Devices and methods for metal organic framework (MOF) based oxygen replenishment in data storage devices
A data storage device may include an enclosure and a metal organic framework (MOF) container situated within an enclosure interior. The MOF container contains a MOF configured to store captive molecular units and to release the captive molecular units in gaseous form into the enclosure interior. A method of manufacturing the data storage device may include charging the MOF, attaching the MOF container to the enclosure interior, and sealing the enclosure after attaching the MOF container to the interior of the enclosure. A method of adjusting an amount of gas in a sealed data storage device may comprise including a MOF container within an interior of the sealed data storage device, the MOF container containing a MOF, charging the MOF, and, after the sealed data storage device has been placed into service, the MOF releasing captive molecular units into the interior of the sealed data storage device.
1. A data storage device, comprising:
a sealed enclosure;
a spindle motor situated within an interior of the sealed enclosure;
a metal organic framework (MOF) container situated within the interior of the sealed enclosure, wherein the MOF container contains a MOF configured to store captive molecular units and to release the captive molecular units in gaseous form into the interior of the sealed enclosure;
a heater situated within the interior of the sealed enclosure, wherein the heater is configured to heat the MOF; and
a controller coupled to the heater, wherein the controller is configured to set or adjust a heat output of the heater based at least in part on an indication of an amount or concentration of a gas within the interior of the sealed enclosure, the indication of the amount or concentration of the gas within the interior of the sealed enclosure being based at least in part on one or more of: a current of the spindle motor, a power consumption of the spindle motor, a proxy for the current of the spindle motor, or a proxy for the power consumption of the spindle motor.
2. The data storage device recited in claim 1 , wherein the captive molecular units comprise oxygen (O 2 ).
3. The data storage device recited in claim 1 , wherein the MOF comprises at least one of: Cu-BTC, MIL-101 Composite, UMCM-152 (ANUGIA), or Mg-MOF-74.
4. The data storage device recited in claim 1 , wherein
the MOF container comprises a permeable membrane and/or orifice configured to allow the captive molecular units to exit the MOF container.
5. The data storage device recited in claim 1 , wherein the indication is a first indication of the amount or concentration of the gas within the interior of the sealed enclosure, and further comprising a sensor communicatively coupled to the controller, and wherein the controller is further configured to obtain a second indication of the amount or concentration of the gas within the interior of the sealed enclosure from the sensor.
6. The data storage device recited in claim 1 , wherein the controller is further configured to control the heater by setting or adjusting the heat output of the heater based at least in part on an indication of a temperature within the interior of the sealed enclosure.
7. The data storage device recited in claim 1 , further comprising:
a recording medium situated within the interior of the sealed enclosure; and
a heat-assisted magnetic recording (HAMR) head situated within the sealed enclosure and configured to record data to and read data from the recording medium.
8. A method of manufacturing the data storage device recited in claim 1 , the method comprising:
charging the MOF;
before sealing the sealed enclosure, attaching the MOF container to the interior of the sealed enclosure; and
sealing the sealed enclosure after attaching the MOF container to the interior of the sealed enclosure.
9. A method of adjusting an amount of gas in a sealed data storage device, the method comprising:
including a metal organic framework (MOF) container within an interior of the sealed data storage device, the MOF container containing a MOF;
charging the MOF; and
after the sealed data storage device has been placed into service:
obtaining an estimated current gas level in the interior of the sealed data storage device, wherein obtaining the estimated current gas level in the interior of the sealed data storage device comprises obtaining an indication of a spindle motor current or a spindle motor power consumption;
at least in part in response to the estimated current gas level in the interior of the sealed data storage device, a controller of the sealed data storage device causing a heater of the sealed data storage device to heat the MOF container; and
the MOF releasing captive molecular units into the interior of the sealed data storage device at least in part in response to the heating of the MOF container.
10. The method of claim 9 , wherein the controller of the sealed data storage device causing the heater of the sealed data storage device to heat the MOF container is at least in part in response to the estimated current gas level in the interior of the sealed data storage device being below a threshold.
11. The method of claim 9 , wherein the controller of the sealed data storage device causing the heater of the sealed data storage device to heat the MOF container is further based at least in part on a model.
12. The method of claim 11 , wherein the model accounts for a material in the MOF.
13. The method of claim 12 , wherein the model also accounts for at least one of (a) an operating temperature of the sealed data storage device, (b) an operating time of the sealed data storage device, or (c) an expected lifetime of the sealed data storage device.
14. The method of claim 9 , further comprising subjecting the MOF to a magnetic field, and wherein the MOF releasing the captive molecular units into the interior of the sealed data storage device is further in response to subjecting the MOF to the magnetic field.
15. The method of claim 9 , further comprising exposing the MOF to light, and wherein the MOF releasing the captive molecular units into the interior of the sealed data storage device is further in response to exposing the MOF to the light.
16. The method of claim 9 , further comprising:
recharging or replacing the MOF.
17. The data storage device recited in claim 4 , wherein a pressure inside the MOF container exceeds a pressure in the interior of the sealed enclosure.