Path description string format, Displaying path information, 122 displaying path information – HP 3000 Enterprise Virtual Array User Manual
Page 122: Typical iscsi path description string
66.0.50001fe150002f70.50001fe150002f78,0
Relative ID:
0
Name:
4000002a0000,iqn.1986-03.com.hp:fcgw.mpx100:mpx100-
66.0.50001fe150002f70.50001fe150002f7a,0
Relative ID:
0
Name:
4000002a0000,iqn.1986-03.com.hp:fcgw.mpx100:mpx100-
65.1.50001fe150002f70.50001fe150002f7e,0
Relative ID:
0
#
Configuring multipath with the OpenVMS iSCSI Initiator
Multipath support for the OpenVMS iSCSI Initiator is native to OpenVMS. No additional software is
required for full iSCSI multipath support.
When the OpenVMS Initiator is loaded, it uses the manual or iSNS discovery mechanisms to locate
all viable paths to all accessible storage targets. It maintains an active login with every path to each
target. If the current active path fails, I/O can be automatically failed over to another available path.
As with other interconnects supported by OpenVMS, the multipath software performs initial path
selection and is responsible for path failover in the event the active path fails. The user can effect
multipath changes (such as manual path switching) using the DCL command:
SET DEVICE /qualifier /PATH=path-description-string device-name
Path description string format
iSCSI path description strings are significantly longer than the description strings used for other
multipath interconnects, such as Fibre Channel. An example of a typical iSCSI path description string
is shown in
and
.
Figure 64 Typical iSCSI path description string
.
Table 18 Typical iSCSI path description string
Description
Unit
The iSCSI ‘device’ (Note that DEA0: is the pseudo-device associated with the software-based iSCSI
Initiator.)
1
The iSCSI IQN target name presented by the mpx100/100b
2
The host name associated with the IPv4 address of the mpx100/100b iSCSI (GE) port presenting
the target
3
The TCP port number of the mpx100/100b iSCSI (GE) port presenting the target
4
Displaying path information
To display a brief listing of the characteristics of a specific iSCSI multipath device, issue the command:
Setting up the iSCSI Initiator for multipathing
122