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|SAS-1/SAS-2 Compatibility Upgrade Guide For the Sun Blade 6000 Modular System|
Replacing a failed LSI host bus adapter on a server blade running the Solaris OS can lead to significant downtime if your replacement adapter does not know how the old adapter was addressing the disks in its server blade and in the disk blade. Among other problems, your system will not know where your boot drive is located.
The lsiutil software is used to export a snapshot of the addressing configuration (persistent mappings) of a healthy LSI host bus adapter to a file. Then, if the adapter fails at a later date, the persistent mappings snapshot can be reloaded on the replacement adapter and your system will operate as before.
Caution - You need to keep a persistent mappings snapshot for the LSI host bus adapters on all server blades in your chassis that are running the Solaris OS. A copy of each file must be kept on external media.