I wish to convert a server (openSuse v11.4, soon to be 12.3) with a single system disk drive to a two-disk RAID1 array. The current single disk is 250GB; the replacement RAID disks are 500GB.
Here is my plan for preparing the array. The first part creates the enlarged partitions on the array, and copies the original disk data to the new disks. The second part creates the RAID.
----Part 1----
Boot to a "Live CD", e.g.: Knoppix
Existing (single) disk:
Partition and format the two new disks, 500GB (say they are mounted as /dev/sdj and /dev/sdk)
- Create with "linux RAID" file system ID (0xfd)
- Create to mount at boot time
Then
----Part 2----
Here is where it starts to get fuzzy. I have searched for methods to do this. The several tutorials conflict in a number of ways. For instance, is </dev/md0> all that is needed? Or should there be a </dev/mdX> for each disk in the array? I suspect the conflicting information is due to when each article was published, some in 2008, others in 2011.
From <raid.wiki.kernel.org/index.php/RAID_setup>:
where the uuid-of-sdX is of the form "86055940-90ad-4009-8fc9-3215bf2cf751"
Questions:
Is that above correct? And in the correct order?
Can these RAID steps be performed with the YAsT Partition (graphical) editor?
I presume Part 2 is performed before booting the system? Does it matter?
Is /dev/md0 entered in /etc/fstab in some way?
How to boot from /dev/md0?
Here is my plan for preparing the array. The first part creates the enlarged partitions on the array, and copies the original disk data to the new disks. The second part creates the RAID.
----Part 1----
Boot to a "Live CD", e.g.: Knoppix
Existing (single) disk:
Code:
/dev/sdb2 on / type ext4 (rw,relatime,user_xattr,acl,barrier=1,data=ordered)
/dev/sdb3 on /home type ext4 (rw,relatime,user_xattr,acl,barrier=1,data=ordered)
/dev/sda1 on /data01 type ext3 (rw,relatime,errors=continue,user_xattr,acl,commit=15,barrier=1,data=ordered)
/dev/sda1 230G 97G 121G 45% /data01
/dev/sdb1 2G swap
/dev/sdb2 20G 14G 5.6G 71% /
/dev/sdb3 130G 1.1G 122G 1% /home- Create with "linux RAID" file system ID (0xfd)
- Create to mount at boot time
Code:
/dev/sdj1 2G swap
/dev/sdj2 98G /
/dev/sdj3 400G /home
/dev/sdk1 2G swap
/dev/sdk2 98G /
/dev/sdk3 400G /homeCode:
dd if=/dev/sdb1 of=/dev/sdj1
dd if=/dev/sdb2 of=/dev/sdj2
dd if=/dev/sdb3 of=/dev/sdj3
dd if=/dev/sdj of=/dev/sdkHere is where it starts to get fuzzy. I have searched for methods to do this. The several tutorials conflict in a number of ways. For instance, is </dev/md0> all that is needed? Or should there be a </dev/mdX> for each disk in the array? I suspect the conflicting information is due to when each article was published, some in 2008, others in 2011.
From <raid.wiki.kernel.org/index.php/RAID_setup>:
Code:
mdadm --create --verbose /dev/md0 --level=1 --raid-devices=2
mdadm --scan --assemble --uuid=uuid-of-sdj:uuid-of-sdk
mdadm --monitor /dev/md0Questions:
Is that above correct? And in the correct order?
Can these RAID steps be performed with the YAsT Partition (graphical) editor?
I presume Part 2 is performed before booting the system? Does it matter?
Is /dev/md0 entered in /etc/fstab in some way?
How to boot from /dev/md0?