Specifications

Disk duplexing
With two or more SCSI adapter cards installed in your file server,
each with a hard disk drive attached, you can perform disk
duplexing.
Mirroring and duplexing actually refer to the same process. If the
hard disk drives are attached to the same SCSI adapter card, the
process is called mirroring. If the hard disk drives are attached to
different SCSI adapter cards, the process is called duplexing.
The disk attached to one SCSI adapter card mirrors the disk
attached to the other SCSI adapter. In this case, if you have a
problem with either a disk or a SCSI adapter card, you can
continue to work from the duplexed subsystem without
interruption. This keeps network down-time to an absolute
minimum.
/-
TERMINATORS
INSTALLED
7
SCSI ADAPTER CARD
SCSI
-
PORT ADDRESS 330H
DISK 0
386
SCSI BUS
SCSI ADDRESS CARD
J-
SCSI
PORT ADDRESS 334H
DISK 0
l Disks contain same data
l Host adapters at different port
address/lRQDMA
l Driver must be loaded twice
‘\_TERMINATORS I
INSTALLED
The NetWare operating system refers to both mirroring and
duplexing as mirroring. The INSTALL program displays the
mirroring status of a drive as either Mirrored or Not Mirrored.
Note
If you install different types of SCSI adapter cards, you need to install
the ASPITRAN.DSK driver.
6-10
Installing Software Drivers for Novell NetWare 286/386