You'll want to boot the Windows NT setup disks or CD-Rom. Then *F6* very
early and very important (at setup is inspecting your system) in the setup
to prevent drive controller detection, and select S to specify additional
drivers. Then later you'll be prompted to insert the manufacturer supplied
Windows NT driver for your SCSI controller in drive "A"

If you wait and then S to specify additional drivers, then it may be too
late as Windows NT Setup at this point may have already assigned the
resources your drive's controller is wanting to use.

again I get the message that NT can't find my hard drive. It is a SCSI drive
installed by Dell. NT 4.0 finds the SCSI adapter but can't find hard drive.
All other diagnostics work find fine.

appreciated.

Try to boot from Dell system recovery CD (supplied with your server). Dell
CD will recover Dell service info on your computer and it will call NT setup
CD with modified setup procedure according to your hardware. You can use NT
server setup CD alone (to have more setup options), but you need to have
prepared at least driver floppy for disk controller and eventually also for
network adapter (in case of domain controller).

Be sure that your active primary partition is compatible with windows NT4,
NT setup behaves weird if it is not FAT16 or NTFS ver. 4 or in case it is
too long or other way inaccessible. Do not use Win2K or WinXP to prepare
partitions on your disk. Use Win NT setup (but it is limited to max 4GB
partitions) or preformat this disk as secondary in other machine running NT4
OS. Do not forget that the first partition (C:) should not exceed 7.8GB from
begin of disk. Also if you repartitioned disk in other machine, there is
probably none active partition set, so you should to boot from MS-DOS or
win9x system floppy, run fdisk and set your primary partition active before
setup.You can also make small first partition (at least 150MB, 300MB if you
need to apply SP, 500MB if you want to keep it on disk for service
purposes), install temporary OS instance to it and use this instance to
prepare rest of disk for main OS instance.

again I get the message that NT can't find my hard drive. It is a SCSI drive
installed by Dell. NT 4.0 finds the SCSI adapter but can't find hard drive.
All other diagnostics work find fine.

appreciated.