'' isn't that the the serealized logical links set forth in said patents."

It's their ability to create hierarchy within links(link list) that is patented...

RE: fault tolerance...

In that ability, another consideration of fault tolerance is not having to maintain directive structures ie...FAT.

coupled to this....

In creating... recorded data.....NO RAM resource necessary....the only thing that is held in a volatile state at risk, is within a high speed...ie.. SRAM....sized to one read / write block of a non-volatile memory......that risk can be devised to the least minimal loss depending on the memory....ie...NAND 256 bytes=1 R/W block... or, as low as NOR 1 byte=1 R/W block.

doni