Installing internal tape drives
Reviewing Drive Default Settings
22
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
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
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.
12
Open
Open
Shunted
Shunted
13
Shunted
Open
Shunted
Shunted
14
Open
Shunted
Shunted
Shunted
15
Shunted
Shunted
Shunted
Shunted
Jumper Pins 9–10:
Pins 9-10 shunted: Enable parity checking (
default
)
Pins 9-10 open: Disable parity checking
Jumper Pins 11–12:
Pins 11-12 shunted: Enable terminator power
Pins 11-12 open: Disable terminator power (
default
)
TABLE 3.
SCSI IDs and Corresponding Jumper Settings (Continued)
SCSI ID
Jumpers
1–2
3–4
5–6
7–8
