Can't read CP/M disks on PC

So now that I've got the 8" drive running well on the PC, I am trying to read 8" CP/M disks. 22Disk is giving me sector not found errors (cylinder 2, side 0, sector 1) and the DOS CP/M tools are giving me "Unknown floppy disk format", even on disks that read fine on my NEC APC. I tried reading in a sector using debug but I also get read errors. Any ideas? The drive is a Tandon TM 848-02. Very little information online, but it seems to support DSDD. -- Sellam Ismail Vintage Computer Festival ------------------------------------------------------------------------------ International Man of Intrigue and Danger http://www.vintage.org [ Old computing resources for business || Buy/Sell/Trade Vintage Computers ] [ and academia at www.VintageTech.com || at http://marketplace.vintage.org ]