End User Support:Windows NT/2000
Server Upgrade: Win
NT To Win 2000
Choosing the upgrade path, rather than installing Windows 2000 from scratch, is the easiest
option when a server is already set up and running on a network. However, there are certain
precautions you should take before proceeding.
By Dave Cook
F
irst, the good news: the vast ma
cally, there are two options to consider:
To fully take advantage of Active
jority of upgrades from Win
whether to retain the existing domain
Directory, Microsoft advises fewer
dows NT Server to Windows
structure, or whether to consolidate
and larger domains. So a good reason
2000 Server proceed without a hitch.
the domain structure so that the net
to implement the restructuring proc
Although installation is a lengthier
work architecture can be tailored to
ess before the upgrade would be, for
process than with Windows NT, a
suit your company's requirements.
example, when the design of Active
much improved setup streamlines the
Bear in mind, however, that there is no
Directory calls for only two domains
upgrade significantly.
reason to restructure an organisation
and yet your company presently has
All the same, even the most experi
that contains only one domain.
four. Eliminating the two extra do
enced NT administrators would do
Retaining the existing domain
mains would simplify the upgrade
well to familiarise themselves with the
structure is by far the easiest option,
and deployment of Active Directory.
installation routine before attempting
because it avoids having to upgrade all
Be warned, though, that restructur
the real thing. There are important de
of the operating systems included in
ing domains beforehand is no easy
cisions to be made, both before and
the domain in one fell swoop. Besides,
task. Points to look out for include the
during the upgrade, that will directly
the typical Windows 2000 Server will
following:
affect the performance and reliability
be perfectly happy in a mixed net
of the machine.
working environment that supports,
G
The recommended size limit of the
While Windows 2000 is more
for instance, Windows 2000 Profes
Security Account Manager (SAM)
power hungry than Windows NT, it is
sional, Windows NT 4.0 and Windows
is only 40 MB. But companies with
also more adaptable. Minimum re
9x.
a large assembly of users, groups
quirements include a 133 MHz Pen
In the majority of situations, imple
and computers will already have a
tium compatible processor, 256 MB of
menting the restructuring process is
large SAM; in which case, do not
RAM (128 MB min, 4 GB max), plus at
best performed later, after the up
combine domains if their united
least 1 GB of available hard disk space.
grade, and once any minor problems
SAM databases will be greater than
Up to four CPUs are supported on one
have been eliminated. The benefits of
40 MB.
server.
restructuring under Windows 2000 in
G
Even if the size of the combined
clude the capability to move domain
SAM database is less than 40 MB, it
Restructuring
controllers between domains without
follows that SAM replication traffic
reinstalling the OS. In most cases, the
will inevitably increase. Always
Administrators can choose whether
only work required in the resource do
verify beforehand that the network
to upgrade member servers before up
mains beforehand will involve mov
can actually handle this upsurge.
grading domains, or vice versa. If
ing applications and services from
G
Certain domains may have been
member servers are upgraded first
domain controllers to member servers.
specifically created to delegate ad
then a variety of features become
ministrative tasks. It stands to rea
available, though none that require the
Active Directory
son, therefore, that eliminating
new directory service, Active Direc
these domains will disrupt the sys
tory. Note that, when upgrading do
Although Active Directory can be
tem.
main controllers in an existing NT
implemented at any time after the up
domain, the primary domain control
grade, careful planning of its design is
For further information regarding
ler (PDC) must be upgraded first.
vital from a very early stage. Under
the restructuring of domains, adminis
Certain decisions need to be ad
certain conditions, therefore, it may be
trators will find Microsoft's Windows
dressed concerning the structure of the
better to restructure domains before
2000 Server deployment guide ex
domain about to be upgraded. Basi
hand.
tremely useful. The guide is available
PC Network Advisor
Issue 120 (July 2000) page 9
File: E1721.1
www.itp journals.com
<< < GO > >>
New! The best sites for quality inkjet printer cartridges and the best sites for cheap inkjet cartridges