All drives not being recognized - new drive seems to have bumped oneof the others

Running XP Home and a Soyo SY-P4I865PE Plus DRAGON 2 v1.0 mobo. The
system previously had 1 DVD drive, 1 floppy, 1 IDE drive (the C
drive), 1 SATA secondary drive, and 3 USB 2.0 drives which I use
mostly for storage and are normally not turned on. System recognized
all of these drives, no issues accessing any of them.

I added another internal IDE cabled in series with the C drive. I
noticed when booting the system with the new drive, it didn't give me
a "system configuration changed" message at the POST which has always
been the case previously. It booted normally. It now calls the new H/D
"F" which was formerly assigned to one of the USB drives and is now
ignoring one of the previously recognized USB 2.0 drives. As far as I
can tell, the MOBO is supposed to support as many drives as I have.

Any suggestions as to what the issue is?

Thanks for all input.

 

Yeah, its done what its supposed to do and assigned a drive letter to
the internal hard drive over the external ones.

If you go into Disk Management, you can assign the "missing" USB2 drive
a letter.

 

It doesn't show up in Administrative Tools > Computer Management >
Disk management. It's not there. The only place I find any indication
it's attached to the computer is under Computer Management > Universal
Serial Bus controllers, shows up as "Unknown device". No option to
name or rename it.

 

Tried a different USB port, now it's being recognized and
automatically assigned a letter. Hmmm..