The communication between a primary and secondary virtual disks can be suspended or become unsynchronized. If communication between the primary virtual disk and the secondary virtual disk is disrupted:

1The status of the replicated pair changes to Unsynchronized.

2A Needs Attention status is displayed for the storage array.

3Data is written to the primary virtual disk.

4Write requests to the primary virtual disk are logged.

5The RAID controller module owner sends an I/O completion message to the host sending the write request. Although the host can continue to send write requests to the primary virtual disk, no data transfer takes place to the secondary virtual disk. Writes to the secondary virtual disk are suspended pending restoration of communications between the primary virtual disk and the secondary virtual disk.

When connectivity is restored between the primary virtual disk and the secondary virtual disk, the replicated pair is ready to be resynchronized.

NOTE: When the primary virtual disk and the secondary virtual disk are resynchronized, only data that has changed on the primary virtual disk after the break in communication is transferred to the secondary virtual disk.

CAUTION: You should be aware of a possible loss of data if communication is broken after resynchronization starts between the primary storage array and the secondary storage array. New data might mix with old data on the secondary virtual disk and render the data unusable in a disaster recovery situation.

Changing Synchronization Priority and Method

Synchronization priority defines how much processing time and resources are allocated to synchronizing the primary and secondary virtual disk of a remote replication relative to system performance. Increasing the synchronization priority of a remote replication might degrade system performance. Synchronization priorities can be reset at any time.

Synchronization priorities can affect these operations:

•Performing a copyback

•Performing a Virtual Disk Expansion (VDE)

•Reconstructing a virtual disk

•Initializing a virtual disk

Configuration: Premium Feature— Remote Replication

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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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