Dell Emulex Family of Adapters - Manual (Page 1471)

Boot for the Fibre Channel Protocol User Manual P010096-01A Rev. A
6. EFIBoot
EFIBoot Reference
1471
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RSCN and LOGO/PRLO are handled by the driver. Reception of either
causes new discovery/logins to take place.
Note: In a fabric environment, the order in which disk devices are created is based on
the name server response data (which is not guaranteed to be in any special
order). Between successive boots, the same device may be identified with a
different physical device number. However, any devices that have been
assigned a device letter through the disk administrator continue to use that
letter regardless of the physical device number.