randomizing install medium


I am tying to revive an old lappy with FreeBSD. It is a Thinkpad t41, single core, ships with max 2 GB Ram.

Tried to install FreeBSD with ZFS, but despite a successful install, the thing would not boot again ( read somewhere that ZFS is a bit cranky in 32 bits systems ), so I went for UFS.

Found a nice tutorial on how to install FreeBSD over encrypted UFS.

What I would like some help with, is with completely randomizing the install medium, prior to making the install. Should the lappy be lost/stolen , no one would have a clue in distiguishing data blocks from empty space.

things like dd if=/dev/(u)random of=/dev/ata0 are hoplessly slow,

How do I use the OpenSSL to speed this up ...???


openssl enc -aes-256-ctr -pass pass:"$(dd if=/dev/urandom bs=128 count=1 2>/dev/null | base32)" -nosalt < /dev/zero | dd of=/dev/ata0

doesn't work...

Best regards,