Apple Mac OS X Server System Imaging and Software Update Administration For Version 10.4 or Later Uživatelský manuál stáhnout pdf (Strana 20)

20 Chapter 1 About System Imaging Administration

BootP Server

NetBoot uses a BootP server (bootpd) to provide necessary information to client

computers when they try to boot from an image on the server.

If you have BootP clients on your network, they might request an IP address from the

NetBoot BootP server, and this request will fail because the NetBoot BootP server

doesn’t have addresses to offer. To prevent the NetBoot BootP server from responding

to requests for IP addresses, use NetInfo Manager to open the NetBoot server’s local

NetInfo directory and add a key named bootp_enabled with no value to the directory

/config/dhcp.

Boot Files

When you create a Mac OS X NetBoot image with System Image Utility, it automatically

generates three boot files and stores them on the NetBoot server in /Library/NetBoot/

NetBootSPn/image.nbi (where n is the volume number and image is the name of the

image). These files are:

Â booter

Â mach.macosx

Â mach.macosx.mkext

Note: If you enable NetBoot services when installing Mac OS X Server, the installer

automatically creates NetBootSP0 share point on your server’s boot volume. Otherwise,

you can set up NetBootSPn share points by choosing the volumes in which to store

NetBoot images from the list of volumes in the General pane of the Settings pane of

NetBoot service in Server Admin.

Trivial File Transfer Protocol

NetBoot uses the Trivial File Transfer Protocol (TFTP) to send boot files from the server

to the client. When you start a NetBoot client, it sends out a request for startup

software. The NetBoot server then delivers the booter file to the client via TFTP default

port 69.

Client computers access the startup software on the NetBoot server from:

/private/tftpboot/NetBoot/NetBootSPn

This path is a symbolic link to Library/NetBoot/NetBootSPn/image.nbi (where n is the

volume number and image is the name of the image).

Using Images Stored on Other Servers

You can store Mac OS X boot or install images on NFS servers other than the NetBoot

server itself. For more information, see “Using Images Stored on Remote Servers” on

page 46.

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Apple Mac OS X Server System Imaging and Software Update Administration For Version 10.4 or Later Uživatelský manuál Strana 20