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= SVC = The IBM SAN Volume Controller (SVC) is a block-storage virtualization appliance, consisting of software and hardware. There are two versions, with the full enterprise version supporting up to eight nodes in a cluster. The IBM Virtual Storage Center (VSC) is the SVC with IBM Spectrum Protect Snapshot (FlashCopy Manager) and Spectrum Control (Tivoli Storage Productivity Center) sold as a bundled offering. The SVC software is named IBM Spectrum Virtualize and offered as the foundation of other products and for the public cloud. IBM’s SVC is based on standard Intel-based servers. The hardware nodes are rack-mountable systems with a custom front bezel, display, and a custom interconnect between the controller pair for high availability. The SVC software consists of custom code running on a Linux operating system. The software performs target mode emulation for the attached servers and maps the logical unit numbers (LUNs) in blocks to the physical LUNs. Input / output (I/O) is done to the attached storage as an initiator from the SVC. Functions like point-in-time copy (FlashCopy), remote replication (Global Mirror and Metro Mirror), and active-active stretched clusters (HyperSwap) represent additional advanced features that are optionally available. The virtualization of external storage systems from a variety of vendors is the primary function. The IBM SVC includes data reduction with compaction, deduplication, and compression of primary data, now included without an additional license charge. Data is deduplicated, compressed, and packed into allocation blocks as it is received in the SVC controllers and stored in a compressed form on the external systems. Data can be encrypted at the volume level for both internal (solid-state drives (SSDs)) and external storage. {{{ BM SAN卷控制器（SVC）是一種塊存儲虛擬化設備，由軟件和硬件組成。有兩個版本，完整的企業版最多支持一個集群中的八個節點。 IBM虛擬存儲中心（VSC）是帶有捆綁銷售的IBM Spectrum Protect Snapshot（FlashCopy Manager）和Spectrum Control（Tivoli Storage Productivity Center）的SVC。該SVC軟件名為IBM Spectrum Virtualize，並作為其他產品和公共雲的基礎提供。 IBM的SVC基於基於Intel的標準服務器。硬件節點是可機架安裝的系統，具有自定義的前擋板，顯示器和控制器對之間的自定義互連，以實現高可用性。 SVC軟件由運行在Linux操作系統上的自定義代碼組成。該軟件對連接的服務器執行目標模式仿真，並將塊中的邏輯單元號（LUN）映射到物理LUN。輸入/輸出（I / O）作為SVC的啟動器完成到附加存儲的操作。時間點複製（FlashCopy），遠程複製（全局鏡像和城域鏡像）以及主動-主動拉伸群集（HyperSwap）之類的功能代表了可選的其他高級功能。來自各種供應商的外部存儲系統的虛擬化是主要功能。 IBM SVC包括通過壓縮，重複數據刪除和主數據壓縮實現的數據壓縮，現在無需額外的許可費用即可包含在內。當數據在SVC控制器中接收並以壓縮形式存儲在外部系統上時，將對數據進行重複數據消除，壓縮並打包到分配塊中。可以在內部（固態驅動器（SSD））和外部存儲的捲級別對數據進行加密。 }}] |
DSA report
https://www.ibm.com/support/home/docdisplay?lndocid=SERV-DSA
SVC
The IBM SAN Volume Controller (SVC) is a block-storage virtualization appliance, consisting of software and hardware. There are two versions, with the full enterprise version supporting up to eight nodes in a cluster. The IBM Virtual Storage Center (VSC) is the SVC with IBM Spectrum Protect Snapshot (FlashCopy Manager) and Spectrum Control (Tivoli Storage Productivity Center) sold as a bundled offering. The SVC software is named IBM Spectrum Virtualize and offered as the foundation of other products and for the public cloud.
IBM’s SVC is based on standard Intel-based servers. The hardware nodes are rack-mountable systems with a custom front bezel, display, and a custom interconnect between the controller pair for high availability. The SVC software consists of custom code running on a Linux operating system. The software performs target mode emulation for the attached servers and maps the logical unit numbers (LUNs) in blocks to the physical LUNs. Input / output (I/O) is done to the attached storage as an initiator from the SVC. Functions like point-in-time copy (FlashCopy), remote replication (Global Mirror and Metro Mirror), and active-active stretched clusters (HyperSwap) represent additional advanced features that are optionally available. The virtualization of external storage systems from a variety of vendors is the primary function. The IBM SVC includes data reduction with compaction, deduplication, and compression of primary data, now included without an additional license charge. Data is deduplicated, compressed, and packed into allocation blocks as it is received in the SVC controllers and stored in a compressed form on the external systems. Data can be encrypted at the volume level for both internal (solid-state drives (SSDs)) and external storage.