Basheer wrote:
Hi,
Hi
I'm not familiar with your kernel or mdadm versions - please say.
Drive 1
----------
/dev/sda1 = swap
/dev/sda2 = linux raid (os & data is here)
/dev/sda3 = linux raid
Are you describing partition types here (ie 0xfd = raid autodetect in fdisk)?
Drive 2
----------
/dev/sdb1 = swap
/dev/sdb2 = linux resiser
/dev/sdb3 = linux reiser
Do you mean you actually have live filesystems here?
You seem to indicate that there are filesystems on disk 2 but none on disk 1.
Yet you say "os & data is here" ?
What do you mean by that?
Please show:
* partitions of both disks
* existing filesystems on both disks
FYI A raid device is usually made from empty partitions (devices) and you create
a new filesystem inside the raid device. You can't usually just 'raid' them
after the fact.
Using mdadm I managed to create /dev/md0 in raid 1 (mirror).
What command?
/dev/sda3 & /dev/sdb3 where added to this set.
That would make sense - but a normal md device has a superblock and this would
overwrite bits of your filesystem if you already have data on the disk. That is bad.
Good so far....
hmmmm.... debatable :)
now for the problem....
Problems Area
-----------------------
Using mdadm I failed to create /dev/md1 in raid 1 (mirror).
/dev/sda2 & /dev/sdb2 where part of this set.
I get this error: mdadm: cannot open device /dev/sda2: Device or
resource busy.
yes. It sounds like you've got some confusion about creating a mirrored
filesystem. I suspect you have a mounted filesystem on /dev/sda2
Have a look at the FAQ stuff here:
http://linux-raid.osdl.org/
I booted from rescue CD, and ran the mdam command to create /dev/md1
... and it worked! I let the raid sync.
Well, it would :)
The rescue system won't have mounted anything.
> How to do I solve this?
I think you need to:
* repair any damage to your data
* prepare your kernel and init system
* go to a rescue system
* create a 'broken' mirror using your empty disk (disk2?).
* make a filesystem on the broken mirror
* copy the good filesystems to the broken mirror
* add the now free partitions from disk1 to the broken mirror
* wait for a resync
* reboot
David
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