UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - 5.25 & 3.5 inch diskettes -any use still?

emeritus · 16th Jan 2013, 9:52 pm

I have formatted 1.44M disks to 720k in the external 720k 3 1/2" drive I fitted to my Amstrad PCW8256. While it usually worked, formtting and writing took a long time as it sounded as if the drive was repetitively going back for another go to complete the operation. The respective magnetic coatings of 720k and 1.44M disks have different coercivities. I haven't tried to format a 1.44M to 720K using a 1.44 M drive.

16th Jan 2013, 9:52 pm	#18
emeritus Dekatron Join Date: Jan 2012 Location: Brentwood, Essex, UK. Posts: 5,355	Re: 5.25 & 3.5 inch diskettes -any use still? I have formatted 1.44M disks to 720k in the external 720k 3 1/2" drive I fitted to my Amstrad PCW8256. While it usually worked, formtting and writing took a long time as it sounded as if the drive was repetitively going back for another go to complete the operation. The respective magnetic coatings of 720k and 1.44M disks have different coercivities. I haven't tried to format a 1.44M to 720K using a 1.44 M drive.