Table 3-2SCSI ID Pin Assignments (SCA-2 Connector Versions of the Disk Drive)

 

 

Location on SCA Connector

 

SCSI ID

 

 

 

 

 

ID3 - Pin

ID2 - Pin 40

ID1 - Pin 79

 

ID0 - Pin 39

 

 

 

80

 

 

 

 

 

 

 

 

 

 

 

 

0

0

0

0

 

0

 

 

 

 

 

 

1

0

0

0

 

1

 

 

 

 

 

 

2

0

0

1

 

0

 

 

 

 

 

 

3

0

0

1

 

1

 

 

 

 

 

 

4

0

1

0

 

0

 

 

 

 

 

 

5

0

1

0

 

1

 

 

 

 

 

 

6

0

1

1

 

0

 

 

 

 

 

 

7

0

1

1

 

1

 

 

 

 

 

 

8

1

0

0

 

0

 

 

 

 

 

 

9

1

0

0

 

1

 

 

 

 

 

 

10

1

0

1

 

0

 

 

 

 

 

 

11

1

0

1

 

1

 

 

 

 

 

 

12

1

1

0

 

0

 

 

 

 

 

 

13

1

1

0

 

1

 

 

 

 

 

 

14

1

1

1

 

0

 

 

 

 

 

 

15

1

1

1

 

1

 

 

 

 

 

 

Note: 0 indicates an open circuit and 1 indicates ground.

3.4.3.3Spin Up for the 80-Pin SCA-2 Connector Versions

Maxtor Atlas 10K V drives have three Spin Up modes: Option 1 Spin up occurs immediately when power is applied.

Option 2 Drive spin up occurs after a predetermined delay following power on. Set the delay parameters with the MODE SELECT Command, Maxtor (Vendor) Special Function Control Page (39h).The delay is equal to a user-specified multiplier multiplied by the numerical SCSI ID of the drive. This will give a staggered spin-up in multiple-drive installations.

Option 3 Drive spin up is controlled by the START STOP UNIT command.

Configure the desired spin up option (Table 3-3)by setting the state of the DELAY_SPIN (Pin 38) and STAGGER_SPIN (Pin 78) inputs on the 80-pin SCA- 2 connector (Figure 3-4). The states of these signals are set by using either hardwired connections at the backplane or backplane logic.

3-12 Maxtor Atlas 10K V