There are two things you can try: Please have a good known backup if you can as these 2 fixes are the change the registry.Ensure that a complete backup of the system has been performed and an Emergency Repair Diskette (ERD) has been created before proceeding with this Resolution.
----------------------------------------------- Remove or rename the LunRescan subkey value.
In the Windows NT Registry, under the HKLM/System/CurrentControlSet/Services/Disk a subkey includes a value labeled LunRescan.
The Compaq 32-Bit SCSI Controller installation file adds this value.
The purpose of the entry is to allow non-zero LUNs to be rescanned each time the SCSI bus is scanned by a program. As a result, an external device such as a DAT tape autoloader has non-zero LUNs powered on after the operating system is running. External devices with non-zero LUNs are included in all scans of the SCSI bus assuming that the device was powered on before the operating system booted. If the LunRescan entry is removed, non-zero LUNs will not be included in SCSI rescans.
The entry can be removed, or renamed (for example #LunRescan). Either removing or renaming the entry will eliminate scanning of new non-zero LUNs during a rescan process and eliminate an enormous amount of commands to the DAT tape autoloader.
In most cases, this will also eliminate the Event ID 15 error messages. Note: Reinstalling or updating the Compaq 32-Bit SCSI Controller driver will also reinstall this registry value. Each time the Compaq 32-Bit SCSI Controller driver is updated, the Windows NT registry key for LunRescan must be manually removed or renamed. Start ArcServe manually. This will prevent the Compaq Survey Utility for Windows and the Compaq Server Agents for Windows from an I/O traffic conflict with ArcServe during operating system startup.
