Thanks for your follow.

> > I assign only 65536 blocks, but 'df' says 504952 blocks.
>
> Where did you only asign 65536 blocks?

With 'APS', which is a hard-disk utility, I made some partition on
my hard-disk;  I assign 32KByte to 'sd0a'.  32KByte is consisted in
65536 512byte blocks.

> The negative amount of free space reflects the fact you're doing
> stuff as root. The "100%" level is really 90% of the disk..

Yes, I know.

> How big is the partition really?

As wrote above, 32Kbyte, 512 byte per bloc.

> use the Mac-side utilities.

Occasionally I met same result after doing 'Mkfs' on Mac-side.

I will try again.

-------------------
Mamoru Yamanishi <yama@biotech.okayama-u.ac.jp>
+81-86-251-8196(voice) & +81-86-253-7399(GIII type FAX)
Biotech. Dept., Okayama Univ.