Avamar：Hyper-V 備份失敗，並顯示「無法擷取所有目標的 vss 備份檔案」。
Summary: 本知識庫 （KB） 文章提供有關由於卷影複製服務 （VSS） 編寫器導致 Hyper-V 備份失敗的解決方案。
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Symptoms
Avamar Hyper-V 備份可能會失敗，並出現類似以下錯誤：
avhypervvss Error <41606>: Failed to fetch vss backup files for all the targets. Internal error.
avhypervvss Error <41586>: Failed to backup targets. Unable to assign vss reported backup files for all targets
avhypervvss Error <41662>: Failed to validate and expand the targets.
avhypervvss Error <41659>: Backup did not complete successfullyCause
Hyper-V VSS 撰寫器可能處於故障狀態。您可以開啟 Windows 命令或 PowerShell 提示字元並執行此動作來確認 vssadmin list writers （無引號）：
Writer name: 'Microsoft Hyper-V VSS Writer'
Writer Id: {66841cd4-6ded-4f4b-8f17-fd23f8ddc3de}
Writer Instance Id: {5713fd6b-5154-4a3b-a6ef-4973bfea66c9}
State: [1] Failed
Last error: No error
Resolution
開啟 services.msc 主控台，然後在 Hyper-V 主機上重新啟動 Hyper-V 虛擬機管理服務。
從 Windows 命令或 PowerShell 提示字元執行下列命令，確認 Hyper-V VSS 寫入器處於良好或穩定的狀態：
vssadmin list writers
Affected Products
Avamar, Avamar Plug-in for Hyper-V VSS, Integrated Data Protection Appliance FamilyArticle Properties
Article Number: 000039786
Article Type: Solution
Last Modified: 11 Dec 2025
Version: 5
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