Hi,
I'm puzzled. I have 6 Firewire drives -- sda1-sdf1 -- in a RAID 10 array.
Each drive has only one primary partition. I have three pairs of RAID 1
arrays. On top of that I have a RAID 0 array using all six drives.
I just had to reinstall Mandrake 9.2. After successful installation, when I
tried to activate the arrays with mdadm (I saved the uuid information for each
array, of course) , two of the drives came up as faulty.
When I ran mdadm -E /dev/sdX1 on each drive, I saw that there were indeed
two drives with each of the three uuid's. In other words, all of the required
drives with the correct uuids were found. The two drives marked "faulty" say
"dirty, no errors" -- and they have uuids that match two of the other drives
that ARE active.
And when I run mdadm -Av uuid={string of numbers/letters} /dev/md0 or
/dev/md2, mdadm tells me that 2 drives have been found but it's only starting the
array with one drive.
My questions are:
1) Does anybody know why this has happened? It is likely that the device ids
changed for my drives with this Mandrake reinstallation because I moved
around one of my PCI firewire cards to a different slot. Is it possible that, as a
result Linux Raid getting confused about which of the two drives in each array
is supposed to be the "main drive" and which is the "copy"? Does that matter?
2) At this point, Is there a way to reactivate the faulty drives without
having to resync the arrays?
3) If the answer to number 2 is "no", what do I have to do to get the faulty
drives back into the arrays?
4) Do you think this could have anything to do with using the XFS filesystem
on those arrays?
Finally, I have one more question.
When I reinstalled Mandrake 9.2, the installation program detected that the
arrays were there. (Last time I installed Mandrake, I built the arrays AFTER
installation)
So now each time I boot up Linux, I see that the raid autostart is being
detected on my drives. I never used to see this before this re-install -- even
after creating the arrays. I want to start my arrays manually after each boot
up. I don't want them to start automatically. I don't even want Linux to try to
start them automatically.
Have I gotten myself into an unstable situation? If so, how do I correct it?
Thanks in advance for your help.
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