Disabling Command Queuing - Intergraph InterServe 05 Setup Manual

Do this before inserting a PC Card hard disk device in the PC Card drive. If you do not,
anomalous behavior may result -- for example, the PC Card hard disk drive may not be
detected by Windows NT Server, or may be detected as the system drive (drive C).
To change startup type for device drivers that control PC Card hard disks:
1. Open Devices in the Windows NT Control Panel. The Devices dialog displays.
2. Highlight the device in the Device list; then select Startup. The Device dialog displays.
3. Under Startup Type, select the appropriate startup type; then select OK.
4. In the Devices dialog, select Close.
Additionally, some PC Card devices require that specific system resources be reserved for
proper operation. If so, run the System Configuration Utility (SCU) to reserve the resources;
see the System Reference for more information. Refer to the documentation supplied with
your PC Card device for information about the required system resources.

Disabling Command Queuing

To improve standalone system performance and to improve performance with some high-
performance SCSI peripherals, you should disable command queuing in the Windows NT
Registry.
WARNING Do not change values in the Registry other than as directed. If you introduce incorrect
values into the Registry, you may cause serious operating system problems, and you
may have to re-install Windows NT. If you change values in the Registry that make your
system unusable, you may be able to restart the system and use the Last Known Good
Configuration option to undo the damage. Refer to the Windows NT Server Installation
Guide for more information on the Last Known Good Configuration option.
To disable command queuing:
1. Start the Registry Editor (
2. Open the following subkey in the Registry:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\aic78xx
3. From the Edit menu, select the Add Key.
4. Type Device into the Key Name box, and then select OK. Do not set a Class value.
Open the following subkey in the Registry:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\aic78xx\
Device
5. From the Edit menu, select Add Value.
. ) to open the Registry.
REGEDT32 EXE
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