# fstyp -v /dev/dsk/c0t1d0s2
hsfs
CD-ROM is in ISO 9660 format
System id:
Volume id: HIMITSU9
Volume set id: UNDEFINED
Publisher id:
Data preparer id:
Application id:
Copyright File id:
Abstract File id:
Bibliographic File id:
Volume set size is 1
Volume set sequence number is 1
Logical block size is 2048
Volume size is 2186727

あれ？hsfs？？
# mount -r -F hsfs /dev/dsk/c0t1d0s2 /tmp/dvdrom
hsfs mount: /dev/dsk/c0t1d0s2 は hsfs ファイルシステムではありません。

(´･ω･`)ｼｮﾎﾞｰﾝ