Here's the mdadm command I am using:
# mdadm -Cv /dev/md0 -l5 -n3 -c128 /dev/sdb /dev/sdc /dev/sdd
Hmmm... Shouldn't those three really be partitions on the disk (not entire disk)? With partitions being of type 0xfd (Linux raid autodetect). What is the output of "cat /proc/mdstat"?
Try doing above with partitions (for example, /dev/sdb1 /dev/sdc1 /dev/sdd1), make sure you set them to type 0xfd using fdisk before you create RAID device, and see what happens.
-- Aleksandar Milivojevic <amilivojevic@xxxxxx> Pollard Banknote Limited Systems Administrator 1499 Buffalo Place Tel: (204) 474-2323 ext 276 Winnipeg, MB R3T 1L7