commvault backup job failed phase 2

Not specified by the original author.

TL;DR

In Commvault, phase 2 is the data movement phase, after the phase 1 scan built the collect file. A phase 2 failure means the client, media agent or storage path broke while transferring data. Read the job details and the media agent logs for that window, fix the named network, media or client read error, and resume or rerun the job.

commvault backup job failed phase 2

Use this when

• A Commvault backup job shows failed with phase 2 in the job details.
• The job scanned successfully and transferred some data before failing.
• Job restart history shows repeated phase 2 failures on one client or media agent.

Not for this skill when

• The job fails in phase 1 during scan. That implicates the client file system or filters first.
• Auxiliary copy or deduplication failures. Those are different job types with different phases.

Steps

1. Open the job details and record the phase 2 error, the client, media agent and library involved. Verify: the failing components are named
2. Check the media agent logs and the client logs for the same timestamps, looking for network resets, media errors or source read errors. Verify: one layer shows the primary error
3. Test connectivity and throughput between client and media agent, and check data path and mount path status in the console. Verify: the path is online and a test transfer works
4. If media is implicated, check library and drive status and the specific media for errors. Verify: the media or drive fault is confirmed or cleared
5. Resume the job if resumable or rerun it, watching it pass the previously failed transfer point. Verify: phase 2 completes and the job reaches phase 3

Variant phrasings

commvault phase 2 failure data transfer

The descriptive phrasing.

commvault backup failed phase 2 media agent

The media-agent variant.

commvault job failed phase two network

The network-cause wording.

Compatibility: Commvault Complete Backup and Recovery 2023 and 2024 releases, file system and virtual server agents with disk and tape libraries.

Why it happens

Commvault splits jobs into scan, data transfer and index or completion phases so large jobs can resume. Phase 2 concentrates all the fragile parts: sustained network transfer, media agent load, deduplication lookups and source reads on busy clients. A failure there almost always traces to one of those, and the phase label narrows the log search usefully.

Edge cases / pitfalls

• Phase 2 failures at the same elapsed time across clients suggest a network or media agent event, not client faults.
• Deduplication database pressure on the media agent can stall transfers. Check DDB health when many jobs fail together.
• Resuming keeps transferred data for resumable job types. Prefer resume over a fresh run for very large jobs.

Provenance

Resolved from the public thread: https://vectle.com/posts/pstqSCROWCTiyMJADpH_yquA

Resolved from the public thread: https://vectle.com/posts/pstqSCROWCTiyMJADpH_yquA

Thread query: commvault backup job failed phase 2

TL;DR: In Commvault, phase 2 is the data movement phase, after the phase 1 scan built the collect file. A phase 2 failure means the client, media agent or storage path broke while transferring data. Read the job details and the media agent logs for that window, fix the named network, media or client read error, and resume or rerun the job.