40 MB SmartDrive AT (250-4123)  Jumper Settings       Faxback Doc. # 3090

Single-IDE Drive (DEFAULT):          Dual-IDE Drive, Primary Drive:
JUMPER      SETTING                  JUMPER       SETTING
1-2 ACT     jumpered                 1-2 ACT      not jumpered
3-4 DSP     not jumpered             3-4 DSP      jumpered
5-6 C/D     jumpered                 5-6 C/D      jumpered
7-8 HSP     not jumpered             7-8 HSP      not jumpered

Dual-IDE Drive, Slave Drive:
JUMPER      SETTING
1-2 ACT     jumpered
all others  not jumpered

SUMMARY:
JUMPER      SETTING        FUNCTION

1-2 ACT     jumpered       Provides signal to drive LED
7-8 HSP     not Jumpered   Reserved for future use.

Jumpers 3-4 and 5-6 work in conjunction with each other.

SINGLE SMARTDRIVE SYSTEM:
JUMPER      SETTING        FUNCTION

1-2 ACT     jumpered       Indicates that the drive is the
5-6 C/D     jumpered       only SmartDrive installed (default).

DAISY CHAIN, PRIMARY SMARTDRIVE:

JUMPER      SETTING        FUNCTION
3-4 DSP     jumpered       Indicates that this is the PRIMARY
5-6 C/D     jumpered       drive in the Daisy Chain.

Daisy Chain, Secondary SmartDrive:

JUMPER      SETTING        FUNCTION
3-4 DSP     not jumpered   Indicates that this drive is the 
5-6 C/D     not jumpered   second drive in the Daisy Chain.

(dtc-07/29/93)