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 /?
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