A 'sparse' table containing storage detail information for
'logical' or 'physical' storage elements on this host system,
augmenting a basic entry in the 'hrStorageTable' of the
IETF Host Resources MIB (RFC 2790).
Usage: UNLIKE the 'xcmGenOptionTable' in the XCMI General MIB
(which is a unique exception), this table of 'dictionary-based'
storage details is used with DIRECT create/update operations.