Chapter 3 Configuring Your Library
Working With FC I/O Blades
Scalar i500 User’s Guide
104
•
Loop ID
—Loop IDs can be set to
Auto
or a hard value from 0
through 125. Selecting
Auto
automatically selects a unique loop
ID. Some FC host operating systems require hard loop ID
settings. The default setting is
Auto
.
•
Speed
—The interface speed can be set to
Auto
,
1 Gb/s
,
2
Gb/s
, or
4 Gb/s
. Selecting
Auto
automatically sets the interface speed. The
default setting is
Auto
.
•
Frame Size
—Frame size can be set to
512
,
1024
, or
2048
. The
default setting for ports 1 and 2 is
2048
. Your FC host might
require a different setting.
•
Connection
—The connection mode for the ports can be set to
Loop
,
Loop Preferred
,
or
Point to Point
. The default setting is
Loop
Preferred
.
• After modifying these parameters, save the library configuration. For
instructions on how to save the library configuration, see
Saving and
Restoring the Library Configuration
on page 329.
The paths to open the appropriate screens are as follows:
• From the web client, select
Setup > I/O Blades > Port Configuration
.
• From the operator panel, select
Setup > I/O Blades > Port
Configuration
.
FC I/O Blade Internal
Virtual Port for Medium
Changers
3
FC I/O blades use an internal virtual port to access the medium changer
devices (every defined partition has a medium changer device). Each FC
I/O blade can access all medium changer devices, except those that are
defined in association with drive-based access (also known as “LUN-1”).
The Scalar i500 library can have up to 18 partitions. These internal virtual
ports are not configurable via channel zoning; thus, all medium changer
devices are accessible via ports 1 and 2 of each FC I/O blade present
within the library. This may lead to one or more medium changers being
discovered multiple times, depending on how the system is connected to
host servers (for example, if four partitions are defined in a system that
has two FC I/O blades, there would be four medium changers visible on
ports 1 and 2 of both FC I/O blades, for a total of 16). To minimize
unnecessary discovery of medium changers, you need to configure host
mapping. See
Managing FC Hosts and Host Mapping
on page 106.