On 8/19/06, Jeffrey Ross <jeff@xxxxxxxxxx> wrote:
Well I figured it out, actually pretty simple once you realize what's going on. To recover the RAID volumes I did the following: Boot the linux distribution CD with the command "linux rescue" The system didn't find any of my partitions which is what I expected. next I used fdisk to partition the new disk and set the partition type to be 0xdf (Linux Raid). Since the /boot partition was RAID-1 I just had to simply format the new /boot partition as ext3 and copy the old to the new with dump/restore, run grub to lay down a new boot loader etc. The fun part now began, how to recreate the other partitions which were stripped with RAID-5. After much looking around I found the command mdadm which allows you to manipulate the RAID volumes. At this point I verified my partitions with "mdadm --query /dev/sdbX" to make sure which partition used to belong to which RAID volume. Once I positively identified the remaining members of each group I then issued the command: mdadm --assemble /dev/md1 /dev/sdb2 /dev/sdc2 /dev/sdd2 That would bring the volume up with 3 of the 4 volume members, I then added the 4th member with the command: mdadm /dev/md1 -a /dev/sda2 At this point the system would happily chug away rebuilding the missing volume member. I repeated the above for each of the raid volumes and at that point was able to reload the system. Jeff I Wrote: > I have a new (experimental) system that I installed software raid with. > > The system has 4 - identical 18GB SCSI disks and I installed the > partitions as follows: > > /, /var, /usr, /home, and swap were made by carving out identical > partitions out of the 4 disks and set as raid 5 with no spares > > The /boot partition was set raid 1 on the first two drives and set aside > partitions on the other two disks as spares. > > Now I have failed my boot disk (SCSI ID 0) and I want to restore it, > copying over the /boot partition and telling grub to use it wasn't that > difficult, however I am at a loss to recover the other filesystems > without being able to load "/" the system panics at boot time. > > What am I doing wrong? This is a FC5 install as it came off the CD's > > Thanks, Jeff > > > > -- fedora-list mailing list fedora-list@xxxxxxxxxx To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list
Hi again Jeff! Megathanks for the reply. RAID, LVM, and EVMS are all issues that kind of "scare" me at this point. I guess we all get there bit by bit (well, in today's world perhaps "byte by byte"). Glad you got it! Tod
