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The ICP Controller and the Host Drives previously configured with GDTSETUP are integrated
by means of GDT's driver software located on the GDT
Novell NetWare
disk. The driver be-
longs to the category of the so-called NLMs (NetWare Loadable Module).
GDTRP400.DSK
for NetWare 4.x
ASPITRAN.DSK ASPI
manager
CTRLTRAN.DSK
Module for GDTMON
(Note: More information about the GDTMON diagnosis tool may be found in a separate
chapter in this manual.).
If you wish to install NetWare 4.x from a CD-ROM, you first have to set up the CD-ROM
drive under MS-DOS, following the instructions given in chapter D, section D.6. Then install
NetWare following the instructions in the NetWare documentation. During the installation,
the NetWare installation program asks you which hard disk driver you want to load, showing
a list of available drivers. As the GDT driver is not part of this list yet, you have to boot it
from the floppy disk: insert the GDT
Novell NetWare
disk into the floppy drive. Now, select the
drivers GDTRP400, ASPITRAN and CTRLTRAN. Complete the installation according to the
instructions given by the NetWare installation program.
Naturally you can also load the GDT driver directly from the system console, just as with
NetWare 3.x:
:LOAD GDTRP400 <ENTER>
(ASPITRAN.DSK and CTRLTRAN.DSK will be loaded automatically ). If more ICP Controllers
are installed in the fileserver (i.e., for controller duplexing), the above mentioned driver has
to be called upon several times. But as it is re-entrant, it is only loaded once. A single ICP
Controller can be chosen by selecting its PCI slot number.
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High performance SCSI controllers are designed for multi-I/O operations and are capable of
processing several I/Os simultaneously. Especially cache controllers with powerful on-board
RISC CPUs can handle several hundred I/Os per second. NetWare offers the option of ad-
justing the number of write I/Os which are loaded on the mass storage subsystem. In order
to gain optimum performance and speed from modern high performance disk controllers,
the amount of the so-called 'maximum concurrent disk cache writes' has been increased
with every further development of NetWare. Looking back to NetWare 3.11, only 100 'con-
current disk cache writes' were possible. With NetWare 4.10, this can be as much as 1000.
The number of concurrent disk cache writes delivering the best performance is highly de-
pendent on the performance of the installed disk controller, the amount of cache RAM on
the controller and the hard disks. The ICP Controllers can easily cope with up to 500 simul-
taneous requests. The following command line enables the adjustment of a new number
under NetWare (default value = 50):
set maximum concurrent disk cache writes = xxxx
where xxxx represents the required number of concurrent disk cache writes.
