Data recovery with gddrescue, what's the problem?

Question

Hard disks

Hello. Help please with a problem.
There is a hard drive with Debian. One not very fine day, the system refused to boot, complaining about bad sectors and I \ O errors. Tried to recover data with gddrescue. I restored the whole image, byte by byte
(ddrescue -f -n /dev/hda /dev/hdb mapfile
ddrescue -d -f -r3 /dev/hda /dev/hdb mapfile)
After that, the disk began to be read, I see files and partitions on it , but as a system one it does not work, when loading bios it requires you to connect a disk with the system. As I assume, the MBR has not recovered on the disk. Is there anything that can be done about this, or is everything just for reinstalling and setting up the system on a new one and uploading the saved data?

Answer 1

Fixmbr, fixboot, reinstalling grub and that's all a finger to the sky without details))

Answer 2

UPDATE `goods` SET `update_at` = `create_at` WHERE `update_at` IS NULL