Seung-Goo Kim wrote: > > I have Sony FDD named MFD-17W-L5(or MD-F17W-L5). It has black mounting

And my answer is: See, this list is dealing with computers that are _at_least_ ten years old. I doubt any of your hardware qualifies for that, so maybe you better ask again in one of those many PeeCee mailing lists that are around most anywhere. From general technical knowledge (I hope never to be a PC expert at all!): if the drive works fine after booting, then probably your BIOS needs some tuning, like setting the boot order in which drives are tried. If you have never touched those CMOS RAM settings yourself, you'll want to ask someone for help with this. Changing the switch on the drive will probably make it either drive A: or B:, I guess; the other two positions will probably be useless for mounting in a PC. They were for real computers, at times when real computers would use floppy drives, and before the PCs messed up everything accepted as standards before (like having four drive select lines on ST506, not two as in "A: or B:") (or like setting drive identity with a switch on the drive, not by twisting a cable). -- Andreas Freiherr Vishay Semiconductor GmbH, Heilbronn, Germany http://www.vishay.com