I was doing my monthly HD swap on the server, and had used the How to setup up software RAID1 on a running LVM system guide. When I shut the server down, switched HD's it seems as though I lost the boot sector on the /dev/md0. The only way I can get the system to boot is by using the drive from another server as boot, then all the OS and data is loaded off of the secondary HD. What I need to do is get the boot data back to md0 and copy it to /dev/sdb without losing the data in md1. Would I just go through the steps in the guide for md0? I can put in the last changed out drive, but I don't want to lose that data, or have my working backup be lost.