>>>> I am running raid 1 on a centos 4.4. One of the harddisk (sda1) failed. >>>> How can i carry on running the server using only sda2? >>> >>> Generate a grub floppy and use that to load the grub menu from the sdb >>> (probably now sda) disk. >>> >>> If you are really talking about sda1 and sda2, those are partitions on >>> the same disk. >> >> Is there a detail step by step howto? The raid 1 has no LVM. just md0, >> md1 and md2. md0 is /boot, md1 is swap and md2 is the storage. I had >> replace sba with a new disk. I tried to boot up and it says kernel panic. >> How am i going to reconstruct the raid and sync sdb to sda? > > It might be easier to swap the old sdb into the sda position so you'll > boot from it, but you should also be able to boot the install cd with If swapped and booted, and got a kernel panic error. > 'linux rescue' at the boot prompt, let it detect and mount your system > (which will be the 'broken' raid devices with their single members), If i use linux rescue, The 3 mds I created are gone. /cat /proc/mdstat says Personalitlies: [raid0] [raid1] [raid5] [raid6], no longer Personalities : [raid1]