Jumper Setting Description TE OFF Termination disabled ON Termination enabled EP OFF Parity checking disabled ON Parity checking enabled WS OFF Wait/spin disabled ON Wait/spin enabled SS OFF Self Seek disabled ON Self Seek enabled A2, A1, - These jumpers are used in A0 combination to determine the drive's SCSI ID [See table 2] PF OFF Not used, factory only, leave open. J13 ON SCSI termination power from OFF drive. SCSI termination power from Host Table 1
Termination Enable (TE) Jumper
One of the requirements of the SCSI bus is that it be properly terminated. If more than one SCSI device is connected to the host, only the last device must be terminated. The Terminator Enable (TE) jumper, when installed, enables an active termination circuit, thereby terminating the SCSI bus. With the TE jumper removed, bus termination is disabled.
At the factory, Quantum configures the Empire 540/1080S hard disk drive with termination enabled; that is, with a jumper installed across the pins labeled TE. To disable termination, remove the jumper from the TE pins. In addition the Empire 540/1080S utilizes a pair of terminating resistor packs, these must be installed when termination is enabled; that is, with the jumper TE installed the terminating resistors must be in place. With termination disabled the resistor packs must be not be in place; that is, when the TE jumper is removed the terminating resistors must be removed.
Enable Parity (EP) Jumper
The Enable Parity (EP) jumper controls parity checking of data across the SCSI bus. With parity checking enabled, the drive performs parity checking. With parity checking disabled, the drive continues to generate parity information, but does not perform parity checking.
At the factory, Quantum configures the Empire 540/1080S hard disk drive with parity checking enabled; that is, with a jumper installed across the pins labeled EP. To disable parity, remove the jumper from the EP pins.
Wait /Spin (WS) Jumper
With the Wait/Spin (WS) jumper disabled, at power on or reset, the drive motor starts to spin automatically, and the drive prepares itself to perform read or write operations without the need for a start command. At a power on or reset, with the Wait/Spin jumper enabled, the host must send a START/STOP UNIT command to activate the drive motor for read or write operations. In addition, with the W/S jumper enabled, the drive performs power sequencing to prevent an overload of the host's power supply due to simultaneous, peak start-up current demands from multiple devices.
At the factory, Quantum configures the Empire 540/1080S hard disk drive with the Wait/Spin jumper disabled; that is, without a jumper installed across the pins labeled WS. To enable Wait/Spin, install a jumper across the pins labeled WS.
This is not used in the field and should be open, ignore this jumper.
Self Seek Jumper
With the Self Seek jumper enabled the drive performs, at power on, a continuous seek diagnostic. This diagnostic will not terminate until: 1) Power is removed, 2) SS jumper removed.
At the factory, Quantum configures the Empire 540/1080S hard disk drive with the Self Seek jumper disabled; that is, without a jumper installed across the pins labeled SS. To enable Self Seek, install a jumper across the pins labeled SS.
SCSI-Bus Device Identification (A0 - A2) Jumpers
Used in combination, the jumper settings across pins A2, A1 and A0 determine the Empire 540/1080S hard disk drive's SCSI-bus device I.D. By default, Quantum configures the drive with a SCSI ID of 6; that is, with jumpers installed across the pins labeled A2 and A1, and no jumpers installed across pins labeled A0.
To assign a different SCSI ID, change the jumper settings as shown in Table 2.
A2 A1 A0 SCSI ID OFF OFF OFF 0 OFF OFF ON 1 OFF ON OFF 2 OFF ON ON 3 ON OFF OFF 4 ON OFF ON 5 ON ON OFF 6 ON ON ON 7 Table 2
J13 Termination Power Jumper
When enabled this jumper supplies +5vdc termination power from the drive to the SCSI bus. With this jumper removed the SCSI bus must supply termination power.
At the factory, Quantum configures the Empire 540/1080S hard disk drive with the J13 jumper enabled; that is, with a jumper installed across the pins labeled J13. To disable Termination Power supply from the disk drive, remove the jumper across the pins labeled J13.
Alternate Address Connector (J12)
The drive's Alternate Address Connector is mounted on the front edge of the drives PCB assembly, near the LED connector. Please refer to table 3 for connector definitions.
Pin Signal Name 1 Ground 2 A2 3 A1 4 A0 5 Not Defined Table 3
The recommended header connector includes:
- Connector housing / 5 position P/N 51021-0500 or equivalent
- Connector housing / 2 position P/N 51021-0200 or equivalent
- Contact Pins P/N 50679-8000 (26 to 30 AWG) or equivalent