[no subject]

That would be *some* applications.  :)  (or maybe :()
All the versions of DOS' (native) "backup" pgm I
ever tried/used would happily overwrite a floppy
if you merely removed & reinserted it, with no disk
content/filename/sequence checking at all and not even a
warning/confirmation message.  :(  Backup would not continue
until it detected a disk change.  It did not, however,
check the disk contents.  This was one reason among some
others that DOS's backup program was severely frowned-on.

DOS even had/has an error/status message(s) along the
lines of "disk change error on drive ..." or "disk change
detected in drive ..."

Fwiw, Unix (& I daresay Linux & BSD as well) utilities such
as tar & cpio were hardly better in this regard.  {sigh}
The "cure" ended up being no longer using floppies for backup, period.

>I think PKZip spanned in a similar way with the zip file holding the
>information of its' place in the series.

Exactly, this is one of the Great Features of most every
"add-on" backup/archiving program I ever saw over what
was included with the OS itself.

>also i remember the disk drive being polled during the process, so that's
>how i figured it "knew" there was a different disk in the drive.

Yup, but that was/is application dependent.  :)

-kc


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