Problems reading older disk on newer drive

I think we've discussed this before. Sorry if we're re-treading old ground. I'm trying to read a disk an old double-density PC formatted disk on a high-density drive. I can read the directory and certain small files just fine, but any files that are larger than a few sectors (or perhaps that span a track) return "Sector Not Found" errors. What is the deal with that? This is under DOS 6.22. Is there a way to get DOS to recognize that this is a double-density disk and to perform whatever internal magic is necessary to read the disk properly? Or is this an issue of hardware? -- Sellam Ismail Vintage Computer Festival ------------------------------------------------------------------------------ International Man of Intrigue and Danger http://www.vintage.org [ Old computing resources for business || Buy/Sell/Trade Vintage mputers ] [ and academia at www.VintageTech.com || at http://marketplace.vintage.org ]