![]() ![]() This one seems to have the best support as I didn't have to first format to 720k before going back to 1.44MB from 1.2MB. Remembered I had another dedicated USB Dell drive so tested it as well. Here are the ones that seem to fully support 3-mode (with the same caveats if you want to format back to 1.44MB)Ĭaveat - to go back to 1.44MB, you must cover the 1.44MB hole and do a format a: /f:720 and then when that is done, uncover the hole and then do a regular format. To get to 1.2MB on all drives, I used this command: ![]() so fired up a laptop with 98SE on it and tested all my different USB drives: Does 3-mode have to be enabled in BIOS even if the drive is USB? I wouldn't think so since that should only apply to drives connected to the floppy controller.Ĭan you use DOSBox and a DOS utility that supports 1.2MB formatting? Going to go ahead and fire up a machine with 98SE and see what that gets me. See here for a list of supposedly supported 3 mode drives: However, I am getting the same "Parameters not supported by drive" error so I am guessing that Windows 10 simply will not work to format a 3.5" disk to 1.2MB. Neither of them work with the USB 3.0 ports but they do work with the USB 2.0 ports. I do have a couple Sony Vaio USB floppy drives, one of which is definitely supposed to support 3-mode. ![]() Same thing happens though if I try to format 720k without covering the hole that tells the drive that it is 1.44MB. Neither of the Dell models I have that support USB (FDDM-101 and MPF82E ) and the Smartdisk 2x USB drive all return an error saying "Parameters not supported by drive". I'm testing in Windows 10 command prompt so that may be part of it but I am not sure. Technically it's a TEAC but either is hard to come by (and with IBM branded ones the 3-mode support is only up to certain manufacturing date!). Most "western" FDD don't support it even in native mode, much less over USB.Ĭurrently I'm using IBM FD-05PUB and it does support all modes but I'm worried it might die someday and so I'm looking for a backup. The problem is different rotation speed (360rpm vs 300rpm). Does it work with 3.5" floppies formatted to 1.2MB? Also known as 3-mode, older Japanese systems used this format. ![]()
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