dd significa driverdisk, na verdade, no fedora é o driverdisk.
> driverdisk <partition> --source=<url>
> --biospart=<biospart> [--type=<fstype>]
>
> *
> <partition> — Partition containing the driver disk.
> *
> <url> — URL for the driver disk. NFS locations can be given in the form
> nfs:host:/path/to/img.
> *
> <biospart> — BIOS partition containing the driver disk (for
> example, 82p2).
> *
> --type= — File system type (for example, vfat or ext2).
Você pode fornecer até mesmo um recurso de rede:
driverdisk --source=ftp://path/to/dd.img
driverdisk --source=http://path/to/dd.img
driverdisk --source=nfs:host:/path/to/img