The online upgrade method is a highly reliable and highly available upgrade method carried out under the condition that the business is not interrupted, and is used for the occasion where the business cannot be interrupted by the upgrade. Since online upgrades are performed in batches, the impact on business performance is small.

A company has an existing set of third-party storage devices and plans to migrate data. The target storage is Huawei all-flash storage. During the migration, it is found that the third-party storage is accidentally powered off, causing service interruption. At this time, data migration rollback is performed to restore the service.

The effective capacity of the storage device is less than the actual disk capacity. Discrepancies may be caused by hot spare space, coffer disks, RAID parity data or metadata.

An enterprise needs to back up SQL Server database applications and operating system applications. The business data is mainly produced at 9:00-18:00. The backup system is required to be stable and reliable, and the data reliability is high.
Which of the following options matches the background information analysis of this scene?
(Multiple Choice)

An engineer needs to perform a snapshot rollback operation to obtain the source data at a certain point in the past. Which of the following statements is correct about this operation process?
(Multiple Choice)