The Floppy Disk is rotated at 300 RPM for normal disks (DD) and 360 RPM for high density disks (HD). and with 3.5' 1.44MB disks so I'm flying a bit blind here but if I have one disk that works great and none of the others do I've gotta suspect I'm just not getting the right disks or something is wrong with what I have.Floppy Disk Formats Phil Storrs PC Hardware book DOS Computers and floppy disk drives Floppy Disk Drive Mechanics. Most of my floppy disk experience is in DOS. It's very strange unless I managed to just buy two packages of bad disks in a row and only this one random one in my junk pile works? Also I've tried two different disk drives and the result is the same. instead of XXXXX I see VVVVV (I assume for Verified) and I can boot off the disk and everything. anyway that disk formats without complaint and I can write an image to it without issue. which would make me think maybe the drive is bad BUT then I just had one disk laying around in my piles of old PC junk just says it's a Verbatim on the label.

Then when I try to actually write out a disk image as it's writing I hear a nasty buzzing sound and as the progress bar goes by it's all turning to XXXXXX which I assume is bad tracks/sectors/blocks/whatever. so then I format it and if I refresh I'll see the name I gave the disk although sometimes it gives me some error about the drive door being open but whatever it appears to work.

I bootstrap ADTPRO and go to format, I get IO error. I have a box of Sony DSDD disks and another package of no-name disks. I'm trying to figure out why I'm having problems too.

Ibm formatted floppy disk