Here are some possible configurations for systems
containing multiple hard disks:
Root disk on the primary SCSI host adapter:
only other SCSI host adapters can be added.
Each host adapter, including the primary, is capable of
supporting up to seven disk drives with embedded controllers
on a SCSI 1 bus, and up to 15 on 16-bit-wide
SCSI 2 bus.
Root disk on an IDE, EIDE,
or ESDI controller:
ISA, EISA, and MCA bus machines can
support up to two IDE or EIDE controllers.
Each controller can support two disk drives.
SCSI host adapters can also be added and configured as shown in
Figure 18-1.
Root disk on a Compaq IDA-III controller:
a maximum of five more IDA-III controllers can be added.
Each controller can support 14 disk drives.
To install an IDE, EIDE, ESDI,
or IDA disk, follow the procedure in
``Installing a hard disk''.
For SCSI disks, first set up
the SCSI configuration files and link the correct
device drivers into the kernel using the Hardware/Kernel Manager
or mkdev hd as described in
``Configuring a SCSI hard disk''.
Then proceed to
``Installing a hard disk'',
where you invoke the same command a second time
to partition the disk and make the filesystems.
Figure 18-1 Example of a mixed ST506-interface disk controller and SCSI configuration
NOTE:
Configure the hardware according to the
documentation provided with your machine.
EISA bus machines have a configuration utility to do this;
ISA machines require you to change jumper settings
on the hardware.
SCSI hard disks must have the correct target
ID set on their controller card. The SCSI
bus must also be correctly terminated at both ends.
Ensure that the additional drive is formatted and
passes the manufacturer's diagnostic tests before
installing the system. If it does not pass the diagnostic
tests, you should not use it with your system.
