1 map devices, Fibrebridge mapping, Scsi device mapping – ATTO Technology 2400C/R/D User Manual
Page 22: Mapping devices automatically, Mapping devices manually, Map devices, Continue on to, Rameters but you may go directly to, Devices
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ATTO Technology Inc. FibreBridge Installation and Operation Manual
3.1 Map Devices
After getting an IP address and entering ATTO ExpressNAV, you must map devices so that the FibreBridge can
access the devices in your network.
The ATTO FibreBridge allows parallel SCSI devices to
participate in a Fibre Channel arbitrated loop or on a
fabric. Fibre Channel and parallel SCSI use different
models to address devices. The FibreBridge
translates between these addressing models.
FibreBridge mapping
On a Fibre Channel Arbitrated Loop, the FibreBridge
appears at a single Arbitrated Loop Port Address
(AL_PA). Each device on an arbitrated loop is
assigned a unique AL_PA during loop initialization.
The FibreBridge supports both modes of AL_PA
assignment, commonly referred to as hard and soft
addressing.
WWN: to identify each Fibre Channel device while
addressing, each Fibre Channel device is assigned a
unique World Wide Name (WWN). The 64-bit WWN
has the following format:
Soft addressing allows the loop initialization master
to assign the FibreBridge a unique address during the
loop initialization process. The address assigned
cannot be determined before loop initialization. Adding
new devices to an arbitrated loop may change the
address assigned to the FibreBridge.
Hard addressing allows a predetermined address to
be assigned to the FibreBridge. The FibreBridge tries
to acquire the desired hard address. If another device
has already been assigned the specified address, the
FibreBridge acquires a currently unassigned address.
Note
The default mode is soft addressing.
SCSI device mapping
SCSI devices connected to the FibreBridge are
viewed as Fibre Channel LUNs to the host computer.
SCSI devices must be on the same addressing level
as the SCSI portion of the FibreBridge. The
FibreBridge SCSI ID must be set to a different SCSI ID
from the other devices on the same bus.
The ATTO ExpressNAV interface graphically shows
you current mapping and the SCSI devices available
for mapping. Refer to
Use the ExpressNAV interface to map devices
automatically or to customize mapping. You may
modify the mapping as needed to make a device
inaccessible to a host or to replace a non-functioning
mapped unit.
Note
It is not necessary to set all mapped devices
online: SCSI commands sent to offline devices
are rejected.
Mapping devices automatically
1
If you are not already in
the ExpressNAV
interface, type the IP
address of your
FibreBridge in a
standard browser as
found in
Enter Here,
type in your user name
and password, and click
OK.
2
The
Status page
appears.
3
From the ExpressNAV
main menu, click on the
Mapping menu item on
the left side of the
screen.
4
The
Mapping page
appears. Wait for the
automatic scan for devices to complete.
5
Click
AutoMap.
All the commands necessary to enable
mapping and the command
saveconfiguration norestart are performed.
Mapping devices manually.
1
If you are not already in the ExpressNAV
interface, type the IP address of your
FibreBridge in a standard browser as found in
on page 27, click
Enter.
Field
Name
WWN
Format
Company ID
Device ID
Byte
0
1
2
3
4
5
6
7
Value
20
00
00
10
86
xx
xx
xx