I hate to be the party pooper here and ruin the fun, but being an 18 year computer veteran who has seen this happen unsuccessfully all too often, I must bear the bad news.
You should NEVER format a 1.4MB as an 800K. The media itself is different and even if it works for a while you'll run into problems because a 1.4MB floppy wasn't designed to work as an 800K.
The same logic applies to using an 800K as a 1.4MB. The media is different!!!
You CAN use 400K and 800K interchangeably, but if you have a disk you've used as a 400K for more than a few years in only 400K drives don't use it as an 800K. The pads on 400K drives will wear out that side a bit.
As for finding 800K disks, here is a link to purchase Imation disks...the picture is wrong but the specs are right:
http://www.superwarehouse.com/Imation_3.5_DS_DD_Floppy_(10_pk)/12882/p/46719
I recommend you get NIB disks and not some guy's old floppies that he's been using since 1990.
You should NEVER format a 1.4MB as an 800K. The media itself is different and even if it works for a while you'll run into problems because a 1.4MB floppy wasn't designed to work as an 800K.
The same logic applies to using an 800K as a 1.4MB. The media is different!!!
You CAN use 400K and 800K interchangeably, but if you have a disk you've used as a 400K for more than a few years in only 400K drives don't use it as an 800K. The pads on 400K drives will wear out that side a bit.
As for finding 800K disks, here is a link to purchase Imation disks...the picture is wrong but the specs are right:
http://www.superwarehouse.com/Imation_3.5_DS_DD_Floppy_(10_pk)/12882/p/46719
I recommend you get NIB disks and not some guy's old floppies that he's been using since 1990.