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Quoc Le, Ahmed Amer, JoAnne Holliday. RAID 4SMR: RAID Array with Shingled Magnetic Recording Disk for Mass Storage Systems[J]. Journal of Computer Science and Technology, 2019, 34(4): 854-868. DOI: 10.1007/s11390-019-1946-4
Citation: Quoc Le, Ahmed Amer, JoAnne Holliday. RAID 4SMR: RAID Array with Shingled Magnetic Recording Disk for Mass Storage Systems[J]. Journal of Computer Science and Technology, 2019, 34(4): 854-868. DOI: 10.1007/s11390-019-1946-4

RAID 4SMR: RAID Array with Shingled Magnetic Recording Disk for Mass Storage Systems

  • One way to increase storage density is using a shingled magnetic recording (SMR) disk. We propose a novel use of SMR disks with RAID (redundant array of independent disks) arrays, specifically building upon and compared with a basic RAID 4 arrangement. The proposed scheme (called RAID 4SMR) has the potential to improve the performance of a traditional RAID 4 array with SMR disks. Our evaluation shows that compared with the standard RAID 4, when using update in-place in RAID arrays, RAID 4SMR with garbage collection not just can allow the adoption of SMR disks with a reduced performance penalty, but offers a performance improvement of up to 56%.
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