Thanks Rayza & Mark, Unfortunately, I'm not making much progress. 1) Both the BIOS and RAID card drivers are the latest version. (V2.05) From: http://www.highpoint-tech.com/USA/bios_rr1640.htm 2) It says nothing about 'primary' and 'secondary' drives. So I think IDE setup is not a problem. It has [none] in BIOS. Only the CD-ROM is present as IDE Secondary slave. 3) The floppy disk is in the drive at all times. It still cannot read the file. The weird thing is that it reads it earlier, it just when it starts to copy files to XP that it cannot read it. 4) I'm never prompted to remove the diskette, so that must be after the stage I can't get past. Some questions... 1) I've created the RAID 1 array in BIOS already, and done the mirroring. So when XP asks me to do partitioning it only sees 1 disk. Would it make a difference if I created the array after the Windows XP installation? 2) I got first boot device set to SCSI and second to CD-ROM. ok? (and yes, in the RocketRAID BIOS utility, the array is also marked as BOOT) 3) If I go into RocketRAID BIOS setting utility, the two disks are at channel 2 and 4. Should they be in 1 and 2? Does this make a difference? 4) The disk mode is now ATA/150. Is it possible that this is too fast and that I should set it to a slower mode like. ATA/66 or ATA/100? The motherboard isn't that new. I'm not sure what difference the mode makes?