A File-Oriented Fast Secure Deletion Strategy for Shingled Magnetic Recording Drives

Shuo Han Chen*, Chun Feng Wu, Ming Chang Yang, Yuan Hao Chang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Nowadays, securely erasing deleted files has become one of the necessary tasks for users who want to protect their deleted data from malicious attackers. Nevertheless, existing secure deletion approaches are considered inefficient for erasing deleted files permanently because the file systems and storage devices do not share their file information or data layout with each other. On the emerging shingled magnetic recording (SMR) drives, the inefficiency of existing secure deletion approaches is exaggerated by the inherent sequential-write constraint of the high storage density SMR technology. On SMR drives, tracks are overlapped via utilizing the size difference between disk read/write heads to increase the storage density. Due to the overlapped track layout, secure deletion requests may induce a significant amount of write amplification and serious performance degradation if the data layout is not properly configured. Such observation motivates this article to come up with a file-oriented fast secure deletion (FFSD) strategy to deal with the sequential-write constraint of SMR drives and improve the efficiency of secure deletion operations on SMR drives. The experimental results show that the proposed strategy can effectively reduce the secure deletion latency by 286.15 × on average when compared with the conventional approach.

Original languageEnglish
Pages (from-to)2463-2476
Number of pages14
JournalIEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems
Volume41
Issue number8
DOIs
StatePublished - 1 Aug 2022

Keywords

  • File oriented
  • secure deletion
  • shingled magnetic recording (SMR)

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