Using The Hot Plug Function With Raid Host Drives; Installation Of A New Gdtx.sys Driver Version; Installation Of A Removable Hard Disk - ICP RS Series User Manual

At the next system boot the ICP driver is loaded and the existing Host Drives are ready to
be partitioned under Windows NT.
F.2.3 Using the Hot Plug Function with RAID Host Drives
In order to be able to use the Hot Plug function under Windows NT, you my either use ICP
RAID Console or ICP RAID Navigator.
F.2.4 Installation of a new GDTX.SYS Driver Version
If it should become necessary to install a new version of the GDTX.SYS driver, the proce-
dure is as follows:
Double click the My Computer icon.
a)
Double click Control Panel.
b)
Double click SCSI Adapters.
c)
Click on Drivers.
d)
Select GDT SCSI Disk Array Controller.
e)
Click on Add.
f)
Click on OK.
g)
Windows NT informs you that this driver is already on the system and asks if you
want to use the currently installed driver or a new one.
Click on New and insert the ICP Windows NT driver disk.
h)
Click on Continue and NT copies the new driver to the disk.
i)
At the next system boot the ICP driver is loaded.
F.2.5 Installation of a Removable Hard Disk
Removable hard disks (e.g., SyQuest, IOMEGA or magneto optical devices, MODs) are con-
trolled by the ICP Controller in two fundamentally different modes:
Mode 1: The removable hard disk is treated like a normal hard disk. The data passes
through the cache of the ICP Controller and the media needs to be initialized with ICPCON.
Mode 2: The removable hard disk is handled as a Raw Device. This means that the removable
device is directly controlled by Windows NT without any further interaction of the control-
ler. Consequently, the data is not cached by the ICP cache and the media does not need to
be initialized with ICPCON. The advantage of mode 1 lies in a decisively better performance
due to caching. On the other hand, the relatively complicated procedure of media changing
presents a disadvantage. The opposite is true when adopting mode 2: The media change is
easy and the media are compatible with other disk controllers (e.g., NCR). The performance
is rather low since the data cannot be cached on the ICP Controller. To install a removable
hard disk as a Raw Device, the media must not be initialized with ICPCON and the device
must be set to a SCSI-ID equal to or greater than 2. In addition, the parameters of the ICP
driver GDTX.SYS need to be configured differently in the Windows NT Registry
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\gdtx\Parameters\Device
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