Seagate ST19171WC Product Manual - Page 50
TP2 and TP1
View all Seagate ST19171WC manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 50 highlights
40 Barracuda 9 Product Manual, Rev. C 8.1.2 Function description J2 Jumpers TE On Off Jumper Function Description (Applies only to "N" and "W" models) On-board (non-removable) terminator circuits are enabled. (Default) On-board (non-removable) terminator circuits are disabled. DS ME Off Off Off On On Off On On (Applies to all models) Spindle starts immediately after power up. (Default) Spindle does not start until a Start Unit command is received from the host. Startup is delayed by SCSI ID times 12 seconds after power is applied. For example: Drive with SCSI ID of 0 starts the spindle immediately when DC power connected, drive with SCSI ID of 1 starts after a 12-second delay, drive with SCSI ID of 2 starts after 24second delay, etc. Tolerance is plus 3 seconds, minus 0 seconds. Spindle starts when the host sends a Start Unit command. Delayed start feature is overridden and does not apply when the ME jumper is installed. WP (Applies to all models) On Drive is write protected. Off Drive is not write protected. (Default) PD (Applies to all models) On SCSI parity checking and parity error reporting by the drive is disabled. Off Drive checks for parity and reports the results of parity checking to host. (Default) RES Off (Applies to all models) Reserved for spindle sync cabling. Pin 9 is the spindle sync reference. Pin 10 is spindle sync ground. Do not connect a jumper to these pins. (Default) TP2 TP1 Off Off On Off Off On On On (Applies only to "N," "W," and "WD" models) No terminator power is connected to the drive terminators or the SCSI bus I/O cable.* Drive supplies its own terminator power only. (Default) Drive supplies power to the SCSI bus I/O cable* but not to the internal terminators. When drives have differential I/O circuits (WD drives), a jumper on the TP1 position may be needed to power external terminators (see system documentation). Drive supplies terminator power to itself (internal connection) and to the SCSI bus I/O cable.* TP2 and TP1 "Position A" On Off (Applies only to "N," "W," and "WD" models) This horizontally-positioned jumper (across J2 pins 2 and 4) connects terminator power from SCSI bus I/O cable* to the drive's internal terminators (for single-ended I/O only). See Figures 9 and 10. See above explanations for TP jumpers. *See Tables 13, 14, and 15 for pins used for Termpower.