Jumper Signal Description On 80 Pin Jumper Block; Disable Auto Spin (Position 1-2); Auto Spin Delay And Delay Spin 12 / 6 (Position 3-4); Force Single Ended Mode (Position 7-8) - Hitachi HUS151473VL3800 - Ultrastar 73.4 GB Hard Drive Specifications

7.9 Jumper signal Description on 80 pin Jumper Block

7.9.1 Disable Auto Spin (position 1-2)

If a jumper is not installed, the drive will spin up automatically after the power on reset. If a jumper is installed, the
drive will not spin up unless a START UNIT command is received.

7.9.2 Auto Spin Delay and Delay Spin 12 / 6 (position 3-4)

These pins control when and how the drive spins up with the combination of Position #1-2 on J6. When both Auto Spin up and
Auto Start Delay are enabled, the drive start will be delayed by a period of time multiplied by its own SCSI address. If Auto
Spin up is disabled, these jumpers will be ignored. Placing a jumper on delay start 12 / 6 results in a start up delay of 12 sec-
onds time the SCSI ID.
Note: In the table below, "on" means a jumper is installed and "off" means that a jumper is not installed.
Table 16: Auto start delay & delay start 6/12 drive behavior
Model Jumper Settings
68p/ SCA
Disable
Auto Spin
OFF
OFF
OFF
OFF
ON
ON
ON
ON

7.9.3 Force Single Ended Mode (position 7-8)

If a jumper is installed, the drive functions as a single-ended mode drive.

7.9.4 Reserved (position 9-10)

No connection should be made.
Auto Spin Dly 12 /6
Delay Start ?
YES
OFF OFF
OFF ON YES
ON OFF YES
ON
ON YES
NO
OFF OFF
OFF
ON NO
ON OFF NO
ON ON NO
Hitachi Ultrastar 15K147 SCSI Hard Disk Drive Specification
Response
Auto Delay Multiplier
0
0
6
12
-
-
-
-
27