newfs_sysvbfs builds a System V boot file system on the specified special. If it is a device, the size information will be taken from the disk label and before running
newfs_sysvbfs the disk must be labeled using
disklabel(8); the proper fstype is “SysVBFS”. Otherwise, the size must be specified on the command line.
The following arguments are supported:
-F
Create file system to a regular file.
-s sectors
Create file system with specified number of disk sectors.
-Z
Fill file with zeroes instead of creating a sparse file.