9.10 not recognizing 9.04 partitions [old superblocks?]

[StargazerA5]

Binary package hint: mdadm

I created a RAID1 data(non-root, os is installed on a separate physical disk /dev/sdb) array in Jaunty 64 using all of sda1 and sdc1. Due to some unrelated problems, I had to do a fresh install and decided to use Karmic. I have not been able to get the array to be discovered in Karmic 64. In investigating, I noticed that Karmic had /dev/sda and /dev/sdc; while Jaunty had /dev/sda, /dev/sda1, /dev/sdc, and /dev/sdc1. Verified that discrepancy via a Jaunty 64 install disk.

Karmic:
---
root@Draco:~# ls/dev/sd*
/dev/sda /dev/sdb1 /dev/sdb3 /dev/sdb5
/dev/sdb /dev/sdb2 /dev/sdb4 /dev/sdc
root@Draco:~#
---
Jaunty:
---
root@ubuntu:~# ls/dev/sd*
/dev/sda /dev/sdb /dev/sdb2 /dev/sdb4 /dev/sdc
/dev/sda1 /dev/sdb1 /dev/sdb3 /dev/sdb5 /dev/sdc1
root@ubuntu:~#
---

Running fdisk in Karmic does reveal the partitions (note sdb6 and sdb7 deleted since running this output):

----
root@Draco:~# fdisk -l

Disk /dev/sda: 1000.2 GB, 1000204886016 bytes
255 heads, 63 sectors/track, 121601 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x000e819b

   Device Boot Start End Blocks Id System
/dev/sda1 * 1 121601 976760001 fd Linux raid autodetect

Disk /dev/sdb: 1000.2 GB, 1000204886016 bytes
255 heads, 63 sectors/track, 121601 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x00068bd7

   Device Boot Start End Blocks Id System
/dev/sdb1 * 1 15024 120680248+ 83 Linux
/dev/sdb2 15667 15810 1156680 82 Linux swap / Solaris
/dev/sdb3 15811 23821 64348357+ 83 Linux
/dev/sdb4 23822 121601 785417850 5 Extended
/dev/sdb5 43225 121601 629563221 83 Linux
/dev/sdb6 * 23822 42431 149484762 83 Linux
/dev/sdb7 42432 43224 6369741 82 Linux swap / Solaris

Partition table entries are not in disk order

Disk /dev/sdc: 1000.2 GB, 1000204886016 bytes
255 heads, 63 sectors/track, 121601 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x00060ccb

   Device Boot Start End Blocks Id System
/dev/sdc1 1 121601 976760001 fd Linux raid autodetect

---

I suspect that the reason I can not detect the array is that Karmic can't see the partitions (though fdisk can???).

I further verified this behavior by checking /dev using a Karmic 64 disk

I also have a thread with more information about my attempts at using mdam failing at http://ubuntuforums.org/showthread.php?p=8962522

StargazerA5

[ceg (ceg)]

Maybe https://wiki.ubuntu.com/ReliableRaid (Blocked hotplugging mechanisims)?

[StargazerA5 (ubuntulaunchpad-beyondthishorizon)]

Hi Ceg,

I think I partially understood that, but I don't think I understood well enough to check it out. Can you advise what I should do?

Thanks!

StargazerA5

[ceg (ceg)]

Bug #442735 dmraid eats mdadm-managed raid in upgrading from 9.04 to 9.10

If you don't use sata fakeraid, try uninstalling dmraid and "sudo update-initramfs -k all -u".

[StargazerA5 (ubuntulaunchpad-beyondthishorizon)]

That did it! Once dmraid was gone (and I reboot) Karmic started recognizing the missing partitions. Once that happened, I just had to get the array up and running.