Product manual

18 Scorpion 40 DDS-4 Product Manual, Version A
Parity checking (pins 9 and 10)
If a jumper is installed on pins 9 and 10 (the default setting), parity checking is
enabled. If no jumper is installed, parity checking is disabled, but parity is still
generated by the drive.
Terminator power (pins 11 and 12)
Internal Scorpion 40 drives are shipped with terminator power disabled (no jumper
across pins 11 and 12, as shown in Figure 6). You can enable terminator power, if
necessary, by placing a jumper across pins 11 and 12.
Note 1: If the termination power jumper is installed, be careful not to short the
TERMPWR signal to ground (for example, by attaching the SCSI cable
upside down). If this occurs, the drive will not longer supply terminator power
to the bus. The fuse will reset automatically after the short is corrected.
Note 2: The internal Scorpion 40 does not provide SCSI termination, and therefore
should not be installed as the last device in a SCSI chain. See “Connecting
the SCSI interface cable” for details.
Dip-switch settings
Figure 7 on the following page shows the location of dip switches on the underside of
the Scorpion 40. Each of these switches is described in detail on the following pages.
If you change a dip switch, the new setting will not take effect until you turn the drive
off, and then on again.
Data compressione (DC)
SCSI DC control
Media recognition
Self Test
Wide/Narrow SCSI
Inquiry String support
1
2
3
4
5
6
7
8
9
10
O
N
Default settings shown
Front of drive
Operating-system
configuration
switches
Figure 7. Dip-switch settings for internal Scorpion 40