Sun Microsystems StorEdge, Troubleshooting Manual

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Chapter 1 Introduction 3
New Features of the Sun StorEdge SAN
4.0 Release
The Sun StorEdge SAN 4.0 release supports many new features, that are
summarized in
TABLE 1-1
. Several features of the SAN 3.x release are not included in
the SAN 4.0 release, and many features were carried forward. For an explanation of
the new features, see the Sun StorEdge SAN 4.0 Release Configuration Guide.
TABLE 1-1
Comparison of the SAN 3.0 and SAN 4.0 Releases
Feature
SAN 3.x Features Not
Supported in SAN 4.x SAN 3.x Features
Included In SAN 4.x
SAN 4.x New Features
Supported
Configurations Cascaded
configurations
limited to three
linear connected
switches, or three
ISL links between
switches. N/A Cascaded
configuration limit
increased to eight
linear connected
switches, or seven
ISL links between
switches. Two of the
ISL links can use
long-wave
transceivers and
cables.
SAN configurations
limited to single-
switch or simple
cascades. Support for local
host and storage
device attachment
with short- or long-
wave cables and
transceivers for
disaster tolerant
configurations. SAN configuration
restrictions lifted.
Meshes and other
configurations are
now possible.
Limit of 2 switches
supported in a SAN. N/A Configurations
support up to 239
switches. Check with
the vendor-specific
switch
documentation for
details.
Limited partial
fabric supported for
connections between
hosts and switches. N/A Full fabric support
for connections
between storage
devices, hosts and
switches.