I have been using my Centos server for a couple of years now without any serious problem. Three days I had to restart the server, booting stopped at grub. Searching the internet I did try to resolve this with linux rescue. With no result. Momentary the os is 5.11 I have got a software raid system with the os in raid 1 on two disks and my data in raid 5 on four disks. Using parted magic the disks seems to be ok. The strange thing I noticed was dat md0 (with grub) exists on sde and sdf, md1 md2 and md3 (the other devices in raid 1) are empty instead there are dm-1 dm-2 dm-3. The data md126 (raid 5) became dm-0. Looking at the dm-devices all the files seems to be there. Now my my question: is it possible to repair the raid devices with linux rescue and how? Three days of searching didn't resolve my problem and I need the server for my work. Thank you in advance, Ad.