Explanation:
Reference: https://www.delltechnologies.com/en-us/collaterals/unauth/white-papers/products/storage/h18149- dell-emc-powerstore-platform-introduction.pdf (12)

Explanation:
A Dell PowerStore protection policy contains two snapshot rules and one replication rule, and it applies to specific storage resources such as volumes and volume groups. These resources will run only the snapshot rules, not the replication rule. A snapshot rule allows you to create point-in-time copies of the data, which can be used to recover data in case of data loss or corruption. Snapshot rules are applied to specific volumes or volume groups, and only these resources will be backed up with the snapshot. A replication rule allows you to replicate data to a remote site for disaster recovery or data protection. Replication rules are applied to different resources such as Virtual Machines, File Servers, File Systems, etc. In this case, the snapshot rules will be applied to Volumes and Volume Groups, and the replication rule will be applied to other resources such as Virtual Machines, File Servers, File Systems.

Explanation:
The Dell Unity XT 380F has a default spare space allocation of 4% of the total number of drives in a dynamic pool. So with 90x 1.92 TB SSDs, 4 drives will be allocated as spare space. These spare drives are used to automatically replace a failed drive, ensuring data availability and protection.

Explanation:
Reference; https://www.delltechnologies.com/en-ba/collaterals/unauth/white-papers/products/storage/h15089- dell_emc_unity-snapshots_and_thin_clones.pdf (7)