ATTO Technology 1550D Benutzerhandbuch

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Connecting SCSI devices to the SCSI port
ATTO iPBridge SCSI ports connect SCSI storage 
devices to the network. 
The SCSI port is a bus capable of supporting 15 
devices and each bus is capable of 40, 80, 160 or 
320 MB/sec. (Ultra, Ultra2 or Ultra320) transfer 
rates.
The iPBridge supports a wide variety of SCSI 
storage devices including stand-alone drives, 
removable drives, JBODs, RAIDs, tape, CD and 
DVD drives, changers and libraries.

1

Connect the cable from the SCSI device to a 
VHDCI SCSI port on the iPBridge.

2

Check the type of cable, cable length limit and 
number of devices recommended for the port. 
See Exhibit 1. 

  Keep cable lengths as short as possible to 

ensure the highest signal quality and 
performance. These cable lengths include the 
wiring inside the devices. 

3

Set the IDs of the SCSI devices connected to 
the bridge to a value other than 7. 

  Use a sequential ID starting at 0 for each 

device. The SCSI port in the ATTO iPBridge 
has an internal factory setting ID of 7, typical for 
a SCSI initiator device.

4

Terminate the SCSI bus after the last device. 
The iPBridge is terminated internally. 

Use at least Cat 5e cable to connect the Ethernet 
port to your network. 

Note

For best performance, support for 9014 byte 
jumbo frames should be available for all switches 
and host iSCSI equipment.
Before you begin installing the iPBridge Ethernet 
port, be sure to check or complete the following:

•  If you are managing your iSCSI system across a 

WAN and your system uses a firewall, be sure 
that the following ports are open and available:

  If you are using the TCP protocol

•  telnet (port 23)
• http 

(port 

80)

•  ftp (ports 20 and 21)
•  iSCSI (port 3260)

• iSNS 

(port 

3705)

  If you are using the UDP protocol

•  ntp (port 123)

•  Be sure your host system(s) is set up and 

configured. 

•  Your host system can use any of three 

different types of cards: a network interface 
card (NIC), a telnet offload engine card 
(TOE), or a storage network interface card 
(SNIC). 

•  The ATTO driver file from the CD included 

with your iPBridge or from the ATTO 
website, 

, is installed on 

your host.

•  The switch has been configured to forward 

UDP broadcast messages.

•  The minimum requirement for Windows-based 

browsers is Internet Explorer 5.5 or Netscape 
Navigator 6.2. The minimum requirement for 
Macintosh browsers is Internet Explorer 5.2 or 
Safari 1.2.

•  Ethernet speed defaults to auto; the iPBridge 

determines the speed and set other parameters 
based on the speed.