I created an image of a failing drive with:
dd if=/dev/sde of=/mnt/image001.dd
The drive had only two partitions:
Device Boot Start End Blocks Id System
/dev/sde1 * 1 13 102400 7 HPFS/NTFS
/dev/sde2 13 60802 488282112 7 HPFS/NTFS
How can I split the image (image001.dd) into two or three files (1: MBR; 2: Partition 1; 3: Partition 2) so that I can mount the filesystems in it?
A solution I've found that wouldn't work for me is to use split to create many 512K files, then cat them back together into three files (1: 512K, 2: 105M, 3: the rest), but I don't have the disk space for that.
History:
I have already copied the entire image to a new drive, and it boots and mostly works. It seems that the FS was corrupted on the old failing drive, and dd copied the corrupted parts (as it should), and I wrote them to the new drive. My solution is to mount the FS that I copied and the copy just the files (using rsync or something) so that hopefully I won't copy the bad bits.
UPDATE 1: I've tried dd if=/mnt/image001.dd of=/mnt/image001.part1.dd bs=512 count=204800 skip=1 but mount complains that NTFS signature is missing, so I think I didn't do it right.