RAID 级别

RAID 级别决定数据写入物理磁盘的方式。不同的 RAID 级别提供不同的可 访问性、冗余和 容量级别。

与使用单个物理磁盘相比，使用多个物理磁盘有以下优势：

•将数据置于多个物理磁盘 （条带）上可让输入 / 输出 (I/O) 操作同时发 生，并且改善性能。

•如果发生错误，则使用镜像或奇偶校验在多个物理磁盘上存储冗余数 据以支持重建丢失的数据，即使错误是由物理磁盘的故障引起的。

每个 RAID 级别提供不同的性能和保护。必须根据应用程序类型、访问权 限、容错能力和要存储的数据来选择 RAID 级别。

存储阵列支持 RAID 级别 0、1、5、6 和 10。磁盘组中可使用的最大物理 磁盘数目取决于 RAID 级别：

•192 （对于 RAID 级别 0、 1 和 10）

•30 （对于 RAID 级别 5 和 6）。

RAID 级别的用法

为确保最佳性能，必须在创建系统物理磁盘时选择最佳 RAID 级别。磁盘 阵列的最佳 RAID 级别取决于：

•磁盘阵列中的物理磁盘的数目

•磁盘阵列中的物理磁盘的容量

•数据冗余访问的需要 （容错能力）

•磁盘性能要求

RAID 0

RAID 0 通过磁盘分割来实现高数据吞吐量，尤其适用于要求没有数据冗 余环境下的大文件。 RAID 0 将数据划分为各个数据段，并将每个数据段 写入单独的物理磁盘。这样可通过将 I/O 负载分散到多个物理磁盘上来大 幅提高 I/O 性能。尽管在所有 RAID 级别中 RAID 0 可提供最佳的性能， 但是它缺少数据冗余。仅对非关键数据选用此项，因为一个物理磁盘的故 障会导致所有数据的丢失。 RAID 0 应用程序的示例包括视频编辑、图像 编辑、印前应用程序或任何需要高带宽的应用程序。

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规划：MD3600f 系列存储阵列术语和概念

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Dell MD3600f, MD3620F manual Raid 级别, 192 （对于 RAID 级别 0、 1 和 10） 30 （对于 RAID 级别 5 和 6）。
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MD3620F, MD3600f specifications

Dell's MD3620F and MD3600F storage arrays are designed for businesses seeking dependable, high-performance storage solutions tailored to meet the demands of modern data management. These models offer a blend of scalability, efficiency, and advanced features, making them well-suited for a range of applications, from virtual environments to critical database operations.

One of the primary features of the MD3620F and MD3600F is their support for a hybrid storage architecture. This approach allows organizations to combine flash storage with traditional hard disk drives (HDDs) to optimize performance and cost. The MD3620F focuses heavily on all-flash configurations, delivering exceptional speed and lower latency, ideal for I/O-intensive workloads.

Scalability is another hallmark of these storage solutions. The MD3600F allows users to scale up to 120 drives, providing robust capacity to meet growing data needs. The MD3620F is engineered for environments where data availability and speed are paramount, with support for high IOPS (Input/Output Operations Per Second) and consistent performance under stress.

In terms of data management, both systems integrate with Dell’s proprietary software, which enhances operational efficiency through features like automated tiering. This technology optimizes data placement between different storage types based on access frequency, ensuring that hot data is readily available while reducing costs associated with less critical data.

Reliability is crucial for businesses that depend on their storage systems. The MD3620F and MD3600F come equipped with advanced data protection mechanisms, such as RAID support, which safeguards against data loss, and snapshot capabilities that provide point-in-time copies of data. Moreover, these solutions include hot-swappable components, ensuring minimal downtime for maintenance and repairs.

Connectivity is also a strong suit of these storage arrays. They support multiple connectivity options, including SAS and iSCSI, allowing for flexible integration into existing IT infrastructures. This adaptability enhances their appeal to a wide range of enterprise environments.

In summary, the Dell MD3620F and MD3600F stand out as robust storage solutions with a combination of hybrid and all-flash configurations, scalability, advanced data management tools, and enhanced reliability features. These characteristics make them ideal for organizations looking to enhance their data storage capabilities while maintaining high performance and efficiency.
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