how can I know the new hardware is installed driver
 

Dears,

How can I know the new hardware is installed the driver? Now I am using the RH7.3. Actually, the case of me is installed Rh7.3 and using array raid card(This raid card have 2 channels). After the installation, I install another one Ultra SCSI 2 controller card and attached the AIT tape drive for backup use. How can I know the new SCSI is installed properly? And if scsi card is ok, how can I test the AIT tape drive? If use mount, how can I mount it? It is because I have two scsi controller cards and how can I define the device (/dev/sxx)? I look forward and hearing from you soon! Thanks a lot!

I would suggest you reinstall Linux. Installing Linux driver/module isn't easy.

I would also suggest you go to your hardware's Website for Linux drivers/help.

If you take a look at this, you might find something:

su
less /var/log/messages
lspci
lsmod

Logs are in /var/log/messages. You can read last start messages (among other things - SCSI start) and see if everything looks correctly.

How are the devices named when you have many controllers? IMHO, when you have 6 devices, 2 controllers, every controller with 3 devices it's:
devices connected to 1st controller: /dev/sda, /dev/sdb, /dev/sdc
devices connected to 2nd controller: /dev/sdd, /dev/sde, /dev/sdf