User`s guide

FT1200 HANDBOOK 4/1
4 SCSI DRIVES
This chapter describes installation of and support for SCSI devices,
how to configure them and how to use the SCSISelect utility.
SCSI Device Support
The motherboard has an Adaptec AIC-7895 dual-channel SCSI
controller chip integrated as a PCI bus master. The controller
supports data path widths of 8-bit (narrow SCSI) at a data transfer
rate of up to 20 MB/sec and 16-bit (wide SCSI) at a data transfer
rate of up to 40 MB/sec.
The motherboard has three onboard SCSI connectors:
♦ Channel A has one 68-pin, 16-bit connector
♦ Channel B has one 68-pin, 16-bit connector and one 50-pin,
8-bit connector
Drive bays
♦ The forward drive bay can accommodate two hard disk drives.
Either drive may be 3.5 or 5.25 width, but only 1 inch high.
♦ The bay below the CD-ROM drive can accommodate any full-
width, half-height peripheral drive, such as the optional DAT
drive shown in the chapter, ‘Removable media drives’.
♦ The rear drive bay is designed to take one or two 3.5 x 1 inch
high, SCSI drives.
Termination rules
When attaching internal SCSI devices, a terminated device must be
attached to the last connector on the data cable. Other
unterminated devices can then be attached to the data cable. See the
SCSI device’s documentation for instructions on termination. The
motherboard is connected to the other end of the cable, and it is
terminated by default.
More details about this and other drive jumpers can be found on
pages 2 and 3 of this chapter.