Devices

[Vizion]

Hi

I have previously reported an inability to get my amd Freebsd 6.1 system to recognize a drive and am wondering if it is because the relevant device node is not in /dev. having said that I am unsure of what I need to be looking for or how to create it.

here are the drives I have got:
(NB Physical Location is is what I use to identify  the machine bay in which it is located!)
Western Digital WD2000JD Physical location A SATA
ad0 is a Western Digital WD2000JB-00KFA0 08.05J08 Physical location B IDE ata-0master UDMA100
ad4 is a Seagate ST3160827AS 3.42 ata2 -master SATA150
acd0 is a CDRW <LITE-ON CD-RW SOHR-5239S/2s03> at ata0-slave UDMA33

CMOS reports
IDE Channel 0 Master WDC WD2000JB 
IDE Channel 0 Slave  LITE-ON CD-RW SOHR
IDE Channel 1Master [None] 
IDE Channel 1 Slave  [None]
IDE Channel 2 Master  [None]  
IDE Channel 3 Master  WDC WD2000JD
IDE Channel 4 Master  [None]
IDE Channel 5 Master  ST3160827As

In /dev I have ad0, ad0s1 & ad0s1a >thru e
ata
da0 & da1

I do not gave any others that appear to be relevant to drives.

Question is
1. What device node names need to be in /dev.
2. How do I create any missing ones.

I have looked at the man pages but I find them a bit terse for my understanding

Thanks

David