A Case for Redundant Arrays of Hybrid Disks (RAHD)

F. Wang; N. Helian; S. Wu; Y.K. Guo; D. Deng; V. Khare; C. Liao; M. Rashidi; A. Parker

doi:10.1109/TMAG.2008.2002531

A Case for Redundant Arrays of Hybrid Disks (RAHD)

F. Wang, N. Helian, S. Wu, Y.K. Guo, D. Deng, V. Khare, C. Liao, M. Rashidi, A. Parker

Research output: Contribution to journal › Article › peer-review

149 Downloads (Pure)

Abstract

Hybrid Hard Disk Drive was originally concepted by Samsung, which incorporates a Flash memory in a magnetic disk. The combined ultra-high-density benefits of magnetic storage and the low-power and fast read access of NAND technology inspires us to construct Redundant Arrays of Hybrid Disks (RAHD) to offer a possible alternative to today’s Redundant Arrays of Independent Disks (RAIDs)
and/or Massive Arrays of Idle Disks (MAIDs). We first design an internal management system (including Energy-Efficient Control) for hybrid disks. Three traces collected from real systems as well as a synthetic trace are then used to evaluate the RAHD arrays. The trace-driven experimental results show: in the high speed mode, a RAHD outplays the purely-magnetic-disk-based RAIDs by a factor of 2.4–4; in the energy-efficient mode, a RAHD4/5 can save up to 89% of energy at little performance degradation

Original language	English
Pages (from-to)	3738-3741
Journal	IEEE Transactions on Magnetics
Volume	44
Issue number	11
DOIs	https://doi.org/10.1109/TMAG.2008.2002531
Publication status	Published - 2008

Keywords

flash memory

Access to Document

10.1109/TMAG.2008.2002531

903157.pdf
“This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder." “Copyright IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.”

Cite this

@article{f7f40a37281940068a476b12078b2ac8,

title = "A Case for Redundant Arrays of Hybrid Disks (RAHD)",

abstract = "Hybrid Hard Disk Drive was originally concepted by Samsung, which incorporates a Flash memory in a magnetic disk. The combined ultra-high-density benefits of magnetic storage and the low-power and fast read access of NAND technology inspires us to construct Redundant Arrays of Hybrid Disks (RAHD) to offer a possible alternative to today{\textquoteright}s Redundant Arrays of Independent Disks (RAIDs) and/or Massive Arrays of Idle Disks (MAIDs). We first design an internal management system (including Energy-Efficient Control) for hybrid disks. Three traces collected from real systems as well as a synthetic trace are then used to evaluate the RAHD arrays. The trace-driven experimental results show: in the high speed mode, a RAHD outplays the purely-magnetic-disk-based RAIDs by a factor of 2.4–4; in the energy-efficient mode, a RAHD4/5 can save up to 89% of energy at little performance degradation ",

keywords = "flash memory",

author = "F. Wang and N. Helian and S. Wu and Y.K. Guo and D. Deng and V. Khare and C. Liao and M. Rashidi and A. Parker",

year = "2008",

doi = "10.1109/TMAG.2008.2002531",

language = "English",

volume = "44",

pages = "3738--3741",

journal = "IEEE Transactions on Magnetics",

issn = "0018-9464",

publisher = "Institute of Electrical and Electronics Engineers (IEEE)",

number = "11",

}

TY - JOUR

T1 - A Case for Redundant Arrays of Hybrid Disks (RAHD)

AU - Wang, F.

AU - Helian, N.

AU - Wu, S.

AU - Guo, Y.K.

AU - Deng, D.

AU - Khare, V.

AU - Liao, C.

AU - Rashidi, M.

AU - Parker, A.

PY - 2008

Y1 - 2008

N2 - Hybrid Hard Disk Drive was originally concepted by Samsung, which incorporates a Flash memory in a magnetic disk. The combined ultra-high-density benefits of magnetic storage and the low-power and fast read access of NAND technology inspires us to construct Redundant Arrays of Hybrid Disks (RAHD) to offer a possible alternative to today’s Redundant Arrays of Independent Disks (RAIDs) and/or Massive Arrays of Idle Disks (MAIDs). We first design an internal management system (including Energy-Efficient Control) for hybrid disks. Three traces collected from real systems as well as a synthetic trace are then used to evaluate the RAHD arrays. The trace-driven experimental results show: in the high speed mode, a RAHD outplays the purely-magnetic-disk-based RAIDs by a factor of 2.4–4; in the energy-efficient mode, a RAHD4/5 can save up to 89% of energy at little performance degradation

AB - Hybrid Hard Disk Drive was originally concepted by Samsung, which incorporates a Flash memory in a magnetic disk. The combined ultra-high-density benefits of magnetic storage and the low-power and fast read access of NAND technology inspires us to construct Redundant Arrays of Hybrid Disks (RAHD) to offer a possible alternative to today’s Redundant Arrays of Independent Disks (RAIDs) and/or Massive Arrays of Idle Disks (MAIDs). We first design an internal management system (including Energy-Efficient Control) for hybrid disks. Three traces collected from real systems as well as a synthetic trace are then used to evaluate the RAHD arrays. The trace-driven experimental results show: in the high speed mode, a RAHD outplays the purely-magnetic-disk-based RAIDs by a factor of 2.4–4; in the energy-efficient mode, a RAHD4/5 can save up to 89% of energy at little performance degradation

KW - flash memory

UR - http://www.scopus.com/inward/record.url?scp=77955148179&partnerID=8YFLogxK

U2 - 10.1109/TMAG.2008.2002531

DO - 10.1109/TMAG.2008.2002531

M3 - Article

SN - 0018-9464

VL - 44

SP - 3738

EP - 3741

JO - IEEE Transactions on Magnetics

JF - IEEE Transactions on Magnetics

IS - 11

ER -

A Case for Redundant Arrays of Hybrid Disks (RAHD)

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this