I'm trying to get all my backups to use fss snapshots. To do this I
would like to associate each file system to be backed up with a specific
fss device. But there are only four. If I MAKEDEV a new one or two
fssconfig -l tells me this...

# fssconfig -vl
fss0: not in use
fss1: not in use
fss2: not in use
fss3: not in use
fssconfig: open: fss4: Operation not supported by device

How can I bump up the maximum number of working fss devices?

Thanks,

Louis