Hot swapping technique for expansion cards
One embodiment of the present disclosure set forth a system for hot swapping an expansion card. The system includes a fastener mechanism for coupling an expansion card to a motherboard. The system further includes a switch for controlling voltage supply to the expansion card. When the fastener mechanism is in an activated state, the fastener mechanism secures the expansion card to the motherboard and the switch causes voltage to be supplied to the expansion card. When the fastener mechanism is in a partially activated state, the fastener mechanism secures the expansion card to the motherboard and the switch prevents voltage from being supplied to the expansion card.
1. An apparatus for hot swapping an expansion card, the apparatus comprising:
a fastener mechanism for coupling an expansion card to a motherboard,
a switch for controlling voltage supply to the expansion card,
wherein, when the fastener mechanism is in an activated state, the fastener mechanism secures the expansion card to the motherboard and the switch causes voltage to be supplied to the expansion card, and
wherein, when the fastener mechanism is in a partially activated state, the fastener mechanism secures the expansion card to the motherboard and the switch prevents voltage from being supplied to the expansion card.
2. The apparatus of claim 1 , wherein, when the fastener mechanism is in the deactivated state, the expansion card is unsecured and the switch prevents voltage from being supplied to the expansion card.
3. The apparatus of claim 1 , wherein the fastener mechanism includes a primary fastener and a secondary fastener that each independently secure the expansion card to the motherboard when in a sub-component activated state.
4. The apparatus of claim 3 , wherein, when the fastener mechanism is in the activated state, the primary fastener and the secondary fastener are in the sub-component activated state.
5. The apparatus of claim 3 , wherein the switch causes voltage to be supplied to the expansion card only when the primary fastener is in the sub-component activated state.
6. The apparatus of claim 3 , wherein, when the fastener mechanism is in the partially activated state, the primary fastener is in the sub-component deactivated state and the secondary fastener is in the sub-component activated state.
7. The apparatus of claim 3 , wherein the primary fastener comprises a screw and the secondary fastener comprises a spring, and wherein, when the primary fastener is in the sub-component activated state, a screw head of the screw covers an area of the expansion card.
8. The apparatus of claim 1 , further comprising:
an indicator mechanism coupled to the voltage supply,
wherein, when voltage is supplied to the expansion card, the indicator mechanism generates a first indication, and, when voltage is not supplied to the expansion card, the indicator mechanism generates a second indication.
9. The apparatus of claim 1 , further comprising a sensor that detects when the fastener mechanism is in the activated state or the partially activated state.
10. The apparatus of claim 1 , wherein a first voltage source and a second voltage source supply voltage to the expansion card, and wherein the switch controls voltage supply only from the first voltage source.
11. A system for hot swapping an expansion card, the system comprising:
a motherboard;
an expansion card; and
a fastening mechanism for coupling the expansion card to the motherboard, wherein a first component of the fastening mechanism secures the expansion card to the motherboard for a temporary period after a second component of the fastening mechanism releases the expansion card.
12. The system of claim 11 , further comprising a switch that controls a first voltage supply to the expansion card.
13. The system of claim 12 , wherein, when the second component releases the expansion card, the switch prevents the first voltage supply from supplying voltage to the expansion card.
14. The system of claim 13 , further comprising a capacitor that supplies a voltage to the expansion card for a limited time after the switch prevents the first voltage supply from supplying voltage to the expansion card.
15. The system of claim 11 , wherein the first component comprises a spring and the second component comprises a screw.
16. The system of claim 11 , further comprising:
an indicator mechanism coupled to the voltage supply,
wherein, when voltage is supplied to the expansion card, the indicator mechanism generates a first indication, and, when voltage is not supplied to the expansion card, the indicator mechanism generates a second indication.
17. The system of claim 11 , further comprising a sensor that detects when the second component releases the expansion card.
18. The system of claim 11 , wherein the sensor transmits a notification to a processing unit coupled to the expansion card upon detecting that the second component has released the expansion card.
19. A method for hot swapping an expansion card, the method comprising:
receiving a notification that a fastener mechanism has been released, wherein the fastener mechanism secures an expansion card to a motherboard;
causing one or more in-flight I/O operations associated with the expansion card to be completed; and
preventing additional input/output operations from being transmitted to the expansion card.
20. The method of claim 19 , wherein, during a temporary period after the fastener mechanism has been released, voltage is supplied to the expansion card from a secondary voltage source independent of a primary voltage source controlled by the fastening mechanism.