Sun Microsystems StorEdge 3000 Series, Installation, Operation And Service Manual

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Appendix B Using Standalone JBOD Arrays B-11
Use host-based multipathing software such as VERITAS DMP 3.2 or 3.5 software to
manage Sun StorEdge 3510 FC JBOD arrays connected to a host over more than one
loop. Multipathing software provides full services on multiple paths between the
server and the storage system.
FIGURE B-3
Sun StorEdge 3510 FC JBOD Array Attached to Two HBA Ports
FIGURE B-3
shows an example of a Sun StorEdge 3510 FC JBOD array with 12 drives
connected to a host computer over two loops to two FC ports. In this example both
ports are on dual-port HBAs.
When you connect your Sun StorEdge 3510 FC JBOD array to a host over two loops,
the
format
command shows 24 drives—12 on each loop—because the host sees a
device entry for each path. If the loop switch ID is set to 0, these drives are identified
as ranging from
c1t0d0
to
c1t11d0
and from
c2t0d0
to
c2t11d0,
as shown in
TABLE B-4
. However there are, of course, still only 12 physical drives in the JBOD
array. These drives are arranged in four columns of three drives each, as shown in
TABLE B-3
and
FIGURE B-5
.
Host computer
JBOD