Tapped interposer for connecting disk drive to chassis
Interposers for tapping a signal. An interposer can include an interposer printed circuit board, an output connector that couples the interposer circuit board with a backplane connector of a chassis, an input connector for coupling the interposer circuit board with a disk drive, tapping circuitry for tapping a high-speed differential signal, and connectors coupled to the tapping circuitry for transmitting the tapped signal to an analyzer or an oscilloscope.
1. An interposer, comprising:
a printed circuit board;
an output connector for coupling the printed circuit board with a backplane connector of a chassis;
an input connector for coupling the printed circuit board with a disk drive;
tapping circuitry for tapping a signal; and
a first pair of connectors coupled to the tapping circuitry for transmitting the tapped signal, and the interposer including a digital pass through mode.
2. An interposer as defined in claim 1 , wherein the disk drive is a Fibre Channel disk drive.
3. An interposer as defined in claim 1 , wherein the first pair of connectors are SMA connectors.
4. An interposer as defined in claim 1 , further comprising:
a second pair of connectors coupled to the tapping circuitry for viewing tapped signals transmitted in a direction opposite to that viewed by the first pair of connectors.
5. An interposer as defined in claim 4 , further comprising:
a third pair of connectors and a fourth pair of connectors for reinserting data into the data path.
6. An interposer as defined in claim 1 , wherein the first pair of connectors is a pair of SFP connectors.
7. An interposer as defined in claim 1 , wherein:
the output connector is a SCA-2 straddle mount output connector that couples the interposer circuit board with the backplane connector of the chassis; and
the input connector is a SCA-2 vertical receptacle input connector for coupling the interposer circuit board with the disk drive.
8. An interposer as defined in claim 1 , wherein the output connector is a serial attached SCSI (SAS) output connector that couples the interposer circuit board with a SAS backplane connector of the chassis; and
the input connector is a SAS vertical receptacle input connector for coupling the interposer circuit board with a SAS drive.
9. An interposer as defined in claim 1 , wherein the interposer includes an analog pass-through mode that copies the high-speed serial data and sends one copy of the high-speed serial data to the original destination and another copy of the high-speed serial data to the first pair of connectors.
10. An interposer as defined in claim 1 , wherein the interposer further includes an analog pass through mode, the interposer being switchable between the analog pass through mode and the digital pass through mode.
11. An interposer as defined in claim 1 , further comprising:
a first port of a fiber channel data path for receiving a data stream; and
a second port of the fiber channel data path for receiving a data stream.
12. An interposer as defined in claim 1 , further comprising:
one centimeter in length pads on a horizontal portion of the printed circuit board aligned with one centimeter in length pads on a vertical portion of the printed circuit board, wherein the interposer includes traces allowing for signals to traverse from the horizontal portion of the printed circuit board aligned to the vertical portion of the printed circuit board.
13. An interposer as defined in claim 1 , wherein the interposer is powered from a power being passed between a Host and the disk drive.
14. An interposer as defined in claim 1 , further comprising means for supporting the interposer within a chassis.
15. An interposer as defined in claim 1 , further comprising circuitry configured to force a certain transmission speed in the drive.
16. An interposer comprising:
a horizontal printed circuit board;
a vertical printed circuit board;
electrical connections coupling the horizontal printed circuit board to the vertical printed circuit board;
an output interface for coupling the interposer to a backplane connector of a chassis;
an input interface for coupling the interposer to a disk drive;
a tapping circuit for tapping a signal; and
means for coupling the interposer to an analyzer or an oscilloscope; and
circuitry configured to force a certain transmission speed in the disk drive.
17. An interposer as defined in claim 16 wherein the means for coupling the interposer to an analyzer or an oscilloscope is at least one connector.
18. An interposer as defined in claim 16 , wherein the at least one connector is at least one of a SFP connector or a SMA connector.
19. An interposer as defined in claim 16 wherein the interposer includes both an analog and a digital pass through mode.
20. An interposer as defined in claim 16 , wherein the interposer includes two ports and a switch for selecting whether the data from the first port or from the second port is routed to a pair of connectors.
21. An interposer as defined in claim 16 , wherein the interposer receives power from a Host or a disk drive.
22. An interposer as defined in claim 16 , wherein:
the output interface is a serial attached SCSI (SAS) output connector; and
the input interface is a SAS vertical receptacle input connector for coupling the interposer circuit board with a SAS drive.
23. An interposer as defined in claim 16 , further comprising:
an adjustable support device for supporting the interposer within a chassis, the adjustable support device comprising extendable arms for engaging opposing inner walls of the chassis.
24. An interposer as defined in claim 16 , wherein the circuitry configured to force a certain transmission speed in the disk drive includes various settings for allowing different speeds, and further includes a “normal” setting.
25. An interposer comprising:
a horizontal printed circuit board;
a vertical printed circuit board;
electrical connections coupling the horizontal printed circuit board to the vertical printed circuit board;
an output interface for coupling the interposer to a backplane connector of a chassis;
an input interface for coupling the interposer to a disk drive;
circuitry enabling a user to select between an analog pass through mode and a digital pass through mode;
a tapping circuit for tapping a signal;
at least one connector for coupling the interposer to an attached device for analyzing the tapped signal; and
a power connection coupled to at least one of a Host and the disk drive, wherein the interposer receives power from the Host or from the disk drive.