Free Practice Questions for Cohesity COH-285 Exam

The correct command is vxlogview -o 118 -d D,T,x. Status code 96 commonly indicates that NetBackup could not allocate required media or storage resources, so troubleshooting should focus on the NetBackup Resource Broker, also known as nbrb. Cohesity NetBackup documentation identifies originator ID 118 as nbrb, the NetBackup Resource Broker, which maintains available resource information and locates the physical and logical resources needed for backup and tape restore operations. The vxlogview command is the supported utility for reading unified logs, because unified log files are binary and must be assembled by vxlogview. The -o 118 option filters log records for the Resource Broker originator, while -d D,T,x displays the required fields: date, timestamp, and actual log message text. The command reference defines D as display date, T as display timestamp, and x as display actual log message text. Option C is incorrect because w displays who logged diagnostic/debug messages, not the actual message text. References/topics: NetBackup unified logging, vxlogview, originator IDs, nbrb Resource Broker logging, and status 96 resource allocation troubleshooting.

The method that is not able to provide historical performance information is running nbperfchk on the command line. nbperfchk is a standalone diagnostic utility used to test current disk I/O and network transfer rates. Official NetBackup guidance describes it as a tool used to determine base disk performance for backup disk devices and network throughput to a disk volume; it generates performance results from the test being run, not from prior NetBackup jobs or stored catalog/reporting data. By contrast, the other options are valid historical performance sources. The Activity Monitor job details provide job-level performance fields such as Start Time/End Time, Elapsed Time, KB per Second, and Kilobytes. The All Log Entries report can be run for a selected Date/Time Range and displays transfer-rate information useful for evaluating backup performance and predicting future backup windows. OpsCenter Disk and Tape Device Activity reports provide storage-device activity, utilization, throughput, and capacity-related reporting across NetBackup storage resources. Therefore, nbperfchk is a point-in-time benchmarking tool, not a historical reporting mechanism. References/topics: NetBackup performance evaluation, Activity Monitor job details, All Log Entries report, OpsCenter Disk and Tape Device Activity reports, and nbperfchk performance testing.

The unavailable feature is Spanning volumes. In NetBackup cloud storage, disk-volume spanning is not supported by cloud vendors for backup images. The official NetBackup Cloud Administrator’s Guide lists cloud-storage limitations and explicitly states that cloud vendors do not support disk volume spanning of backup images. This makes option C the only correct answer. The other options are valid cloud-storage configuration capabilities. Compression is available in the Cloud Storage Server Configuration Wizard; the wizard provides a setting to compress backup data before writing to cloud storage. Encryption is also a supported wizard function, including AES-256 encryption and KMS-related configuration for data written to cloud storage. Secure Sockets Layer is likewise a supported connection property: NetBackup cloud storage server properties include USE_SSL and USE_SSL_RW, with SSL enabled by default for control APIs and read/write operations. Therefore, because encryption, SSL, and compression are configurable cloud features, while disk-volume spanning is a documented cloud-storage limitation, the correct selection is C. Spanning volumes. Reference topics: NetBackup Cloud Administrator’s Guide, “Configuring cloud storage,” “Cloud storage server connection properties,” and “Support limitations for NetBackup cloud storage.”