Path: utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!wuarchive!udel!chocolate!jacobs From: jacobs@chocolate.it.udel.edu (michael jacobs) Newsgroups: comp.sys.ibm.pc Subject: Re: Formatting 1.2 Meg disks to 360K question Keywords: formatting floppies Message-ID: <7795@nigel.udel.EDU> Date: 10 Jan 90 00:00:08 GMT References: <3226@ucrmath.UCR.EDU> <7715@nigel.udel.EDU> Sender: usenet@udel.EDU Reply-To: jacobs@freezer.it.udel.edu (michael jacobs) Organization: Yoyodyne Propulsion Systems Lines: 28 In article jacobs@cs.utah.edu (Steven R. Jacobs) writes: =>In article <7715@nigel.udel.EDU> jacobs@chocolate.it.udel.edu (michael jacobs) writes: =>>In article <3226@ucrmath.UCR.EDU> lulu@ucrmath.UUCP (david lu) writes: =>>=>I just tried to format some 1.2 Meg, high density disks in my =>>=>360K drive (as 360K), and I got the following error message: =>>=> =>>=> Invalid media or Track 0 bad - disk unusable =>> =>>Having just had this problem, I asked around and it seems that High Density =>>disks and Double Density disks (used for 360k) do have physical differences. =>> =>The person that told you this was either joking or making it up to =>disguise their ignorance. Physically, the two types of disks are =>similar, with oxide covering the entire surface of the disk. The =>difference is in the oxide itself. On the high density disks, the =>oxide is a different material which requires a stronger magnetic =>field to record information. The heads in many 360K drives are =>not designed to produce a strong enough magnetic field to record =>data on the high density floppies. I'd call that a physical difference. It has to do with what the floppy is made of, not on just what the floppy drive is doing. Mike J | The Grey Sysop... | Phone...RING!...yep yep yep yep yep! |