System and method for reduced vibration interaction in a multiple-disk-drive enclosure

A technology of disk drive and row disk drive, which is applied to the installation of electrical equipment shells/cabinets/drawers, electrical components, support structures, etc., and can solve problems such as increasing data complexity and long cable lines

Inactive Publication Date: 2007-02-28
SHERWOOD INFORMATION PARTNERS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, positioning multiple disk drives in separate locations increases the complexity of retrieving data from the disk drives due to the need

Method used

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  • System and method for reduced vibration interaction in a multiple-disk-drive enclosure
  • System and method for reduced vibration interaction in a multiple-disk-drive enclosure
  • System and method for reduced vibration interaction in a multiple-disk-drive enclosure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment A1

[0142] Example A1 - Mirror Focused Counter-Rotating Disk Drive to Cancel Rotational Acceleration Vibration (RAV)

[0143]A "mirrored disk" is a group of M (where: M is 2 or greater) disk drives that are logically concatenated as a group, and for each write operation, at least some of the data written to the logical group is copied to each of the M drives. In some embodiments, all data sent to the set of drives is replicated; while in other embodiments, a certain amount (e.g., 150GB) or a certain percentage Of the drives data space (eg, 50%) is mirrored, the rest of the data on each drive is unique or different, while also providing lower cost per gigabyte for other data by only writing a single copy. In some embodiments, the processor element (PE) or operating system (OS) can see a set of four 300GB drives as one 150GB quad mirrored drive, plus four 150GB each non-mirrored drives. In some embodiments, a certain portion or proportion of data is copied more copies (e.g., a set...

Embodiment A2

[0144] Example A2 - Counterspinning disk drives in a mirrored set to at least partially offset RAV, optionally also using read striping

[0145] Again, each write operation is sent to all M drives, so each drive has a copy of all data. In some embodiments, each read operation is sent to only one of the M drives, so the other drives have less use and can accept read operations to retrieve other data. This provides increased reliability of replicated data and increases read performance as more drives are able to perform separate read operations simultaneously. Furthermore, as shown in Figure 4A, the drives are alternately placed back-to-back or face-to-face so that one half of the drives rotates in the opposite direction as the other half. Since all write seek operations (only for writes) are sent to all M drives of the set, the rotational acceleration of the write seek operations cancels out, at least to some extent. Furthermore, it is probable that a read seek operation to o...

Embodiment A3

[0148] Example A3 - Alternation of counter-rotating disks in stripe sets to counteract RAV

[0149] A "striped disk" is a group of N disk drives logically connected as a group, and data written to the logical group is spread across the group. At some granularity, a data block is divided into sub-blocks, where: each successive sub-block is written to a different drive. So instead of waiting in a serial fashion for the block to be completely written to or read from one drive, groups of drives work in parallel, each writing or reading their portion of the block. The system's processor sees or can view a striped disk group as a single logical disk drive whose capacity is the sum of the capacities of all drives in the group, and where: each contiguous block of data (where a block can be of any suitable size, such as 512 bytes, 8192 bytes, or any other desired size) are written to different drives (for N drives, every Nth block is written to the first drive, every N+1th block is wr...

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PUM

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Abstract

A system and method for an improved multiple hard-disk-drive data-storage enclosure. Some embodiments position drives in counter-rotating pairs, each simultaneously accessing half the data, such that seek-caused actuator rotational-acceleration vibration cause simultaneous canceling rotational torque. Some embodiments position the edge of a first drive (or drive pair) at an angle to the actuator midpoint of a nearby second drive (or drive pair), such that rotational-acceleration vibration from a seek-caused actuator rotation in the first drive does not cause a rotational movement into the second drive that affects the tracking or seek operation. Some further embodiments position drives in a herringbone pattern to redirect air flow in addition to reducing rotational-acceleration vibration interaction. Other embodiments include a printed wire circuit board mounted to reduce the rotational-acceleration vibration interaction.

Description

[0001] References to related applications [0002] This application claims the benefit of US Provisional Patent Application 60 / 580,987, filed June 18, 2004, and US Provisional Patent Application 60 / 533,605, filed December 29, 2003, the entire contents of which are hereby incorporated by reference. technical field [0003] The present invention relates to hard disk drive data storage systems and methods; and more particularly, the present invention relates to enclosures (enclosures) that accommodate a large number of hard disk drives and provide a large number of serial data interfaces that operate in parallel, resulting, among other things, in improved performance, reliability, manufacturing costs and / or operating costs. Background technique [0004] Many emerging and real-world applications require large-capacity data storage. For example, a video-on-demand application that can simultaneously provide hundreds of thousands of users with access to hundreds of movies requires...

Claims

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Application Information

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IPC IPC(8): H05K7/14H05K5/00H01R12/16
Inventor 埃里科·J·温德尔乔纳森·E·霍尔丹尼尔·M·MC－考米克查尔斯·A·莱麦尔
Owner SHERWOOD INFORMATION PARTNERS
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