ShowSCSI is an application which lists the SCSI devices connected to your Macintosh. It is primarily used when adding a new SCSI device. If you are not adding a new SCSI device, you do not need to use ShowSCSI.
• Hardware Requirements
ShowSCSI runs on any Macintosh which has a SCSI port. This includes all models except those introduced before the Macintosh Plus. You should have at least one SCSI device connected to your Macintosh to use ShowSCSI.
• Installing ShowSCSI
To install ShowSCSI, drag the ShowSCSI icon on to your hard disk. Since ShowSCSI is an application, it can be placed in any folder; it does not have to reside in the System folder.
• About SCSI Devices
SCSI (pronounced "SKUH-zee") is short for Small Computer System Interface, which is a standard for computer devices to exchange data. The SCSI standard allows up to eight devices to be interconnected through a common SCSI chain. Typical SCSI devices include computers, hard disks, tape drives, scanners, CD-ROM drives, and printers.
Each device on the SCSI chain is assigned a unique ID number from 0 to 7. The method for assigning the device ID varies. Some devices require setting switches or jumpers while others are assigned through software. IT IS IMPORTANT THAT TWO DEVICES IN A SCSI CHAIN DO NOT HAVE THE SAME ID NUMBER; OTHERWIZE THE CHAIN WILL NOT OPERATE PROPPERLY, AND THERE IS THE POTENTIAL FOR DAMAGE TO THE HARDWARE. The ShowSCSI progam is used to determine the SCSI ID numbers of existing devices before assigning an ID number to a new device.
• Using ShowSCSI
Double-click the ShowSCSI icon to launch ShowSCSI. Initially the program looks for SCSI devices connected to the Macintosh. After the search has completed, a window appears which lists the eight SCSI ID numbers and indicates if a corresponding device has been found. If a device is found, the type, vendor, product, and version of the device are listed.
Make sure all of your SCSI devices have power and are connected to the Macintosh. ShowSCSI will not recognize devices which are off. If you have turned on a SCSI device after launching ShowSCSI, the ID list will need to be updated. To update the list, select Update from the ShowSCSI menu or type <command>-U.
Assign a new SCSI device one of the unused ID numbers. Do not connect a device to the SCSI chain without knowing its ID number. When changing the ID number of a device, make sure the power for the device is off. IT IS IMPORTANT THAT EACH SCSI DEVICE IN THE SCSI CHAIN HAS A UNIQUE ID NUMBER. MAKE SURE YOU DO NOT HAVE TWO DEVICES WITH THE SAME ID NUMBER; IF TWO DEVICES ARE ASSIGNED THE SAME ID NUMBER NEITHER OF THE DEVICES WILL OPERATE PROPERLY AND EITHER OF THE DEVICES CAN POTENTIALLY BE DAMAGED.
• Quitting ShowSCSI
To quit ShowSCSI, select Quit from the File menu, or type <command>-Q, or click the close box in the upper-left corner of the window.
