Path: utzoo!attcan!utgpu!watmath!watdragon!rose!trgauchat
From: trgauchat@rose.waterloo.edu (Terry Gauchat)
Newsgroups: comp.sys.ibm.pc
Subject: Re: 1.2meg/360k compatibility question
Message-ID: <15167@watdragon.waterloo.edu>
Date: 16 Jul 89 17:24:27 GMT
References: <IYiAOwy00UhBI1IEMx@andrew.cmu.edu> <561@amms4.UUCP>
Sender: daemon@watdragon.waterloo.edu
Reply-To: trgauchat@rose.waterloo.edu (Terry Gauchat)
Organization: U. of Waterloo, Ontario
Lines: 21

In article <561@amms4.UUCP> hjg@amms4.UUCP (Harry Gross) writes:
}In the case of the 720K vs. 1.44M drives, no such problem exists.  The data
}tracks are the same size on both drives.  The only difference is whether or not
}data is recorded on one side, or both sides.
}

Please get it through your heads...!  720K and 1.44Meg 3-1/2" drives are
                                      both DOUBLE SIDED.

                                      Both have the same number of tracks too.

                                      1.44 Meg uses 18 sectors/track vs 9.

                                      To get this extra density, CrOxide is
                                      is used rather than Iron Oxide
                                      (think better quality cassette tapes).

                                      For digital data, however, IronOxide (DD)
                                      disks may work fine if formatted (HD).

...Terry.