1. An optical disk having a groove group including one or more spiral grooves and an inter-groove group including one or more lands defined by the grooves, at least one of which constitutes an information recording area,
wherein at least either of the groove group or the inter-groove group is wobbled with wobbles in a radial direction;
a plurality of wobbles form an address codeword used for identifying the recording area;
the address codeword has additional data other than address information in it; and
plural pieces of additional data placed in a plurality of address codewords are integrated to form a code block used for correcting errors of the additional data.
2. An optical disk according to claim 1,
wherein the additional data include control information for protecting address data or cryptographic key information for restricting accesses to the address data.
3. An optical disk according to claim 1,
wherein the additional data includes control information specifying a type of disk and characteristics thereof.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. An apparatus comprising:
a computer system chassis including an air inlet and an air outlet, said air outlet being located cater-cornered from said air inlet such that said chassis is configured to allow an air flow along a diagonal predominant air flow path through said computer system chassis; and
at least one circuit board configured to be positioned in said computer system chassis, said at least one circuit board including a plurality of components coupled to said circuit board, at least one of said components being aligned with said diagonal predominant air flow path when said circuit board is positioned in said computer system.
2. The apparatus of claim 1 wherein said chassis is an Advanced Telecommunications Computing Architecture (ATCA) chassis, and wherein said circuit board is an ATCA blade.
3. The apparatus of claim 1 wherein said air inlet is located in a front bottom region of said chassis and said air outlet is located in a rear top region of said chassis.
4. The apparatus of claim 1 wherein said at least one of said components is coupled to said circuit board such that edges of said at least one of said components are obliquely oriented relative to edges of said circuit board, and wherein at least some of said edges of said at least one of said components are aligned with said diagonal predominant air flow path.
5. The apparatus of claim 1 wherein said components include a plurality of skewed components coupled to said circuit board such that edges of said skewed components are obliquely oriented relative to edges of said circuit board.
6. The apparatus of claim 5 wherein said skewed components include memory modules and processors.
7. The apparatus of claim 5 wherein said skewed components are skewed within a range of angles of about 45\xb0\xb120\xb0.
8. The apparatus of claim 1 wherein said at least one of said components includes at least one heat sink including fins aligned with said diagonal predominant air flow path.
9. The apparatus of claim 8 wherein said at least one heat sink is skewed relative to said circuit board.
10. The apparatus of claim 8 wherein said fins are angled obliquely relative to an edge of said heat sink.
11. The apparatus of claim 10 wherein said heat sink is thermally coupled to a heat generating component, said heat generating component being oriented orthogonally relative to said circuit board.
12. The apparatus of claim 8 wherein said fins are angled obliquely relative to an edge of said heat sink within a range of angles of about 45\xb0\xb120\xb0.
13. An apparatus comprising:
a circuit board including four circuit board edges; and
a plurality of components coupled to said circuit board, wherein said components include a plurality of skewed components, each of said skewed components having component edges oriented obliquely relative to said circuit board edges such that said component edges are aligned with a predominant air flow path through a chassis configured to receive said circuit board, wherein said skewed components further include at least one heat sink coupled to at least one of said components, said heat sink including fins oriented obliquely relative to said circuit board edges such that said fins are aligned with the predominant air flow path through the chassis configured to receive said circuit board.
14. The apparatus of claim 13 wherein said skewed components are skewed within a range of angles of about 45\xb0\xb120\xb0.
15. The apparatus of claim 13 wherein said circuit board is an Advanced Telecommunications Computing Architecture (ATCA) blade.
16. The apparatus of claim 13 wherein said skewed components include memory modules and processors.
17. A method comprising:
determining a predominant air flow path through a chassis configured to house at least one circuit board; and
mounting a plurality of components to at least one circuit board with a skewed orientation such that edges of said components are aligned with said predominant air flow path through said chassis when said circuit board is contained therein.
18. The method of claim 17 wherein mounting said plurality of components includes mounting at least one heat generating component to said at least one circuit board and mounting at least one heat sink to said heat generating component, said heat sink including fins aligned with said predominant air flow path through said chassis.
19. The method of claim 17 wherein said components are mounted such that said edges of said components are angled relative to edges of said circuit board within a range of angles of about 45\xb0\xb120\xb0.
20. The method of claim 17 wherein said chassis is an Advanced Telecommunications Computing Architecture (ATCA) chassis, and wherein said circuit board is an ATCA blade.
21. The method of claim 17 wherein said components mounted with said skewed orientation include memory modules, processors, and heat sinks.
22. A system comprising:
a cabinet comprising a plurality of chassis, at least one of said plurality of chassis being an Advanced Telecommunications Computing Architecture (ATCA) chassis, said ATCA chassis including an air inlet and an air outlet located cater-cornered from said air inlet such that said ATCA chassis is configured to allow an air flow along a diagonal predominant air flow path through said ATCA chassis; and
at least one circuit board disposed in said ATCA chassis, said at least one circuit board including a plurality of components coupled to said circuit board, at least one of said components being aligned with said diagonal predominant air flow path when said circuit board is positioned in said ATCA chassis.
23. The system of claim 22 wherein said components include a plurality of skewed components coupled to said circuit board such that edges of said components are obliquely oriented relative to edges of said circuit board and aligned with said diagonal predominant air flow path.
24. The system of claim 22 wherein said at least one of said components includes at least one heat sink including fins aligned with said diagonal predominant air flow path.
25. The system of claim 24 wherein said fins are angled obliquely relative to an edge of said heat sink within a range of angles of about 45\xb0\xb120\xb0.