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Dell MD3620F, MD3600f owner manual Important Information About Special Partitions, 217

Models: MD3600f MD3620F

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Important Information About Special Partitions

When using Device Mapper with the MD3600f Series array, all physical disks are assigned a disk device node. This includes a special device type used for in-band management of the MD3600f Series array, known as the Access Disk or Universal Xport device.

CAUTION: Certain commands, such as lsscsi, displays one or more instances of Universal Xport devices. These device nodes must never be accessed, mounted, or used in any way. Doing so could cause loss of communication to the storage array and possibly cause serious damage to the storage array, potential making data stored on the array inaccessible.

Only multipathing device nodes and partition nodes created using the directions provided above should be mounted or in any way accessed by the host system or its users.

Table 14-1. Device Mapper Commands

Command

Descriptions

 

 

multipath -h

Prints usage information.

multipath -ll

Displays the current multipath topology using all

 

available information (sysfs, the device mapper,

 

path checkers, and so on).

multipath

Re-aggregates multipathing device with

 

simplified output.

multipath -f

Flushes out Device Mapper for the specified

<multipath_dev_node>

multipathing device. Used if the underlying

 

physical devices are deleted/unmapped.

multipath -F

Flushes out all unused multipathing device maps.

rescan_dm_devs

Dell provided script. Forces a rescan of the host's

 

SCSI bus and aggregates multipathing devices as

 

needed. For use when:

 

• LUNs are dynamically mapped to the hosts.

 

• New targets are added to the host.

 

• Failback of the storage array is required.

 

 

Configuration: Device Mapper Multipath for Linux

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Dell MD3620F, MD3600f owner manual Important Information About Special Partitions, 217, Device Mapper Commands Descriptions
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MD3600f, MD3620F 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.