Quantum SDLC 2.7, Руководство по установке

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Installation Guide 135
Host/Library Communication using Fibre Channel and SNC
Usually the library use a SCSI to connect to the Scalar DLC host. However the SCSI cable length cannot
exceed the sensibility limit (see
Table 19 on page 115).
The Fibre Channel connection uses the same SCSI protocol and does not have length limitations, but most
libraries have only SCSI adapters installed, no Fibre Channel. That is why the intermediate hardware
between SCSI and FC is used in this case.
The Storage networking controller (SNC) can be used for both the dual-aisle and single-aisle libraries. Thus
the distance between the Scalar DLC server and the SNC connected to the library can be far enough for
the customer to place the hardware anywhere it would be useful.
See Table 1 on page 7 for a requirements for library, SNC, and AMC, and Table 21 on page 116 for the FC
adapters used.
Installation and Configuration
Depending on the Scalar DLC Solution used see Standard Solution on page 137, or Failover and Self-
Domain Solution on page 138. Then see SNC Setup on page 135 for setting up the SNC.
SNC Setup
After the host(s), library and its drives are on , and all cables are properly connected, configure the SNC.
Use ADIC Management Console (AMC) to set up the SNC, and resolve ports, IP, connection type, zoning,
and WWN. For more details see
SNC User’s Guide and AMC User Guide .
Channel Zoning
The SNC target ports (SCSI connected to the library) and initiator ports (FC connected to the Scalar DLC
host) must be configured to use the same Channel Zoning. Otherwise the connection cannot be established.
Channel Topology
Point-to-point , Fabric , or Arbitrated loop topology can be used as Host-SNC connection.
World Wide Name
The SNC World Wide Name (WWN) must be set before it can be used for the library connection.
Failover and self-domain solution scheme with two SNC devices requires that both SNC have the same
WWN (note that SNC messages are against such setup).
The WWN setup order is as follows.
Step 1 Connect a service terminal to the service port. Alternatively, connect a service computer to the
network that the SNC is on or to the Ethernet port of the SNC.
For the location of these ports and instructions for connecting a service terminal, see SNC
User’s Guide .
Step 2 Issue the
wwnGlobalSet
command to establish a new base WWN.
Using the
wwnGlobalSet
command will update both the node name and port names.
The following messages are displayed: