Parity Checking; Terminator Power - Quantum Audio DAT72 Online Manual

Installing internal tape drives
TABLE 3. SCSI IDs and Corresponding Jumper Settings (Continued)
SCSI ID
12
13
14
15
NOTES: You can also change SCSI IDs by connecting a SCSI address-selection switch to
pins 1 through 8.
If you change the drive's default SCSI ID, avoid using SCSI IDs 0 and 1 (which typically are
assigned to a boot drive) and SCSI ID 7 (which typically is assigned to SCSI controllers or
host bus adapters).

Parity Checking

Jumper Pins 9–10:
By default, parity checking is enabled on the internal tape drive. To disable parity checking, remove
the jumper from pins 9 and 10.
NOTE: If you disable parity checking, the drive still generates a parity bit.

Terminator Power

Jumper Pins 11–12:
By default, terminator power is disabled on the internal tape drive. To enable terminator power,
place a jumper across pins 11 and 12.
NOTE: If you enable terminator power, be careful not to short the TERMPWR signal to
ground (for example, by attaching the SCSI cable upside down). If a short occurs,
terminator power to the bus is interrupted. After the short is removed, a fuse in the drive is
automatically reset, restoring terminator power.
Jumpers
1–2 3–4 5–6
Open Open Shunted
Shunted Open Shunted
Open Shunted Shunted
Shunted Shunted Shunted
Pins 9-10 shunted: Enable parity checking (default)
Pins 9-10 open: Disable parity checking
Pins 11-12 shunted: Enable terminator power
Pins 11-12 open: Disable terminator power (default)
Reviewing Drive Default Settings
7–8
Shunted
Shunted
Shunted
Shunted
22