Hi,
I have a PC I use just for backup few other windows PCs.
It has 1 200GB PATA for the OS and 4 300GB SATA hard disks for the backup storage.
It was running Fedora 5 and the 4 SATA drives were cfg in RAID5 mode.
I was an happy camper when for some reason my RAID screw up and I lost all my backups
I decided to use such disaster to migrate to Fedora6.
I started from scratch a complete new installation (fdisk and so on), but for some reason the first 2 of the 4 SATA hard drives cannot be cfg as RAID anymore as the system (mdadm) always reports them as Device is Busy or used by some other application.
I also tried to physically swap the hdu cabling to rule out any HW problem, but I still get /dev/sda1 and /dev/sdb1 devices as busy doesn't matter which physical drive is mapped to them.
No problems with /dev/sdc1 and /dev/sdd1.
I repeated several times the whole process (fdisk, mdadm, etc), but I can't see/use all my 4 SATA drives anymore.
I'm not an Linux expert, and I ran out of ideas.
Any suggestion?

Tx in advance.
Fabio