Adding SCSI host adapters and peripherals

Adding a SCSI peripheral device

Use the Hardware/Kernel Manager or a mkdev(ADM) command (such as mkdev tape) to inform the system that you have added a peripheral device to the SCSI bus. This updates the system configuration files that are used in building a new kernel to support the new device:

/etc/conf/cf.d/mscsi defines the host adapter type, peripheral type, host adapter number, peripheral controller ID, LUN, and bus number for each device on every SCSI bus.
/etc/conf/sdevice.d/xnamex contains information about the hardware settings of each host adapter of type xnamex.

Supply the following information about the device to update the mscsi file:

Host adapter type (the internal name of the device driver for the host adapter). Supported types are listed in /etc/default/scsihas. For example, eiad is the driver for the Adaptec AHA-174x. If you have installed a host adapter driver using a BTLD, the host adapter type is the same as the name of the driver that you linked into the kernel.
Host adapter number. Use 0 for the first adapter of a given type, 1 for the second, and so on.
Peripheral's SCSI bus number. Use 0 for the primary bus, 1 for the secondary bus. This information is required for host adapters that control more than one SCSI bus, such as those that use the Adaptec 7770 chipset. The bus number for host adapters with only a single bus is 0.
Target ID of the device's controller. ID 7 is usually reserved for the host adapter.
Logical unit number (LUN). Set this to 0 for devices with embedded controllers.

If the disk is the first peripheral device that you are adding to the SCSI bus, you must also supply some of the following information about the hardware configuration of the host adapter (this information is used to update the file /etc/conf/sdevice.d/xnamex):

Interrupt vector (IRQ) (needed for ISA bus machines only).
Start I/O hexadecimal address (needed for ISA and some MCA bus machines).
End I/O hexadecimal address (needed for ISA and some MCA bus machines).

You are presented with the default values for the first host adapter of this type or the values for the previous host adapter of this type that was configured on the system. If you have changed the values physically set on the host adapter, you must enter these instead of the displayed values.

You are not prompted for configuration values for most EISA and PCI bus host adapters. These are assigned by the EISA or PCI configuration utility into CMOS RAM and read by the device driver at boot time.