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Although many PCs can boot from the same boot image file, it is likely that more than one
boot image file will be required to suit the differing needs of the PCs on your network,
especially if different operating system versions need to be supported. Supporting multiple
boot images requires an understanding of three important issues:
Creating/editing the BOOTCONF.SYS boot index file
Avoiding AUTOEXEC.BAT conflicts in SYS:LOGIN
Using Boot Image Editor to create different boot images
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The default boot image file is NET$DOS.SYS. When you need to support more than one boot
image file, you must name these files in a special boot index file called BOOTCONF.SYS.
The BOOTCONF.SYS file is an index of all the boot image file names and the network address
and node address of each PC that must access those files. This file must be in the
SYS:LOGIN directory.
MBA (or the MSD NLM, if loaded) scans the contents of BOOTCONF.SYS during PC boot, and
if no entry is found which matches the PC's network and node address, the default boot
image file is used.
The BOOTCONF.SYS file may be created and edited in the following ways:
Using the BOOTEDIT utility (provided with MBA) ensures correct syntax, offers
search/sort capabilities, and other helpful features. BOOTEDIT must be used when
loading the optional MSD NLM. See “
Multiple Servers: How the MSD NLM Can Help .”
Using an ASCII editor (such as the MS-DOS editor, EDIT). This is recommended only
in emergencies, or when BOOTCONF.SYS contains only a few entries. Avoid using EDIT
when MSD is being used, because BOOTCONF.SYS must be sorted.
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BOOTEDIT is the BOOTCONF.SYS editor supplied with MBA. This editor hides all
BOOTCONF.SYS syntax requirements and offers helpful features such as searching, sorting,
undo, automatic address insertion, and more. BOOTEDIT conforms to the extended
BOOTCONF.SYS syntax requirements of the MSD NLM options supported by MBA.
BOOTEDIT has the following syntax:
Usage: bootedit [servername] [/mono]
If the file server name is omitted, the current file server is used. BOOTEDIT automatically
detects monochrome screen modes, but this mode may be forced with the “/mono”
parameter. BOOTEDIT uses the full height of a screen or window (i.e. 43 rows); the
minimum required size is 80x25 characters.
When BOOTEDIT loads BOOTCONF.SYS, any errors detected in the data format are displayed
and BOOTEDIT will not enter the edit mode. If any PC entries with comments over 40
characters long are found, a warning is displayed.
BOOTEDIT has a capacity of approximately 3,000 records, depending on the amount of free
conventional memory.