CentOS List wrote: >>>>> 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] Perhaps your raid wasn't really working the way you thought before. From the rescue boot, does fdisk show the 3 partitions on the old disk with type 'fd'? Can you mount the old /boot and / partitions somewhere by hand? You should be able to do this with the /dev/sda1 and /dev/sda3 device names if the md devices aren't detected at boot. -- Les Mikesell lesmikesell at gmail.com