Iam use ubuntu 9.04. First, you need to find out what the name of your BSD partition is under Linux. This will show what Linux thinks is a BSD (UFS2) partition:
root@ubuntu:~# dmesg | grep bsd
[4294675.513000] hdc2: <bsd: hdc9 hdc10 >
[4294675.530000] hdc3: <bsd: hdc11 hdc12 >
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