Safety considerations, Safety considerations –3, Caution – Avago Technologies AcceleRAID 170LP User Manual
Page 23: Warning
Installation
Manual No. DB11-000024-00
2-3
* The Maximum number of devices allowed on a Wide Ultra SCSI bus is 8, unless bus
extender technology is used.
† This length can be extended to 25 meters if there are only 2 devices (e.g., the controller and
one drive) on the bus in a point-to-point configuration.
Safety Considerations
Be sure to observe the following precautions before beginning the controller
installation procedure:
Caution
Anti-static handling procedures are required. Leave
the controller in its anti-static bag until it is time to
plug the controller into the PCI slot. The use of a
grounded wrist strap and other ESD protective
measures are highly recommended.
WARNING
Disconnect the system from the electrical wall
outlet before opening the system cabinet. Working
with the system covers off and power applied to the
system can result in shock and serious injury.
Table 2-1. SCSI Formats and Bus Lengths
SCSI Trade Association
(STA) Terms
Bus
Speed,
MB/Sec,
Max.
Bus
Width,
Bits
Max. Bus Length, Meters
Max. Device
Support
(Including
Controller)
Single-ended
Low-Voltage
Differential
SCSI-1
5
8
6
-
8
Fast SCSI
10
8
3
-
8
Fast Wide SCSI
20
16
3
-
16
Ultra SCSI
20
8
1.5
-
8
Ultra SCSI
20
8
3
-
4
Wide Ultra SCSI
40
16
-
-
16*
Wide Ultra SCSI
40
16
1.5
-
8
Wide Ultra SCSI
40
16
3
-
4
Ultra2 SCSI
40
8
Not Defined
12†
8
Wide Ultra2 SCSI
80
16
Not Defined
12†
16
Ultra 160 SCSI
160
16
Not Defined
12
16