Entries in the h3cSysBtmLoadTable are created and deleted using
the h3cSysBtmRowStatus object.
When a new row is being created and the number of entries is
h3cSysBtmLoadMaxNumber, the row with minimal value of
h3cSysBtmLoadTime and the value of h3cSysBtmFileType is none(2),
should be destroyed automatically.