Device Mapper Configuration Steps

To complete the DM multipathing configuration and make the storage available to the Linux host server:

1Scan for virtual disks. See "Scan for Newly Added Virtual Disks" on page 221.

2Display the multipath device topology. See "Display the Multipath Device Topology Using the Multipath Command" on page 222.

3Create a partition on a multipath device node. See "Create a New fdisk Partition on a Multipath Device Node" on page 223.

4Add a partition to DM. See "Add a New Partition to Device Mapper" on page 223.

5Create a file system on a DM partition. See "Create a File System on a Device Mapper Partition" on page 224.

6Mount a DM partition. See "Mount a Device Mapper Partition" on page 224.

NOTE: In the following command descriptions <x> is used to indicate where a substitution must be made. On RHEL systems <x> is the number assigned to the device. On SLES systems <x> is the letter(s) assigned to the device.

Scan for Newly Added Virtual Disks

The rescan_dm_devs command scans the host server system looking for existing and newly added virtual disks mapped to the host server.

# rescan_dm_devs

If an array virtual disk (VD) is mapped to the host server at a later time, the rescan_dm_devices command must be run again to make the VD a visible LUN to the operating system.

Configuration: Device Mapper Multipath for Linux

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Dell MD3620F, MD3600f owner manual Device Mapper Configuration Steps, Scan for Newly Added Virtual Disks, 221
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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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