Adding hard disks

Adding secondary hard disks

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 a 16-bit Wide SCSI-2, Ultra-SCSI (SCSI-III), or Ultra2SCSI bus.
Root disk on an IDE, EIDE, UDMA or ESDI controller: ISA, EISA, and MCA bus machines can support up to two IDE, EIDE, or UDMA controllers. Each controller can support two disk drives. SCSI host adapters can also be added and configured as shown in ``Example of a mixed ST506-interface disk controller and SCSI configuration''.
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 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.

To install USB disks, see ``Configuring a USB hard disk'', then proceed to ``Installing a hard disk''.

To install IDE disks, see ``Configuring IDE disks and disk controllers'' then follow the procedure described in ``Installing a hard disk''.

To install EIDE, UDMA, ESDI, or IDA disks, follow the procedure described in ``Installing a hard disk''.

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.