After doing a
convert C: /fs:ntfs
the MBR is damaged that way it didn't find anything on the disk, even ntld( no message at all after reboot).
After connecting the disk as second drive, I can access all files on all partitions. So I'm pretty shure that the FS and the partition table is ok. NT's and Linux's fdisk show the right partition table, while dskprobe shows useless data.
ERD didn't reinstall a valid MBR too.
How can I get (and store) a valid MBR on this disk?
This course will help prep you to earn the CompTIA Healthcare IT Technician certification showing that you have the knowledge and skills needed to succeed in installing, managing, and troubleshooting IT systems in medical and clinical settings.