Hermetically resealable hard-disk drive configured for recharging with a low-density gas

Abstract

A hermetically resealable hard-disk drive (HDD) configured for recharging with a low-density gas. The hermetically resealable HDD includes a disk enclosure (DE), a magnetic-recording disk, a head-slider, an actuator, a low-density gas, a through-hole, and a plug. The DE includes a base, and a first cover and a second cover joined to the base. The second cover is disposed above the first cover. The through-hole is configurable for injection of a low-density gas into the DE. The low-density gas, having a density less than air, substantially fills the DE. The plug is press-fitted into, and hermetically seals, the through-hole. The plug is removable to allow recharging the DE with the low-density gas; and, the through-hole is configured to accept a resealing plug to be press-fit into, and to reseal hermetically, the through-hole after recharging. A method for injecting low-density gas into, and sealing, the hermetically resealable HDD is also provided.

Description

technical field [0001] Embodiments of the present invention relate to a hermetically resealable hard disk drive (HDD) configured to be refilled with a low density gas. Background technique [0002] In recent years, in order to meet market demands for increased capacity, higher recording density, and high-speed data access, hard disk drives (HDDs) rotate magnetic recording disks and drive head gimbal assemblies (HGAs) at faster speeds than in the past ) to access data stored on a magnetic recording disk. Therefore, mitigation of air turbulence impinging on the magnetic recording disk and HGA has become an issue in HDD design. Impact due to this turbulence may adversely affect the positioning of the magnetic recording head in accessing data recorded on the magnetic recording disk at a high recording density. Because this turbulence occurs randomly, it has become complicated and difficult to estimate the magnitude and frequency of the resulting HGA perturbations for fast and ...

AI Technical Summary

Problems solved by technology

The impact of this turbulence may adversely affect the positioning of the magnetic recording head in accessing data recorded on a magnetic recording disk at high recording densities.

Because this turbulence occurs randomly, it has become complicated and difficult to estimate the magnitude and frequency of the resulting HGA perturbations for fast and precise positioning of the magnetic recording head

Also, the impact due to this turbulence can cause noise and impair the quiet operation of the HDD

[0003] In addition, when the magnetic recording disk rotates at a high speed, the presence of air inside the HDD causes an increase in power consumption because the air located adjacent to the magnetic recording disk is dragged and rotates together with the magnetic recording disk.

Conversely, the air farther from the magnetic recording disk remains still, so that the shear force that occurs between this still air and the air moving with the magnetic recording disk becomes an additional burden affecting the rotation of the magnetic recording disk

The increased power consumption caused by these shear forces is called windage loss, which becomes greater as the magnetic recording disk rotates at faster speeds

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