Removing A Host Adapter; Swapping A Host Adapter - Dell 2100 User Manual

15. When you see the following message, click OK to
exit:
The changes you have made will not take
effect until the computer is restarted.
If this message does not appear, no changes have
been made to the Windows NT system
configuration.
16. Restart your computer and Windows NT. Some
drive letter assignments may have changed from
the previous configuration.

Removing a Host Adapter

Removing a PCI expansion-card SCSI controller is as
simple as physically removing it from its slot when your
computer is shut down. Windows NT boots and functions
properly in this configuration, but a warning message is
generated every time you boot Windows NT.
CAUTION: If you have removed a host adapter
but still have other host adapters of the same type
installed in your computer, do not use Windows NT
Setup to remove the device driver.
To eliminate the warning message, you must update the
Windows NT software configuration as follows:
1. Select and start the Windows NT Setup program.
There is a brief pause while Windows NT Setup
scans your hardware configuration.
2. Select the Options pull-down menu, and then
select Add/Remove SCSI Adapters. The SCSI
Adapter setup program displays a list of all host
adapters currently installed.
3. Select the host adapter you want to remove, and
click Remove. When the Windows NT Setup pro-
gram asks you for confirmation, click OK.
Because SCSI device drivers are loaded during sys-
tem start-up and because they may be needed to load
Windows NT itself, a screen may appear warning
you that Windows NT may not start if you remove
the SCSI adapter.
4. When you are sure you are removing the correct
host adapter type, click OK.
3-28 Dell PowerEdge 2100/180 and 2100/200 Systems User's Guide
5. Return to step 3 if you want to remove driver sup-
port for other types of host adapters, or click
Close to exit the SCSI adapters portion of Win-
dows NT Setup.
6. Close the Windows NT Setup program. When the
following message appears, click OK to exit:
The changes you have made will not take
effect until the computer is restarted.
If this message does not appear, no changes have been
made to the Windows NT system configuration.
7. Restart your computer.
NOTE: The Windows NT Setup program does not delete
the device driver from your hard-disk drive; it only
updates Windows NT software configuration information
so that the device driver is no longer loaded during sys-
tem start-up.

Swapping a Host Adapter

The procedure for swapping one type of host adapter for
another is similar to the procedure for adding a host
adapter, except that you make all software configuration
changes while Windows NT is running, before you make
the hardware changes.
1. Install the driver for the new host adapter by fol-
lowing the steps in "Installing or Updating the
Driver With Windows NT 3.51" found earlier in
this section.
It is not essential to remove the device driver for the
host adapter you are replacing. Windows NT dynam-
ically detects the absence or presence of host adapter
hardware, and no problems should arise if you leave
the existing device driver installed. You can remove
the device driver later, after you have successfully
rebooted Windows NT. However, if you leave the
driver in, the system alerts you with an error mes-
sage about the extra device driver every time you
boot. See "Removing a Host Adapter" found earlier
in this section.
2. Once the new device driver is installed, shut down
Windows NT and replace the existing host
adapter.
3. Restart your computer and Windows NT. Some
drive letter assignments may have changed from
the previous configuration.