I had a problem under Windows with ndis.sys [sys don't start] Status: 0xc00000e9 Info: Windows failed to load because a critical system driver... To repair I had to fully decrypt drive [encrypted with TrueCrypt]. Encryption was running fine, but at some point it found a bad sector.
At some point it slowed down decryption process significantly. As I was thinking it's a disk problem - I did a search and came across - option to do a full drive backup with Linux dd command. That supposed to give me image of whole HDD drive in case of ongoing corruption and possibility to run decryption from different drive.
What I did so far
sudo mkdir /mnt/usb sudo mount /dev/sdb2 /mnt/usb sudo chmod -R 777 /mnt/usb sudo dd if=/dev/sda of=/mnt/usb/image.dd conv=noerror
The result being
dd: error reading '/dev/sda': Input/output error 254256+0 records in 254256+0 records out
I have just noticed I can do image trough Disks [I work on latest Knoppix DVD], but didn't try it yet. Also I was getting suggestions that I can use dd_rescue, but has heard it is not exactly safe to the data on drive as it over-writes bad blocks? And didn't try it yet.
I'm stuck, please help, I don't have a full backup of latest work from my sys partition, although seems that sda3 / sda5 was fully decrypted.