Swapping A Host Adapter; Troubleshooting For Windows Nt Server - Dell 6100 User Manual

2. From the Options menu, 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.
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" 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" earlier in this
section for more information.
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.

Troubleshooting for Windows NT Server

The boot manager for Windows NT contains recovery
logic to allow you to return to the last known good
configuration. If you have changed your host adapter
configuration and Windows NT no longer boots, follow
these steps to recover:
1. Undo any hardware changes you have made to
the computer since it was last operational.
2. Reboot the computer. Watch the display carefully
during start-up. If the following message appears,
press the <Spacebar> and follow the instructions
on the screen to continue booting with the last
known good configuration:
Press spacebar NOW to invoke the Last
Known Good menu
3. Once your computer is operational again, check
all of the hardware and software configuration
changes you want to make. Look specifically for
conflicts with parts of the existing system configu-
ration that are not being changed.
If you cannot determine the source of the error, contact
Dell for assistance. See Chapter 11, "Getting Help," in
the Installation and Troubleshooting Guide for instruc-
tions on contacting Dell for technical assistance.
Installing and Configuring SCSI Drivers 3-9