Re: cdrom: "df" != real size ?

Aaron Ucko (UCKO@vax1.rockhurst.edu)
Wed, 29 May 1996 15:27:14 -0600 (CST)


>:: when I type df I see:
>::
>:: venus:~# df
>:: Filesystem 1024-blocks Used Available Capacity Mounted on
>:: /dev/hda2 985329 493077 441348 53% /
>:: /dev/scd0 94 94 0 100% /cdrom
>::
>:: this does mean that there are 94x1024x1024 bytes = 94MB on CD?
>
>: Actually, it appears to mean that there are only 94 KB on the CD.
>: Something seems fundamentally wrong there---perhaps the CD gives
>: misleading information somewhere.
>
>Not necessarily. I once got a CD with 8 KB on it - just for free,
>with some advertizing on it. Not every CD has 600MB of useful data.

True -- AOL CDROMs use only 1 or 2 MB -- but even tar isn't inefficient
enough to turn 94 K into several hundred megabytes!

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