DECstation 5000/260, Руководство оператора, Страница: 68 / 215

5.3 Rules for Connecting Storage Devices
5.3 Rules for Connecting Storage Devices
For the system to work properly, external storage devices must be connected to
your workstation according to the following rules:
• Up to seven SCSI drives (either self-contained or installed in multiple-drive
expansion boxes) can be attached to each SCSI connector.
• A self-contained drive is one drive in its own box
• A BA42 expansion box can hold one or two drives
• A TCE can hold up to three drives
• External storage devices that use the same SCSI connector must be linked
together by SCSI cables, forming a single chain of devices. Each expansion
box or self-contained storage device has two SCSI connectors:
• One connects the device or box to the base system or to the previous
device or box in the chain.
• The other connects the device or box to the next device or box in the
chain.
• A SCSI terminator must be connected to the unused SCSI connector on the
last device or box in a chain.
• Each drive in a chain of devices connected to one SCSI connector must
have a unique SCSI ID number. (See Section 5.6 for information about
determining and setting SCSI ID numbers.)
• Up to three expansion boxes can be connected to each SCSI connector.
• The SCSI bus cannot exceed 19.8 feet (6 meters).
5–4 External Storage Devices