sectors) NOTES
If you plan on using this program sucessfully you should prepare in advance by storing a copy of the partition information. Use the -l option to do this. Eventually searching for disk partition information will be implemented, which will solve this problem. When only one partition exists on a disk or you want to rescue the first partition there are ways to guess at the sector sizes and MFT loca- tion. See the scrounge-ntfs web page for more info: http://memberwebs.com/swalter/software/scrounge/ AUTHOR
Stef Walter <stef@memberwebs.com> scrounge-ntfs June 1, 2019 scrounge-ntfs
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