I was dumping a few old disks with my stuff on it today, and I discovered that strangely, one of the dumps had a different size than all the others (1.492.992 bytes instead of 1.474.560) which is exactly 1 track, 2 sides, 18sectors/track more than a "regular" dump.
The additional track was filled with @-characters and this "signature":
Code: Select all
@@@@11/27/94 05:23@@0404 B88 @@@@@004519@@@@@@@@@@sma4-25n4-01@@@
I'm pretty sure I didn't have any equipment back then to format the disk with more than 80 tracks (I think standard FDCs were not able to do that). The disk in question is a Sony "DOS formatted" disk that probably came preformatted when I bought it, so I guess this must be some sort of signature that the manufacturer put on the disk. Was that common practice back then? Or maybe it is something entirely different? googling for the signature turned up nothing helpful...