I've noticed something odd with my 8" disk drive. It seems to produce a
lot of errors on the last tracks on side 1 when using Anadisk. Anadisk
Rmemeebr that the last tracks are physically shorter, which means the bit
density is higher on them. So if there's anything marginal -- a worn
head, slight misalignment, etc -- it'll show up there first.
What does "Gap in sectors" under Anadisk
mean anyway?
IIRC, it means it found, say, sectors 0, 1, 2, 4, 5, 6, 7, 8. It never
found a sector numbered 3. This might be right (it's perfectly possible
to format a disk like that), but often it means the sector header was
unreadable.
One thing to check is if the total number of sectors is the same on all
tracks. For most systems (that can be read by a PC controller) it will
be, so if you get the 'Gap in Sectors' message and there's one fewer
sector found, it's almost vertain it didn't manage to read that sector
header.
Is this just a case of disks that are just old and wearing out or
something weird with my drive?
If it was mine, I'd do the full set of tests on the drive, which would
mean buying an alignment disk. And 8" alignment disks seem to be
particularly expensive.
-tony