3.2.2 Connecting a SCSI Array

The SCSI Diamond-VT uses a VHDCI connector and SCSI cables to connect to a host. It automatically detects the type of Host Interface Card it is using without any intervention.

To connect the SCSI Diamond-VT

1Insert a SCSI VHDCI connector into the Host Interface Card in the back of the Diamond-VT.

or connect a cable between the second connector and the next device on the SCSI bus.

3The SCSI Host Interface Card has a rotary binary-coded hex switch which allows you to set the SCSI ID of the HIC. Be sure the selected ID is different from all other SCSI devices on the bus.

2If the SCSI Diamond-VT is the last device on the bus, you must attach a VHDCI terminator to one connector of the SCSI Host Interface Card

Exhibit 3.2-1 SCSI cable options.

Note

If slower devices are connected on the same SCSI bus as the Ultra 160 Diamond-VT, the bus communicates at the rate of the slowest device.

 

Bus speed, MB/sec.

Bus width,

Max. bus lengths,

Max. device

 

max.

bits

meters

 

support

 

 

 

 

 

 

 

 

 

Single-ended

LVD

 

 

 

 

 

 

 

SCSI-1

5

8

6

-

8

 

 

 

 

 

 

Fast SCSI

10

8

6

-

8

 

 

 

 

 

 

Fast Wide SCSI

20

16

6

-

16

 

 

 

 

 

 

Wide Ultra SCSI

40

16

3

-

4

 

 

 

 

 

 

Wide Ultra SCSI

40

16

1.5

-

8

 

 

 

 

 

 

Wide Ultra 2 SCSI

80

16

-

12

16

 

 

 

 

 

 

Ultra 3 or Ultra160 SCSI

160

16

-

12

16

 

 

 

 

 

 

Exhibit 3.2-2SCSI interface cards: left without terminators attached; right with a terminator attached.

13

ATTO Technology Inc. Diamond Storage Array Installation and Operation Manual

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Image 24
ATTO Technology VT-Class manual Connecting a Scsi Array, To connect the Scsi Diamond-VT, Bits, Single-ended