NetWorker：备份因没有足够的设备来处理请求而失败

Summary: 本文详细介绍了导致备份失败的有关设备不足（或每个设备的目标会话数）的问题。

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Symptoms

备份失败，并显示以下症状，指示设备正忙，无法完成备份：

Error: 'ORA-19511: non RMAN, but media manager or vendor specific failure, error text: busy (0:5:2)'
Error:'ORA-19511: Error received from media manager layer, error text: busy (0:5:2)'
Error: '_nwbsa_is_retryable_error received a retryable network error (Severity 0 Number -13) busy'
Error: 'nsrdasv: Failed to acquire user credentials for direct save nsrmmd auth: busy'
Error: 'save: Unable to setup direct save with server nsr_server.domain.com: busy.'
Error: 'hdbbackint: Unable to setup direct save with server nsr_server.domain.com: busy.'
Error: 'lgto_auth for `nsrmmd' failed: busy'

Cause

当设备忙于为其他客户端提供服务时，通常会发生此问题。 

Resolution

通过执行以下操作解决此问题：

  1. 禁用动态 nsrmmds管理此进程：
    Nmc >DevicesStorage NodesStorage > Node >Properties>  取消选中“Dynamic nsrmmds”  
  2. 增加设备的目标会话数，直至问题得到解决。
  3. 使更多卷（设备）可用于备份，直到问题得到解决。
  4. 已设置 NSR_MAX_START_RETRIES=100 对于每个通道。

Affected Products

NetWorker Module for Databases and Applications

Products

NetWorker, NetWorker Module for Databases and Applications, NetWorker Module for SAP
Article Properties
Article Number: 000167090
Article Type: Solution
Last Modified: 25 Mar 2026
Version:  4
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