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ATTO Technology Inc. Diamond Storage Array Installation and Operation Manual
3.2.2 Connecting a SCSI Array
The SCSI Diamond Storage Array 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 Storage Array
1 Insert a SCSI VHDCI connector into the Host
Interface Card in the back of the array. If the
SCSI array is the last device on the bus, you
must attach a VHDCI terminator to one
connector of the SCSI Host Interface Card or
connect a cable between the second connector
and the next device on the SCSI bus.
2 The 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.
Note
If slower devices are connected on the same
SCSI bus as the Ultra 160 array, the bus
communicates at the rate of the slowest
device.
Exhibit 3.2-1 SCSI cable options.
Exhibit 3.2-2 SCSI interface cards: left without terminators attached; right with a terminator attached.
Bus speed, MB/sec.
max.
Bus width,
bits
Max. bus lengths,
meters
Max. device
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