Seagate ATLAS IV User Manual

Atlas IV

68-Pin Jumper Settings

The following describes the jumper options and settings available on the Maxtor® Atlas™ IV disk drive. For more detail on jumper definitions; please refer to the jumper definition section.

The Atlas IV was developed by the Quantum Corporation prior to its merger with Maxtor.

Delay Spin (DS)

Enable Delay Spin

Disable Delay Spin

SCSI ID (A3, A2, A1, A0)

Set drive SCSI ID

Jumper across pins 11-12

No jumper across pins 11-12

See ID settings table below

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Atlas IV

68-Pin Jumper Settings

Force SE (SE)

Force Single Ended Mode

LVD Operation

No Wide (NW)

Enable Narrow Mode

Enable Wide Mode

Jumper across pins 13-14

No jumper across pins 13-14

Jumper across pins 23-24

No jumper across pins 23-24

Stagger Spin

Enable stagger spin

Disable stagger spin

Termination Power

Enable Termination Power

Disable Termination Power

Write Protect

Enable Write Protection

Disable Write Protection

Termination Note

Jumper across pins 21-22

No jumper across pins 21-22

Jumper across pins 27-28

No jumper across pins 27-28

Jumper across pins 19-20

No jumper across pins 19-20

The Atlas IV wide disk drive is manufactured as an Ultra2 Multi-Mode LVD device only. This drive does not provide for onboard SCSI bus termination. Refer to your system or SCSI controller documentation regarding recommendations on SCSI bus termination.

Jumper Location

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Atlas IV

68-Pin Jumper Settings

The Atlas IV wide LVD disk drive has two locations where user configurable jumpers are found. The primary jumper block (Front option connector J3) for the Atlas IV wide LVD drive is found on the front edge of the disk drive printed circuit board. Using these jumper pins you can establish the various drive configuration options. The secondary option jumper block (12-pin) provides an alternate method for setting primary drive features. The alternate jumper block is located at the rear of the drive and is incorporated into the SCSI cable connector.

1

3

5

7

9

11

13

15

17

19

21

23

25

27

Signal

logic_gnd

Fault LED

logic_gnd

NC

+5V out

logic_gnd

Term Power (TP)

2

4

6

8

10

12

14

16

18

20

22

24

26

28

Signal

SCSI ID (A3)

SCSI ID (A2)

SCSI ID (A1)

SCSI ID (A0)

Blank (Key, no pin)

Spin Delay (DS)

Force SE (SE)

NC

Busy Out

Write Protect (WP)

Stagger Spin (SS)

No Wide (NW)

Reserved

Term Power (TP)

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