Sun Microsystems SPARCstorage Library Installation And User Manual page 138

B
Direct Connection
Use a direct connection when you are connecting the first SCSI device in the
SCSI bus to the desktop system by connecting one end of the SCSI cable to one
of the SCSI ports of the tape library, and the other end of the SCSI cable to the
SCSI port of the desktop system. You must connect a regulated SCSI terminator
to the other SCSI port of the tape library.
Note – If you install a SBus card with an additional SCSI port in the desktop
system, you can connect the tape library to the SCSI port of the SCSI card.
Daisy Chain Connection
A daisy chain connection is a means of connecting a maximum of seven SCSI
peripherals to a host system. It allows a single port on the desktop system to
connect to more than one SCSI peripheral. If you want more than one SCSI
peripheral on a bus, you need to daisy chain.
Note – For best performance, connect no more than four tape drives to the
same SCSI bus. If another drive is already connected to it, add no more than
two tape drives.
If you connect SCSI devices to your system in this manner, connect a regulated
terminator to the unused SCSI port on the back panel of the last device in the
daisy-chain.
Note – Devices with the old-style connectors (3-row 50-pin D connectors or 50-
pin ribbon connectors) should not be used on the same bus (daisy-chained)
with fast SCSI devices.
B-2 SPARCstorage Library Installation and User's Guide—June 1995