Ciprico Rimfire 3880 manual Step Configure Connect Scsi Devices, Selectable Options

Chapter 3 Hardware Installation

Page 3 - 14 Step 5: Configure and Connect SCSI Devices

Step 5:

Configure and

Connect SCSI

Devices

Selectable

Options

The RF3880 can communicate with any SCSI device that adheres to the SCSI Common Command Set. Each separate device on the SCSI bus must have a unique SCSI ID and be properly terminated. In addition, it may have a self-test sequence or options and parameters that you should know about.

You will need to examine the documentation that arrives with your selected peripheral for more information. This section outlines what to look for.

Each peripheral vendor can choose a unique way to assign a SCSI ID and enable/disable options. The two most common methods are: jumpers and switches.

You will need to find the section in your peripheral documentation that explains how to set the options.

SCSI ID

You will need to decide which SCSI ID to assign to your peripheral(s). Bus access priority is given to a device based on the SCSI ID it is assigned. The SCSI ID’s zero to seven have higher priority than eight through 15, and priority descends from seven to zero, and 15 to eight. See the SCSI 3 specification for more information on this. Each device on the SCSI bus (including the RF3880) must have a unique SCSI ID. The factory-set ID for the RF3880 adapter is zero.

Options

Your device may also have a means to select options such as: termination power source, automatic spin-up, or parity checking.

Termination Power: If your hard disk is the last peripheral on the SCSI bus, it will need to have terminators installed. Some hard drives allow you to select whether the terminators will get power locally, on the drive, or use the termination power available on the SCSI cable. Setting up the drive to provide its own terminator power is the most universal solution. The RF3880 provides TERM PWR on the SCSI cable.

Automatic Spin-up:Some disk drives allow you to delay spin-up of the disk media until a SCSI command is issued to spin it up. The advantage to this is that it cuts down the power draw when the system is initially turned on.

Parity Checking: The RF3880 is flexible enough to allow you to use SCSI bus parity checking or disable it. If you wish to use it, parity checking must be enabled on each peripheral and also enabled using the General Options command explained in Chapter 7. Note that all devices on the SCSI bus must be setup for parity the same way.

You can select a power-up/reset default for parity checking with pins 5 and 6 of the SCSI Configuration Jumper Block. The value you use in the General Options command overrides the jumper setting, so you should be sure that they match. (You would install a jumper over the pins to disable parity checking.) Moreover, you can use the Board Information Board-controlcommand to discover the current setting of the parity jumper without removing the board. See Chapter 7 for more information on Board-control commands.

Termination The devices at each physical end of the SCSI bus cable must have terminating

21020285 D User’s Guide