The steps below explain the disk addressing and cabling for the D1000 only.            

CABLING THE D1000

The D1000 68 pin connect is Differential Ultra SCSI connections, which is supported to -

	Sbus differential Ultra SCSI host bus adapter (X1065A), or
	PCI dual port Ultra SCSI host bus adapter (X6541A).

The D1000 is available in 2 models; an 8 drive or 12 drive system.

The D1000 has the capability of using all 8 or 12 drives on one host.  Or you can divide
your D1000 into 2 backplanes each using 4 or 6 drives, depending on which model you have 
on each host. You can now dual host the D1000 with Sun Cluster software 2.1, 2.2 or 3.0. 

On the rear of the D1000 you have (4) 68 pin scsi connectors.

If you will be connecting all 8 or 12 drives to one system, you will need to connect 
the scsi cable from the host to the far left or the far right connector.  On the other 
far right or left 68 pin connection, you need to connect a differential terminator 
(Part Number 150-1890).  The 2 inside connections will need to be connected to each other 
using the small scsi cable which came with the D1000 (Part number 530-1883).

If you will be using the D1000 as 2 backplanes of 4 or 6 drives each, you will need to 
connect HOST-A to the far left 68 pin connector.  Then connect HOST-B to the far right 
68 pin connector. Then the 2 inside 68 pin connectors each need to have a differential 
terminator (part number 150-1890) connected.                  

The D1000 can now be dual hosted, but ONLY with Sun Cluster 2.1, 2.2 & 3.0 software 
installed. To install the hardware you will need to connect HOST-A to the far left 68 pin 
connector. Then connect HOST-B to the far right 68 pin connector. The 2 inside connections 
you will need to connect to each other using the small scsi cable which came with the D1000 
(Part number 530-1883).            

SETTING TARGET ADDRESS

You can change the address of the drives by changing the dipswitch settings on SW1.

SWITCH	DIP	SETTING		DESCRIPTION
------  ---     -------         -----------
  SW1    1        UP*	Addresses 4 right drives to 8 - 11 or 8 - 13
  SW1    1       DOWN   Addresses 4 right  drives to 0 - 3 or 0 - 5
  SW1    2        UP    Addresses 4 left drives to 8 - 11 or 8 - 13 
  SW1    2       DOWN*  Addresses 4 left  drives to 0 - 3 or 0 - 5
  SW1    3        UP    Wait for a start unit command
  SW1    3       DOWN*  Uses the SW1 dip 4 settings 
  SW1    4        UP*   Delay each drive 12 sec X the drive id
  SW1    4       DOWN   Start all drives on power on
  SW1    5      UP/DOWN Reserved for future use on the D1000
  

* denotes default settings.

NOTE:  You must be careful in setting the switches.  If you are not careful
       you can have a conflict in the target address when using all drives
       on a single host.  



REFERENCE  MATERIAL

Sun StorEdge A1000 & D1000 Installation, Operation & service manual p/n 805-2624