Failed NetBSD 1.3 installation with CyberStorm MKII

[Georges Heinesch <ghmlist%ibm.net@localhost>]

I finally managed to install NetBSD 1.3 on my A3000 without CyberStorm
MKII. Unfortunately, since I have this card installed again, a new
problem showed up ;(

My system:

Amiga 3000 OS 3.1 (ROMs) - 16+2 MB RAM
CyberStorm MKII 128 MB RAM
CyberVision 64
Installation device : JAZ (verify after write disabled).

NetBSD 1.3 is started with "loadbsd -m32000 netbsd".

After the nfs installation (just before the *tgz files are installed),
the following message appears.

----- cut here -----
exec: mount_ffs /dev/sd0a /mnt
mount_ffs: /dev/sd0a on /mnt: Device busy

FATAL ERROR:  Cannot mount filesystems. Double-check your
configuration and restart the installation process.
----- cut here -----

What is this about?
How can I avoid it and continue the installation?

TIA

--
Cu  Georges Heinesch, Luxembourg
    geohei%ibm.net@localhost - geohei%geocities.com@localhost
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... Hakuna Matata ...