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.
Try this (I suppose you talk about /dev/md0 and /dev/sdb1): Code: mdadm --manage /dev/md0 --fail /dev/sdb1 mdadm --manage /dev/md0 --remove /dev/sdb1 mdadm --zero-superblock /dev/sdb1 mdadm -a /dev/md0 /dev/sdb1 Wait until the synchronization has finished. Then run Code: grub and install the bootloader on both HDDs: Code: root (hd0,0) setup (hd0) root (hd1,0) setup (hd1) quit (Taken from http://www.howtoforge.com/how-to-se...ystem-incl-grub-configuration-debian-lenny-p4 .)
For grub2, replace Code: root (hd0,0) setup (hd0) root (hd1,0) setup (hd1) quit with Code: grub-install /dev/sda grub-install /dev/sdb
Tried this, went to trying booting after moving the b drive to a and get this message The disk drive for /boot is not ready yet or not present. Continue to wait or press S to skip or M for manual recovery. Pressing S gets me into the OS, and upon doing a cat /proc/mdstat I get md0 : inactive sda5[0](S) 240832 blocks md1 : active raid1 sda1[0] 976510912 blocks [2/1] [U_] This is with a blank drive in at sdb and not having done any configuring yet.
