> 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. cat /proc/partitions still shows me the 3 partitions. I actually copied /boot to the "replaced disk" and it is able to boot up, but without any filesystem, so i guess the boot is still intact. So do i need to mount /boot and /?