HP 3000 Series Handbook page 84

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For HP Internal Use Only
Table 4-16. Address/Option Connector Configurations
Pin-set Function
Upper Lower
Configuration
Pin
1
Pin
1
1
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Not
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Power-
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Used in multiuser systems to provide fauit tolerance. Do noi short this
Used Fail
pm-set.
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Reset/
Write
Protect
2 Gnd Unit At-
Open: Enable Unit Attention.
tention Shorted: Inhibit Unit Attention.
3
Gnd SDTR
Open: Inhibit drive initiation of SDTR message.
Shorted: Enable drive initiation of SDTR message at Power-On and
Reset.
4
Gnd Parity Open: Inhibit parity checking.
Shorted: Enable parity checking.
5
Gnd Auto
Open: Drive will not spin up until Initiator sends Start Unit
Spin-Up
Command.
Shorted: Drive will spin up automatically at Power-On.
6
Key: No pins.
7
Gnd SCSI pin Note: Pin-sets 7 and 8 have no effect if Sync Spindle Mode is
29 disabled.
8
SCSI pin Sync
7 Open, 8 Open: Nat Allowed.
29
Spindle
7 Open, 8 Shorted: Connects Sync Spindle line to SCSI pin 29.
When pin-set 8 is shorted, pin-set 7 must be open.
7 Shorted, 8 Open: Connects SCSI pin 29 to ground. Upper pin of
pin-set 8 is sync output in Master mode, or sync input in Slave
mode. When pin-set 7 is shorted, pin-set 8 must be open.
7 Shorted, 8 Shorted: Not Allowed.
9 Key: No pins.
1 Refers to the pin's orientation when the disk drive is viewed in the right-side-up position (see Figure 4-10, "FRONT
VIEW").
Configuration 4-33