Raid drives???

Tom H tomh0665 at
Wed Dec 1 08:58:53 UTC 2010

On Tue, Nov 30, 2010 at 5:42 PM, GeraldCC <gcsgcatling at> wrote:
> I have the ALT version on KUbuntu installed on a AsUS motherboard 2GB ram 3-
> core CPU and 3 sata2 drive each of 160GB.
> I have md0 --root
> md1 ---swap
> md2 ---/home
> md3 ---?? should be /mnt/data
> Now md3 has data in from PCLinuxOS when it was installed.
> I cannot get md3 to mount. I get all sorts of problems. From drives (sda4-sdc4
> or sda5-sdc5) not being there or allready in use or not formatted correctly???
> I have done re-install of KUbuntu and let it make the raid device md3 and
> formatting it, but it is still not mountable.

Far too little information in this rant...

1. What'd the output of "cat /proc/mdstat"?

2. What's the output of "mdadm --examine --scan --config=partitions"?

3. If md3 was previously created, the hostname of the other install is
in md3's superblock so md3 has to be assembled with "--homehost". If
it's auto-assembled, its name's most likely not md3 but md127 (or
md126 if there's another md device in the same category).

4. Which of sda4, sdc4, sda5, sdc5 compose md3? What's md3's raid level?

5. Did you zero out the superblock(s) before re-installing Kubuntu?

6. What's the "/etc/fstab" entry or the mount invocation that's used for md3?

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