1. You can use "df -v" to view all mounted partitions. I am using OpenServer 505/506 but I think "df" is the same among all UNIX OS.
2. Pls refer to your system man page on the command mount, type "man mount". I have exp on Linux to mount a FAT32 partition, it is "mount -t vfat /dev/hda1 /mnt/C". It may give you an idea but won't be the same in UnixWare. So pls man mount, it will also tell you which filesystems it supports.
Hope these help you.