注：在以下命令说明中， <x> 用于指示必须进行替换的地方。在 RHEL 系统 上， <x> 为分配给设备的编号。在 SLES 系统上， <x> 为分配给设备的字母。

扫描新增的虚拟磁盘

rescan_dm_devs 命令扫描主机服务器系统，查找映射至主机服务器的现有 和新增的虚拟磁盘。

# rescan_dm_devs

如果有阵列虚拟磁盘 (VD) 稍后映射到主机服务器，则必须再次运行 rescan_dm_devices 命令，让 VD 成为操作系统的可见 LUN。

使用多路径命令显示多路径设备拓扑

多路径命令会将新扫描到的虚拟磁盘和映射的虚拟磁盘添加至 Device Mapper 表，然后在主机服务器的 /dev/mapper 目录中为其创建条目。这 些设备与主机中的其他所有块设备相同。

要列出所有多路径设备，请运行以下命令：

# multipath – ll

输出必须与此显示一个映射的虚拟磁盘的输出示例相似。

mpath1 (3600a0b80005ab177000017544a8d6b92) dm-0 DELL, MD36xxf

[size=5.0G][features=3 queue_if_no_path pg_init_retries 50][hwhandler=1 rdac][rw]

\_ round-robin 0 [prio=6][active]

\_ 5:0:0:0 sdc 8:32 [active][ready]

\_ round-robin 0 [prio=0][enabled]

\_ 4:0:0:0 sdb 8:16 [active][ghost]

其中

mpath1 是由 Device Mapper 创建的虚拟设备的名称。它位于 /dev/mapper 目录中。

DELL 是设备供应商

MD36xxf 是设备型号

Sdc 是设备的所属控制器的物理路径

Sdb 是设备的非所属控制器的物理路径

配置：Linux 的Device Mapper 多路径

189

Page 188 Page 190
Page 189
Image 189
Dell MD3620F, MD3600f manual 扫描新增的虚拟磁盘 Rescandmdevs 命令扫描主机服务器系统，查找映射至主机服务器的现有 和新增的虚拟磁盘。, 输出必须与此显示一个映射的虚拟磁盘的输出示例相似。
Page 188 Page 190

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.
Top Page Image Contents