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it should be ok. however you use hardware or software raid in sata and ide? easier way is
1. u boot via live cd
2. copy entire system from ide to sata.
3. after complete copy all files, using fedora core recovery cd(2,3, 4,5 or 6 up to u),
4. chroot to the '/' directory in sata
5. edit /etc/fstab and /boot/grub/menu.lst to suit new environment
6. perform grub-install in new hdd (/dev/sda or /dev/sdb or ...)
Please don't simply remove your old raid, it is just logically and I'd never try this. remember your linux must able to detect the sata devices, and I assume you don't have any encrypted partition.
If you use hardware raid, then it is transparent to your OS and the computer will consider it as a normal hard disk, probably sda or sdb.
Once you copy everything from old hdd into new sata hdd. then you done majority of thing. However, you still need to make sure the new hdd able to boot, in ide harddisk that is 1st 1024byte for boot, partition table and etc. I don't know how about the hardware raid, but i think is no much difference, and you need to make it otherwise your linux maynot boot.
Normally how we do is using command grub-install /dev/yournewhdd
i assume your sata device have only 2 partition
in fc recovery disk, probably mount sata hdd array at /media/sysimage (i forgot the path, you can check using 'mount')
-perform 'chroot /media/sysimage' (then it simulate you already boot into new hard disk, definitely not 100%)
-edit /etc/fstab (remeber after chroot), make sure /, swap location is correct
-edit /boot/grub/menu.lst (maybe edit root=(hd0,1),kernel=.../dev/hda1))
-perform grub-install /dev/sdb (I consider /dev/sdb as your sata, /dev/sda as ide hdd)
after this, your system should able to boot, remember this only work if your linux support your new sata raid hardware.
kstan, I wanted to take a moment and update the thread/you on the outcome.
After realizing that I was going from software raid to software raid I realized it wouldnt work. The system had a IDE promise card which was conflicting with the SATA raid I was adding to replace the array.
Realizing this I realized that two of these servers (New parts, services) would cost about 2,000.
I convinced the client to go with all new hardware and install suse.
Ultimately the bill was 3,120 and instead of two older machines with huge disk they ended up with two new machines with huge disks for about a 1000 more.
The cost, time, copying over 440gbs between the old and new server (Times two) for them, but it was a solution.