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Storage systems implementing offset erasure code stripes

專利號(hào)
US11175986B1
公開日期
2021-11-16
申請(qǐng)人
International Business Machines Corporation(US NY Armonk)
發(fā)明人
John Stewart Best; Steven Robert Hetzler
IPC分類
G06F11/00; G06F11/10; G11B5/82; G11B7/24097; H03M13/15
技術(shù)領(lǐng)域
erasure,storage,strips,disk,optical,in,code,failure,stripe,disks
地域: NY NY Armonk

摘要

A computer-implemented method, according to one embodiment, includes: selecting strips from each storage unit for a given erasure code stripe such that the given erasure code stripe includes at most one strip from a high failure rate region of the respective storage unit, where each of the storage units include high and low failure rate regions. The selected strips are organized such that a number of each strip in the given erasure code stripe is offset from the remaining strips by an amount that is greater than a total number of strips in the high failure rate regions. The organized selected strips are further mapped to form the given erasure code stripe such that the high failure rate regions on each storage unit are mapped to one or more sequentially numbered strips, and the low failure rate regions are mapped to additional sequentially numbered strips.

說明書

Now referring to FIG. 3, a storage system 300 is shown according to one embodiment. Note that some of the elements shown in FIG. 3 may be implemented as hardware and/or software, according to various embodiments. The storage system 300 may include a storage system manager 312 for communicating with a plurality of media and/or drives on at least one higher storage tier 302 and at least one lower storage tier 306. The higher storage tier(s) 302 preferably may include one or more random access and/or direct access media 304, such as optical media in optical disks, hard disks in HDDs, nonvolatile memory (NVM), solid state memory in SSDs, Flash memory, SSD arrays, Flash memory arrays, Flash-based SSDs, etc., and/or others noted herein or known in the art. The lower storage tier(s) 306 may preferably include one or more lower performing storage media 308, including sequential access media such as magnetic tape in tape drives and/or optical media, slower accessing HDDs, slower accessing SSDs, etc., and/or others noted herein or known in the art. One or more additional storage tiers 316 may include any combination of storage memory media as desired by a designer of the system 300. Also, any of the higher storage tiers 302 and/or the lower storage tiers 306 may include some combination of storage devices and/or storage media.

權(quán)利要求

1
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