The associated snapshot repository virtual disk must have sufficient capacity to process the rollback operation and the write operations from the host. At most, the snapshot repository virtual disk may need twice the size of the base disk, plus additional metadata space equaling approximately 1/1000th (that is, 0.1%) of the Base volume capacity.

NOTE: Due to host server write operations, the content in the snapshot virtual disk may have changed since creation of the snapshot. The rollback operation includes any changes made to the snapshot after it was created.

You can set priority for a rollback operation. Higher priority allocates more system resources for the rollback operation and affects overall system performance.

Rules and Guidelines for Performing a Snapshot Rollback

The following rules and guidelines apply to performing a snapshot rollback:

•Rolling back a base virtual disk to a snapshot virtual disk does not affect the contents of the snapshot virtual disks.

•Only one snapshot rollback operation can be performed at a time.

•While a base virtual disk that is undergoing a rollback, you cannot create a new snapshot virtual disks from that base virtual disk.

•A snapshot rollback cannot be started while any of these operations are underway:

–Virtual Disk Capacity Expansion

–Virtual Disk Expansion (VDE)

–RAID Level Migration

–Segment Size Migration

–Virtual Disk Copy

–Role Reversal (in remote replication)

•If the base virtual disk is a secondary virtual disk in a remote replication, you cannot perform a snapshot rollback.

•If any capacity used in the associated snapshot repository virtual disk contains unreadable sectors, the snapshot rollback fails.

Configuration: Premium Feature—Snapshot Virtual Disks

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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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