Chapter 6 First-Time Configuration 6-35
6.2 Mapping Logical Drive Partitions to
Host LUNs
The next step is to map each partition you created as one system drive (host
ID/LUN). The host adapter recognizes the system drives after reinitializing the host
bus.
Note – The UNIX and Solaris format and Solaris probe-scsi-all commands do
not display all mapped LUNs if there is not a partition or logical drive mapped to
LUN 0.
Note – The Sun StorEdge Configuration Service program requires that a device be
mapped to LUN 0 as a minimum.
A FC channel can connect up to 16 IDs in loop mode.
The following figure illustrates the idea of mapping a system drive to a host
ID/LUN combination.
â– The FC ID is like a cabinet, and the drawers are the LUNs (LUN is short for logical
unit number).
â– Each cabinet (ID) can have up to 32 drawers (LUNs).
â– Data can be stored in the LUNs of the FC ID. Most FC host adapters treat a LUN
like another FC device.
â– The maximum number of LUNs that can be created for a RAID array is 1024 in
loop mode.
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