Free Practice Questions for Cohesity COH-285 Exam

( Storage unit groups in NetBackup enable load balancing and failover for backup jobs, by allowing you to define multiple storage units for a backup policy and specify the order in which they are used for backups.)

The correct action is to run content router queue processing on the media server that hosts the MSDP storage server. In an MSDP environment, expiring backup images with bpexpdate removes or marks the NetBackup catalog references, but the deduplicated segment references in MSDP are reclaimed through the deduplication transaction queue. Cohesity NetBackup documentation explains that after images are expired, MSDP may not immediately reclaim the freed space and that administrators can accelerate reclamation by manually processing the MSDP transaction queue. The deduplication process writes transaction log data into the queue directory, and that queue data is later processed during the next content router queue processing operation. Official NetBackup Deduplication procedures specify running crcontrol --processqueue on the MSDP storage server, not on the primary server. Image cleanup alone is not the MSDP space-reclamation mechanism after manual expiration, and a storage-pool inventory does not dereference deduplicated fragments. Therefore, the required step is option A.

The correct options are A and E. The warning indicates that the catalog disaster recovery file is being written to a location that would likely be lost with the NetBackup catalog during a disk or server failure. Cohesity NetBackup documentation for the NBU-Catalog policy’s Disaster Recovery tab states that the DR path is where disaster recovery information is saved, and explicitly recommends not saving that information to the local computer; instead, it should be saved to a network share or removable device. It also states that, on UNIX, the path cannot be on the same partition as /usr/openv/netbackup; it must be changed to a directory on a different partition. Therefore, placing the DR file on a volume other than the NetBackup volume resolves the warning. Cohesity also documents the Send disaster recovery email option, where one or more administrator email addresses can be entered so NetBackup sends DR information after every catalog backup. The disaster recovery email includes recovery instructions and the image file/package attachments needed for catalog recovery. References/topics: NBU-Catalog policy, Disaster Recovery tab, DR file path, and disaster recovery email configuration.

A Storage Unit is a logical NetBackup object used to represent the storage destination for backup data. The official Cohesity NetBackup documentation defines it directly: “A storage unit is a label that NetBackup associates with physical storage.” It further explains that the label can identify a robot, a path to a volume, or a disk pool. This makes option C the precise definition. Option A is incomplete because a storage unit does not merely define a physical location; it abstracts storage resources so policies and storage lifecycle operations can target them. Option B is incorrect because storage plans or lifecycle policies may use storage units, but a storage unit itself is not created for the sole purpose of creating a plan. Option D is too narrow because Media Manager is associated primarily with tape/robotic media handling, while storage units are broader NetBackup entities and can represent tape, disk, or disk-pool destinations. Cohesity NetBackup storage topics also describe storage units as part of the recognized storage configurations and note that they can be included in storage unit groups or storage lifecycle policies.