Hi all
SnapManager for SQL Server (SMSQL) uses the SnapInfo directory as the main repository to store all metadata related to the SMSQL instance installed on a host (such as SnapManager
backup metadata, stream-based backups of system databases, and transaction log backups)
SnapCenter uses a host log directory to store transaction log backup data. This is at the host and instance level. Each SQL Server host used by SnapCenter needs to have a host log directory configured to perform log backups.SnapCenter has a database repository, so metadata related to backup, restore, or cloning operations is stored in a central database repository
Backing up SQL Server system and user databases using SnapCenter requires that you choose the resource type, such as databases, SQL server instances, and Availability Groups (AG). Snapshot copy technology is leveraged to create online, read-only copies of the volumes on which the resources reside
hope thie helps