Shingled magnetic recording (SMR) is regarded as a promising technology for resolving the areal density limitation of conventional magnetic recording hard disk drives. Among different types of SMR drives, drive-managed SMR (DM-SMR) requires no changes on the host software and is widely used in today’s consumer market. DM-SMR employs a shingled translation layer (STL) to hide its inherent sequential-write constraint from the host software and emulate the SMR drive as a block device via maintaining logical to physical block address mapping entries. However, because most existing STL designs do not simultaneously consider the access pattern and the data update frequency of incoming workloads, those mapping entries maintained within the STL cannot be effectively managed, thus inducing unnecessary performance overhead. To resolve the inefficiency of existing STL designs, this article proposes a demand-based STL (DSTL) to simultaneously consider the access pattern and update frequency of incoming data streams to enhance the access performance of DM-SMR. The proposed design was evaluated by a series of experiments, and the results show that the proposed DSTL can outperform other SMR management approach by up to 86.69% in terms of read/write performance.

中文翻译：

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DSTL

叠瓦式磁记录（SMR）被认为是一种很有前途的技术，可以解决传统磁记录硬盘驱动器的面密度限制。在不同类型的 SMR 驱动器中，驱动器管理的 SMR (DM-SMR) 不需要对主机软件进行任何更改，并且广泛用于当今的消费市场。DM-SMR 采用叠瓦转换层 (STL) 向主机软件隐藏其固有的顺序写入约束，并通过维护逻辑到物理块地址的映射条目将 SMR 驱动器模拟为块设备。然而，由于大多数现有的 STL 设计没有同时考虑传入工作负载的访问模式和数据更新频率，因此无法有效管理 STL 中维护的那些映射条目，从而导致不必要的性能开销。为了解决现有STL设计效率低下的问题，本文提出了一种基于需求的STL（DSTL），同时考虑传入数据流的访问模式和更新频率，以提高DM-SMR的访问性能。通过一系列实验对所提出的设计进行了评估，结果表明，所提出的 DSTL 在读/写性能方面可以优于其他 SMR 管理方法高达 86.69%。