ss202sl :
You'd lose everything on the drives. You'd have rebuild the OS and have 2 additional drives for storage. Your system would still see the drives, and Windows would see them as empty drives, and you'd have to partition them and format them, just like any new drive.
I am inclined to think you are incorrect in your answer here. I have one of these cards in my computer and it had 4 250gb wd hard drives on it. When I tried to use the drives after replacing them with larger drives in a JBOD array I was unable to use them as they would not be seen by my motherboard. I am referring to the four drives I removed, those (4) 250gb wd. Those drives were put back on the card and I then deleted the raid array of which they were a part. I put them back to being single drives and were identifed as being normal on the card's bios window. I tried to use them to no avail. I then tried another way to make the drives be seen by having the card make them be a JBOD array and they are then shown to be initialized in the card bios utility. I again tried to use them on the computer's sata ports with no success.
I should temper that "no success" statement. The drives will seem to be seen by hard disk manager and I was able to repartition them and format the partition. I then mounted the drives and they were then seen by the system motherboard and winXp, but ONLY until I removed power and shut down the computer. When power was turned back on and WinXP rebooted, the drives were no longer seen by the system.
When I then put those drives back on the card, they were able to be seen again.
I was only able to move the drives off the card and onto a sata port on the motherboard if I did that without taking power off the drive and without turning off the computer first. In other words, it was done while the system was up and running winxp.
I think that the rocketraid 1740 writes the mbr on the drives to another spot in the boot block on the drive and the only way to keep the drive running without the card is to never remove power from the drive. This is not a practical solutiion.
I wonder if anyone has a way to move the mbr back to the spot where it needs to be to be seen by a normal system bios.