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mdadm "No arrays found in config file or automatically"

Folks, I have an old Pentium III running Ubuntu Server 8.04 LTS. All running great with a RAID1 array but now its time to upgrade the server.
This morning I removed & installed the same PCI RAID card into the new Server and attached the two SATA RAID1 drives. When I reboot the server fdisk -l sees the drives OK. When I run mdadm --assemble --scan I get the message "No arrays found in config file or automatically" ... What would your next step be to solve this problem ?
Thanks

PS I have made sure no mdadm.config exists !! Should also have mentioned new OS is Ubtunu server 10.10 LTS

upanwar

As per your above given comment you were having hardware RAID, not the software one so If this the case then you will not have anything with mdadm.

COuld you please show us output of below given command.

# df -Th

# fdisk -l

mrmad1966

ASKER

Sorry..I did not explain very well, yes the RAID card is capable of a hardware RAID but I have found mdadm to be very reliable over the life of the old server so I have choosen to stick with mdadm..

=~=~=~=~=~=~=~=~=~=~=~= PuTTY log 2011.04.25 11:10:16 =~=~=~=~=~=~=~=~=~=~=~=

sudo fdisk -l

Disk /dev/sda: 80.0 GB, 80026361856 bytes
255 heads, 63 sectors/track, 9729 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0002f60b

Device Boot Start End Blocks Id System
/dev/sda1 * 1 9328 74920960 83 Linux
/dev/sda2 9328 9730 3227649 5 Extended
/dev/sda5 9328 9730 3227648 82 Linux swap / Solaris

Disk /dev/sdb: 1500.3 GB, 1500301910016 bytes
255 heads, 63 sectors/track, 182401 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00b200b2

Device Boot Start End Blocks Id System
/dev/sdb1 1 182401 1465136001 fd Linux RAID autodetect

Disk /dev/sdc: 1500.3 GB, 1500301910016 bytes
255 heads, 63 sectors/track, 182401 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0xb8c994a3

Device Boot Start End Blocks Id System
/dev/sdc1 1 182401 1465136001 fd Linux RAID autodetect

sudo df -Th
Filesystem Type Size Used Avail Use% Mounted on
/dev/sda1 ext4 71G 1.4G 66G 3% /
none devtmpfs 2.0G 172K 2.0G 1% /dev
none tmpfs 2.0G 0 2.0G 0% /dev/shm
none tmpfs 2.0G 260K 2.0G 1% /var/run
none tmpfs 2.0G 0 2.0G 0% /var/lock
none tmpfs 2.0G 0 2.0G 0% /lib/init/rw

upanwar

As per the output you have software RAID not the hardware RAID. I have asked for the output of command to confrim which RAID you have and It has been confirmed.

upanwar

Please execute the below given command and update the output.

# mdadm --examine --scan /dev/sdb1 /dev/sdc1

If everything fine then create /etc/mdadm.conf by redirecting its output.

# mdadm --examine --scan /dev/sdb1 /dev/sdc1 >> /etc/mdadm.conf

Source: http://www.linuxjournal.com/article/8874?page=0,1

mrmad1966

ASKER

OK
Done as you suggested...All looked good

cat /proc/mdstat

Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [ra id10]
md0 : active raid1 sdc1[0] sdb1[1]
1465135936 blocks [2/2] [UU]

Should I not see the raid rebuilding ?

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upanwar

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mrmad1966

ASKER

Perfect - Thank you

mdadm &quot;No arrays found in config file or automatically&quot;

mdadm "No arrays found in config file or automatically"