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 A0,A1, - These jumpers are used in A2,A3 combination to determine the drive's SCSI ID [See table 2] DS OFF Delay Spin disable ON Delay Spin enable J2 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 Grand Prix XP32151/34301 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.
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 Grand Prix XP32151/34301 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.
Delay Spin Jumper
With the DS jumper disabled, the drive will start power up sequence immediately when power is applied. With the DS jumper enabled, the drive will pause 8 seconds times the device I.D.
Example: SCSI ID 2 x 8 seconds; drive power up sequence start after 16 seconds.
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 Grand Prix XP32151/34301 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.
SCSI-Bus Device Identification (A0 - A3) Jumpers
Used in combination, the jumper settings across pins A3, A2, A1 and A0 determine the Grand Prix XP32151/34301 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.
A3 A2 A1 A0 SCSI ID OFF OFF OFF OFF 0 OFF OFF OFF ON 1 OFF OFF ON OFF 2 OFF OFF ON ON 3 OFF ON OFF OFF 4 OFF ON OFF ON 5 OFF ON ON OFF 6 OFF ON ON ON 7 ON OFF OFF OFF 8 ON OFF OFF ON 9 ON OFF ON OFF 10 ON OFF ON ON 11 ON ON OFF OFF 12 ON ON OFF ON 13 ON ON ON OFF 14 ON ON ON ON 15 Table 2
The drive's Auxiliary Connector is mounted on the rear of the drive as part of the SCSI header. (Refer to the attached drawing)
The Auxiliary Connector contains the Spindle Sync. jumper. Please refer to the table 3 definition.
Pin Signal Name 1 A0 2 NC 3 A1 4 NC 5 A2 6 SPINSYNC 7 A3 8 LEDOUT 9 NC 10 Ground 11 +5V 12 NC Table 3