PERC's do not support non-RAID (JBOD), so whether you want them mirrored or not, you must configure the drives in the PERC BIOS (CTRL-M) ... or turn it off and use the system's SCSI-only controller. If you want to use the drives as separate/individual drives, you need to configure each drive as a single-disk RAID 0. If you want to turn off RAID and use them in SCSI-only mode, then you will need to boot to the BIOS Setup (F2), Integrated Devices, and set Embedded RAID to SCSI Enabled. The fact that POST says 0 Logical Drives found indicates that the drives are not configured - remember, the drives must be configured in some sort of array before they are usable by the OS.  So, it should be showing at least one logical drive before installation can ever be successful. Once RAID is configured, then you will need to worry about drivers.
I'm having some problems with this and it driving me nuts. This is the 1st Rackmount Dell I have worked on. Other then that I worked on a tower. But the part that I have not done anything with is SCSI hard drives. So maybe someone here can help me. I got a Dell PowerEdge 1750, it has 2 Maxtor 36GB SCSI drives in it. The server was using RAID to mirror the main drive before it was wiped and replaced. So now the server is to be setup with Linux and it does not matter if the drivers are mirrored in RAID at all. So I tried installing Ubuntu server OS and it keeps saying it can't find the drivers for the hard drives. I tried some drivers here at DELL that were for Red Hat and it didn't work. I then tried a copy of Red Hat Linux 8.0 and got the same problem that Ubuntu gave me. So  getting fed up, I tried a copy of Windows XP Home that was sitting by a retired workstation. Same problem, Windows couldn't find the hard drives. I download the PERC 4/Di drivers for windows server 2000 and 2003 (x84). Tried loading them to see if the drivers would allow me to install the OS or not. Never worked. Last try, I popped a copy of Windows Server 2003 R2 Enterprise Edition in and it had the same problem as XP, so I pop the  PERC 4/Di drivers in and picked the driver for Windows Server 2003 and it still didn't find the hard drives. What am I doing wrong ?   POST INFO: Embedded Server Management Firmware Revision 1.80 Primary Backplane Firmware Revision 1.01 PowerEdge Expandable RAID Controller BIOS B109 Feb 18, 2003 PERC 4/Di Standard FW 4.04 0 Logical Drives found on host adapter 0 Logical Drive(s)  handled by BIOS Broadcom NetXtreme handled by BIOS Boot Agent V7.0.3   I not sure if that noraml or not, I do think it funny it finds 0 Logical Drives but when you go into the configuration they both show up in there.
Can't get any OS to install on PowerEdge 1750