Electromagnetically-shielded portable storage device
Electromagnetically shielded portable storage devices are disclosed. One such device includes an electromagnetically shielded enclosure having an interior volume, the electromagnetically shielded enclosure including a plurality of shielded walls and sized to be manually carried by a person. The interior volume of the enclosure is isolated from high-frequency electromagnetic energy generated external to the enclosure. The device includes at least one storage device positioned within the interior volume, and at least one communicative connection extending from the at least one storage device to a communicative socket accessible external to the electromagnetically shielded enclosure. The at least one communicative connection is configured to allow access to the storage device by a computing system external to the electromagnetically shielded enclosure. The device also includes an electrical filter positioned at least partially within the electromagnetically shielded enclosure, and including a low-pass filter selected to prevent spurious or intentional conductive high-frequency electromagnetic energy from entering the interior volume via the communicative connection.
1. An electromagnetically shielded portable storage device comprising:
an electromagnetically shielded enclosure having an interior volume, the electromagnetically shielded enclosure including a plurality of shielded walls and sized to be manually carried by a person, the interior volume isolated from high-frequency electromagnetic energy generated external to the enclosure;
at least one storage device positioned within the interior volume;
at least one communicative connection extending from the at least one storage device to a communicative socket accessible external to the electromagnetically shielded enclosure, the at least one communicative connection configured to allow access to the storage device by a computing system external to the electromagnetically shielded enclosure;
an electric filter positioned at least partially within the electromagnetically shielded enclosure, the electric filter including a low-pass filter selected to prevent spurious or intentional conductive high-frequency electromagnetic energy from entering the interior volume via the communicative connection.
2. The electromagnetically shielded portable storage device of claim 1 , further comprising an array of storage devices communicatively interconnected and positioned within the interior volume.
3. The electromagnetically shielded portable storage device of claim 2 , further comprising a disk controller within the interior volume, the disk controller configured to receive data via the communicative connection and store that data on one or more of the array of storage devices.
4. The electromagnetically shielded portable storage device of claim 3 , further comprising a power connection including an electrical power cable having at least a portion residing externally to the electromagnetically shielded enclosure, the power connection further comprising a power filter positioned along a perimeter of the electromagnetically shielded enclosure and arranged to filter high-frequency energy on the portion of the electrical power cable external to the electromagnetically shielded enclosure.
5. The electromagnetically shielded portable storage device of claim 4 , wherein the power connection provides electrical power to the array of storage devices and the disk controller.
6. The electromagnetically shielded portable storage device of claim 4 , further comprising a vent through at least one of the shielded walls, allowing airflow through the electromagnetically shielded enclosure.
7. The electromagnetically shielded portable storage device of claim 6 , further comprising a waveguide-beyond-cutoff frequency positioned across the vent, the waveguide beyond cutoff having a plurality of cells sized to filter radiative high-frequency electromagnetic energy, thereby preventing the electromagnetic energy from passing through the vent.
8. The electromagnetically shielded portable storage device of claim 1 , wherein the electric filter is positioned at a periphery of the electromagnetically shielded enclosure.
9. The electromagnetically shielded portable storage device of claim 1 , further comprising a second interior volume within the electromagnetically shielded enclosure, the second interior volume defining an unshielded region within the enclosure.
10. The electromagnetically shielded portable storage device of claim 1 , wherein the electromagnetically shielded enclosure is less than about 10 inches wide by about 10 inches tall by about 12 inches deep.
11. The electromagnetically shielded portable storage device of claim 1 , wherein the electromagnetically shielded enclosure is sized to fit within one or more rack units of a server rack.
12. An electromagnetically shielded portable storage device comprising:
A handheld-sized electromagnetically shielded enclosure having an interior volume, the electromagnetically shielded enclosure including a plurality of shielded walls, the interior volume isolated from radiative high-frequency electromagnetic energy generated external to the enclosure;
a storage device positioned within the interior volume;
a communicative connection extending from the at least one storage device to a communicative socket accessible external to the electromagnetically shielded enclosure, the at least one communicative connection configured to allow connection of the storage device to a computing system;
an energy filter positioned at least partially within the electromagnetically shielded enclosure, the energy filter including a low-pass filter selected to prevent spurious or intentional conductive high-frequency electromagnetic energy from entering the interior volume via the communicative connection.
13. The electromagnetically shielded portable storage device of claim 12 , wherein the communicative connection comprises a Universal Serial Bus (USB) connection.
14. The electromagnetically shielded portable storage device of claim 12 , wherein the storage device comprises a flash memory storage device.
15. The electromagnetically shielded portable storage device of claim 12 , further comprising a second interior volume within the electromagnetically shielded enclosure, the second interior volume defining an unshielded region within the enclosure.
16. The electromagnetically shielded portable storage device of claim 15 , wherein the handheld-sized electromagnetically shielded enclosure has exterior dimensions less than or equal to about 3.5 inches wide, 2 inches tall, and 6 inches deep.
17. The electromagnetically shielded portable storage device of claim 15 , further comprising a serial data connection extending from the communicative connection to an exterior of the electromagnetically shielded enclosure, thereby providing communicative connection to the storage device.
18. An electromagnetically shielded network-attached storage device comprising:
an electromagnetically shielded enclosure having an interior volume, the electromagnetically shielded enclosure including a plurality of shielded walls and sized to be manually carried by a person, the interior volume isolated from radiative high-frequency electromagnetic energy generated external to the enclosure;
a plurality of storage devices positioned in a storage device array within the interior volume;
a disk controller within the interior volume, the disk controller configured to receive data via the communicative connection and store that data on one or more of the array of storage devices;
a power connection comprising:
an electrical power cable having at least a portion residing externally to the electromagnetically shielded enclosure; and
a power filter positioned along a perimeter of the electromagnetically shielded enclosure and arranged to filter high-frequency energy on the portion of the electrical power cable external to the electromagnetically shielded enclosure;
at least one communicative connection comprising:
a communicative socket accessible external to the electromagnetically shielded enclosure and configured to allow communication with the disk controller by a computing system external to the electromagnetically shielded enclosure;
an electric filter at least partially positioned within the electromagnetically shielded enclosure and including a low-pass filter selected to prevent spurious or intentional conductive high-frequency electromagnetic energy from entering the interior volume via the communicative connection; and
one or more vents through at least one of the shielded walls, each vent including a waveguide-beyond-cutoff positioned across the vent, the waveguide beyond cutoff having a plurality of openings sized to filter radiative electromagnetic energy below a design frequency associated with an electromagnetic event passing through the vent.
19. The electromagnetically shielded network-attached storage device of claim 18 , wherein the at least one communicative connection includes an Ethernet connection.
20. The electromagnetically shielded network-attached storage device of claim 18 , wherein the at least one communicative connection includes a fiberoptic connection.