Re: noob Question: How to format a floppy on a USB floppy disk drive (on RPi 4) ?

[tlaronde%polynum.com@localhost]

Le Tue, Nov 15, 2022 at 04:04:05PM -0800, Michael Cheponis a écrit :
>[...]
> 
> I see other unexpected behavior; when I copy to identical files that are
> exactly 1/2 of 1.4 MB long
> # ll f1 f2
> 
> -rw-r--r--  1 mac  wheel  737280 Nov 15 02:53 f1
> -rw-r--r--  1 mac  wheel  737280 Nov 15 02:54 f2
> 
> Each of these is 1440 sectors (std 512-byte sectors); I know the diskette
> is 'perfect' (no defects), yet when I write both of these files to the
> mounted "/a" filesystem, only f1 gets fully written, and then it complains
> there's not enough room for f2:
> 
> # cp f2 /a
> cp: /a/f2: No space left on device
> arm64# ll /a
> total 2592
> -rwxr-xr-x  1 root  wheel  737280 Nov 15 08:06 f1*
> -rwxr-xr-x  1 root  wheel  589824 Nov 15 23:59 f2*
> 

Excuse me if que question is stupid, but is `a' (i suppose a 1.44MB
floppy device) an exactly 1.44MB device?
Because, for copying, one needs a filesystem; and the filesystem
metadata takes space. You can dd(1) exactly this amount; you can cp(1)
only less...

Or am I missing something?

Best,
-- 
        Thierry Laronde <tlaronde +AT+ polynum +dot+ com>
                     http://www.kergis.com/
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