hardware raid 5 and software raid 0 stripe broke.
We have a Linux box running redhat 7.2 We have two hardware controllers in it with about 500gig's each. They're raid 5. We were using a software raid to combine them all together. 1 hard drive went down so we replaced it and now the system won't boot. We have used a Knoppix boot cd to get into a linux system. We can see /dev/sda1 and /dev/sdb1. However, /dev/md0 cannot be accessed. Is there a safe way to create the software raid from the cd to see if maybe mdadm on the original system got corrupt? any help would be greatly appreciated.
Sincerly,
Ken
Quoted 8 lines · On Thursday May 11, [email protected] wrote:
We have a Linux box running redhat 7.2 We have two hardware
controllers in it with about 500gig's each. They're raid 5. We were
using a software raid to combine them all together. 1 hard drive went
down so we replaced it and now the system won't boot. We have used a
Knoppix boot cd to get into a linux system. We can see/dev/sda1and/dev/sdb1. However,/dev/md0cannot be accessed. Is there a safe way
to create the software raid from the cd to see if maybe mdadm on the
original system got corrupt? any help would be greatly appreciated.
What booted off knoppix, what does
mdadm -E /dev/sda1
mdadm -E /dev/sdb1
produce?
How about
mdadm -A /dev/md0 /dev/sda1 /dev/sdb1
NeilBrown
Quoted 10 lines · Neil Brown
Quoted 2 lines · On Thursday May 11, [email protected] wrote:
We have a Linux box running redhat 7.2 We have two hardware controllers in it with about 500gig's each. They're raid 5. We were using a software raid to combine them all together. 1 hard drive went down so we replaced it and now the system won't boot. We have used a Knoppix boot cd to get into a linux system. We can see
/dev/sda1and/dev/sdb1. However,/dev/md0cannot be accessed. Is there a safe way to create the software raid from the cd to see if maybe mdadm on the original system got corrupt? any help would be greatly appreciated.What booted off knoppix, what does
mdadm -E
/dev/sda1
mdadm -E/dev/sdb1
Quoted 8 lines
produce?
How about
mdadm -A/dev/md0/dev/sda1/dev/sdb1NeilBrown
Thank you for your response Neil. We got it up and running again. I don't remember what we did though. We've been going on no sleep all week trying to setup a new server and right before the old one crashed we were all ready to go home and take a little rest.
Thanks again.
--Ken