Apparatus, system, and method for directing air in a storage-system chassis

1. A cold-air bypass apparatus comprising:

one or more mounting surfaces configured to couple the cold-air bypass apparatus to a drive-plane board configured to be housed within a storage-system chassis, wherein:

the storage-system chassis comprises a front through which air is able to pass, a left side through which substantially no air is able to pass, a right side through which substantially no air is able to pass, and a rear through which air is able to pass;

a fan directs an airflow rearward through the chassis, the airflow comprising a first portion and a second portion; and

the drive-plane board comprises:

a front drive section located on a top side of the drive-plane board, the front drive section comprising a first plurality of storage-drive connectors coupled to the drive-plane board;

a rear drive section located on the top of the drive-plane board, the rear drive section comprising a second plurality of storage-drive connectors coupled to the drive-plane board, wherein:

the first portion of the airflow cools the front drive section and the rear drive section; and

the second portion of the airflow substantially avoids cooling the front drive section by passing under the drive-plane board; and

an opening located between the front drive section and the rear drive section that allows air to flow from below the drive-plane board to above the drive-plane board; and

a baffle configured to combine the second portion of the airflow with the first portion of the airflow by directing the second portion of the airflow through the opening from below the drive-plane board to above the drive-plane board so that the second portion of the airflow and the first portion of the airflow combine to cool the rear drive section.

2. The cold-air bypass apparatus of claim 1 , wherein the baffle is further configured to prevent substantially any of the airflow from flowing under the drive-plane board past the opening.

3. The cold-air bypass apparatus of claim 1 , wherein:

the drive-plane board comprises:

a front printed circuit board that comprises the front drive section; and

a rear printed circuit board electrically coupled to the front printed circuit board, the rear printed circuit board comprising the rear drive section; and

the opening is a gap located between the front printed circuit board and the rear printed circuit board.

4. The cold-air bypass apparatus of claim 3 , wherein:

the baffle and the one or more mounting surfaces are formed from a single injection-molded part comprised of rigid plastic; and

the one or more mounting surfaces are:

coupled to the front printed circuit board and the rear printed circuit board; and

configured to rigidly tie the front printed circuit board to the rear printed circuit board.

5. The cold-air bypass apparatus of claim 1 , further comprising an additional baffle configured to:

direct an additional portion of the airflow through an additional opening in the drive-plane board from below the drive-plane board to above the drive-plane board; and

prevent substantially any of the airflow from flowing under the drive-plane board past the additional opening.

6. The cold-air bypass apparatus of claim 5 , wherein:

the drive-plane board comprises:

a front printed circuit board that comprises the front drive section; and

a rear printed circuit board coupled to the front printed circuit board, the rear printed circuit board comprising the rear drive section;

the opening is a gap located between the front printed circuit board and the rear printed circuit board; and

the additional opening is an additional gap located between the front printed circuit board and the rear printed circuit board.

7. The cold-air bypass apparatus of claim 6 , wherein:

the baffle and the one or more mounting surfaces are formed from a first injection-molded part comprised of rigid plastic;

the one or more mounting surfaces are:

coupled to a left side of the front printed circuit board and a left side of the rear printed circuit board; and

configured to rigidly tie the left side of the front printed circuit board to the left side of the rear printed circuit board;

the additional baffle and an additional one or more mounting surfaces are formed from a second injection-molded part comprised of rigid plastic; and

the additional one or more mounting surfaces are:

coupled to a right side of the front printed circuit board and a right side of the rear printed circuit board; and

configured to rigidly tie the right side of the front printed circuit board to the right side of the rear printed circuit board.

8. The cold-air bypass apparatus of claim 5 , further comprising a third baffle that extends from the left side of the chassis to the right side of the chassis, the third baffle configured to:

retain the second portion of the airflow against the drive-plane board;

direct the second portion of the airflow to the baffle;

retain the additional portion of the airflow against the drive-plane board; and

direct the additional portion of the airflow to the additional baffle.

9. The cold-air bypass apparatus of claim 1 , further comprising two or more finger holds that enable a technician to grasp and remove the drive-plane board from the chassis.

10. The cold-air bypass apparatus of claim 1 , wherein the baffle comprises a duct through which the second portion of the airflow is able to pass.

11. A storage-system drawer comprising:

a chassis comprising a front through which air is able to pass, a left side through which substantially no air is able to pass, a right side through which substantially no air is able to pass, and a rear through which air is able to pass;

a fan that directs an airflow rearward through the chassis, the airflow comprising a first portion and a second portion;

a drive-plane board comprising:

a front drive section located on a top side of the drive-plane board, the front drive section comprising a first plurality of storage-drive connectors coupled to the drive-plane board;

a rear drive section located on the top of the drive-plane board, the rear drive section comprising a second plurality of storage-drive connectors coupled to the drive-plane board, wherein:

the first portion of the airflow cools the front drive section and the rear drive section; and

the second portion of the airflow substantially avoids cooling the front drive section by passing under the drive-plane board; and

an opening located between the front drive section and the rear drive section that allows air to flow from below the drive-plane board to above the drive-plane board; and

a cold-air baffle configured to combine the second portion of the airflow with the first portion of the airflow by directing the second portion of the airflow through the opening from below the drive-plane board to above the drive-plane board so that the second portion of the airflow and the first portion of the airflow combine to cool the rear drive section.

12. The storage-system drawer of claim 11 , wherein the cold-air baffle is further configured to prevent substantially any of the airflow from flowing under the drive-plane board past the opening.

13. The storage-system drawer of claim 11 , wherein:

the drive-plane board comprises:

a front printed circuit board that comprises the front drive section; and

a rear printed circuit board electrically coupled to the front printed circuit board, the rear printed circuit board comprising the rear drive section; and

the opening is a gap located between the front printed circuit board and the rear printed circuit board.

14. The storage-system drawer of claim 13 , wherein the cold-air baffle is:

comprised of rigid plastic;

coupled to the front printed circuit board and the rear printed circuit board; and

configured to rigidly tie the front printed circuit board to the rear printed circuit board.

15. The storage-system drawer of claim 11 , further comprising an additional cold-air baffle configured to:

direct an additional portion of the airflow through an additional opening in the drive-plane board from below the drive-plane board to above the drive-plane board; and

prevent substantially any of the airflow from flowing under the drive-plane board past the additional opening.

16. The storage-system drawer of claim 15 , wherein:

the drive-plane board comprises:

a front printed circuit board that comprises the front drive section; and

a rear printed circuit board coupled to the front printed circuit board, the rear printed circuit board comprising the rear drive section;

the opening is a gap located between the front printed circuit board and the rear printed circuit board; and

the additional opening is an additional gap located between the front printed circuit board and the rear printed circuit board.

17. The storage-system drawer of claim 16 , wherein the cold-air baffle and the additional cold-air baffle are each:

comprised of rigid plastic;

coupled to the front printed circuit board and the rear printed circuit board; and

configured to rigidly tie the front printed circuit board to the rear printed circuit board.

18. The storage-system drawer of claim 11 , wherein the fan is coupled to the rear of the chassis and pulls the airflow from the front of the chassis to the rear of the chassis.

19. The storage-system drawer of claim 11 , wherein the cold-air baffle comprises two or more finger holds that enable a technician to grasp and remove the drive-plane board from the chassis.

20. A method comprising:

electrically coupling a front drive-plane board to a rear drive-plane board, wherein:

the front drive-plane board comprises a front drive section located on a top side of the front drive-plane board, the front drive section comprising a first plurality of storage-drive connectors coupled to the front drive-plane board;

the rear drive-plane board comprises a rear drive section located on the top of the rear drive-plane board, the rear drive section comprising a second plurality of storage-drive connectors coupled to the rear drive-plane board; and

a gap is located between the front drive-plane board and the rear drive-plane board;

coupling a cold-air baffle to the front drive-plane board and the rear drive-plane board such that the cold-air baffle is capable of directing a portion of an airflow that passes under the front drive-plane board through the gap to above the rear drive-plane board; and

installing the front drive-plane board and the rear drive-plane board within a storage-system chassis.