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Indirect data structures for managing file system metadata

A file system and data structure technology, applied in file systems, file access structures, special data processing applications, etc.

Active Publication Date: 2021-06-25
WESTERN DIGITAL TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as hard drive densities increase and SMR drives become more prevalent, storage of metadata for SMR zones can be challenging

Method used

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  • Indirect data structures for managing file system metadata
  • Indirect data structures for managing file system metadata
  • Indirect data structures for managing file system metadata

Examples

Experimental program
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Embodiment Construction

[0017] Storage devices such as hard disk drives and solid state drives are often used in computing systems to store data objects for the host processing system. These data objects often include audio files, video files, word documents, spreadsheets, images, or any other type of file. In order for a storage device to be available to a host processing system, the storage device must be communicatively linked to the host processing system to enable communication between the two systems. The communication link may include: a Small Computer System Interface (SCSI) bus, a Serial Attached SCSI (SAS) bus, a Serial ATA (SATA) bus, a Peripheral Component Interconnect Express (PCIe) bus, Fiber Channel, or some other similar interface or bus.

[0018] In this example, the storage device includes a perpendicular magnetic recording (PMR) region or some other non-shingled track type recording region and a shingled magnetic recording (SMR) region. The PMR zone reads and writes data to separ...

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PUM

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Abstract

Systems, methods, and software for managing file system metadata in data storage devices are described herein. In one example, a data storage device includes a first storage area, a shingled magnetic recording (SMR) area, and a storage control system. The storage control system is configured to maintain file system metadata in metadata locations of the first storage region for user data in the SMR region. The storage control system is further configured to identify a metadata location in the SMR zone to redirect and store the file system metadata in response to a usage condition satisfied by the file system metadata in the metadata location. The storage control system is further configured to: maintain an indirect data structure in the metadata location of the first zone that associates the metadata location in the SMR zone to the file system metadata.

Description

technical field [0001] The present invention relates to the field of data storage. Background technique [0002] Storage devices such as hard disk drives and solid-state drives provide a storage medium for the host processing system to store and read various data objects. These data objects may include images, videos, word documents, spreadsheets, and various other file types capable of being processed by the host processing system. To make the storage medium available to the host system, the Small Computer System Interface (SCSI) bus, Serial Attached SCSI (SAS) bus, Serial ATA (SATA) bus, Peripheral Component Interconnect Express (PCIe) bus, Fiber Channel Or some other similar interface or bus to communicatively couple one or more of the storage devices to the system. [0003] In some examples, hard disk drives may include a combination of perpendicular magnetic recording (PMR) regions and shingled magnetic recording (SMR) regions. The PMR area reads and writes data to s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F16/13
CPCG06F16/13
Inventor D·勒莫尔
Owner WESTERN DIGITAL TECH INC
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