On 7/15/2006 at 3:09 PM Fred Cisin wrote: >GCR >MFM without WD/IBM sector headers (Amiga) >certain address marks >with some FDC's FM >with some FDC's 128 byte sectors >damaged disks (both accidents and some copy protection) Also: Hard-sectored "Strange" recording methods (e.g. OSI) --Chuck