Advanced Digital Information Corporation FastStor 1
10 FastStor 1 Quick Installation Guide
1. Add the length of all external and internal SCSI cables on the bus
2. Add 80 cm (31.5 inches) for the internal cable length in the FastStor 1.
3. If the number of SCSI devices exceeds two, the maximum allowed length of
an LVD SCSI bus is 12 m (39 ft).
4. For an SE SCSI bus, be very careful regarding bus length. The normal
combination has an SE bus transfer speed of 160 MB/s with a maximum
bus length of 3 m (9.8ft) and up to 4 SCSI devices connected. If your SE
system operates with a different transfer speed or has more than 4 SCSI
devices, refer to the actual SCSI standard for complete bus length
restrictions.
D) Before you power on the FastStor 1 and restart the system, make sure the
SCSI bus is properly terminated. If the FastStor 1 terminates the SCSI bus,
ADIC recommends that you connect the terminator from the accessory kit
box on the lower SCSI connector on the back plane.
To connect the SCSI bus cable:
1. On the rear of the FastStor 1, attach the SCSI cable’s device connector to
the upper SCSI connector. (See Figure 11.)
2. Secure the cable with the thumbscrews on the connector.
3. Connect the other end of the SCSI cable to the appropriate SCSI adapter on
your system, and then fasten it with the thumbscrews.
4. If the FastStor 1 is the last device on the SCSI bus, install a SCSI bus
terminator to the free SCSI connector on the FastStor 1. Make sure the
terminator is the correct type for your SCSI system.
5. It is possible to daisy chain several SCSI devices on the SCSI bus. If you do
so, the terminator must be connected to the last device on the bus. Note
that there are limitations to the SCSI cable length.
Figure 11. SCSI cable and SCSI terminator connection