我们使用 Veritas Backup Exec 16.0 来运行服务器备份。我们从 Backup Exec 2010 升级，从那时起就一直在解决问题，试图让计划顺利进行。Veritas 支持通常毫无用处，但解决了一些问题。持续存在的问题之一是某些服务器上的备份失败。
我们创建了一个名为 Active Directory 服务帐户备份执行程序并将其设置为运行备份的唯一 Backup Exec“系统登录帐户”。此帐户属于 AD“域管理员”和“备份操作员”组。
我们有两个电子邮件服务器；我们称它们为邮件1和邮件2。MAIL1 是主电子邮件服务器，MAIL2 用于电子邮件存档。两台服务器上都有我们要备份的目录。所有存档都为备份执行程序帐户，但我们也尝试使用完全控制集。Backup
Exec 中的作业失败，并出现以下错误：“未找到目录或文件，或无法访问。“我已检查两台服务器，目录确实存在，并且可以由备份执行程序帐户。
考虑到我们在使用该软件时遇到的所有其他问题，我曾认为这可能是 Backup Exec 的问题，但此后我运行了相同目录的 Windows Server Backup。两者都失败了，并出现“备份未能完成 - 设备尚未准备好“错误。我怀疑这可能与卷影复制服务问题有关，但不知道为什么会失败。
检查事件查看器（应用程序和服务日志 > Microsoft > Windows > 备份 > 操作）显示 ID 为 5 的错误事件”于“2018-05-15T13:06:43.666836500Z”启动的备份操作失败，错误代码为“2155348238”。请查看事件详细信息以找到解决方案，然后在问题解决后重新运行备份操作。“在网上搜索此错误代码没有发现太多信息，所以我在这里发帖，看看是否有人遇到过类似情况或可以提供任何建议。
检查 VSS 编写器和提供商没有发现任何问题：
邮件1
Microsoft Windows [Version 6.1.7601]
Copyright (c) 2009 Microsoft Corporation. All rights reserved.
C:\Users\*****>vssadmin list providers
vssadmin 1.1 - Volume Shadow Copy Service administrative command-line tool
(C) Copyright 2001-2005 Microsoft Corp.
Provider name: 'Microsoft Software Shadow Copy provider 1.0'
Provider type: System
Provider Id: {b5946137-7b9f-4925-af80-51abd60b20d5}
Version: 1.0.0.7
Provider name: 'Acronis VSS SW Provider'
Provider type: Software
Provider Id: {f782463b-33bb-4043-ad8d-60b728d26a6c}
Version: 1.0
C:\Users\*****>vssadmin list writers
vssadmin 1.1 - Volume Shadow Copy Service administrative command-line tool
(C) Copyright 2001-2005 Microsoft Corp.
Writer name: 'Task Scheduler Writer'
Writer Id: {d61d61c8-d73a-4eee-8cdd-f6f9786b7124}
Writer Instance Id: {1bddd48e-5052-49db-9b07-b96f96727e6b}
State: [1] Stable
Last error: No error
Writer name: 'VSS Metadata Store Writer'
Writer Id: {75dfb225-e2e4-4d39-9ac9-ffaff65ddf06}
Writer Instance Id: {088e7a7d-09a8-4cc6-a609-ad90e75ddc93}
State: [1] Stable
Last error: No error
Writer name: 'Performance Counters Writer'
Writer Id: {0bada1de-01a9-4625-8278-69e735f39dd2}
Writer Instance Id: {f0086dda-9efc-47c5-8eb6-a944c3d09381}
State: [1] Stable
Last error: No error
Writer name: 'System Writer'
Writer Id: {e8132975-6f93-4464-a53e-1050253ae220}
Writer Instance Id: {38a136f6-947f-4cc1-858d-7da11af035b1}
State: [1] Stable
Last error: No error
Writer name: 'ASR Writer'
Writer Id: {be000cbe-11fe-4426-9c58-531aa6355fc4}
Writer Instance Id: {775938d0-040d-439e-b23c-470caa2f4c84}
State: [1] Stable
Last error: No error
Writer name: 'Registry Writer'
Writer Id: {afbab4a2-367d-4d15-a586-71dbb18f8485}
Writer Instance Id: {8dd82e55-494f-4a0a-85d0-feda8087da0e}
State: [1] Stable
Last error: No error
Writer name: 'Shadow Copy Optimization Writer'
Writer Id: {4dc3bdd4-ab48-4d07-adb0-3bee2926fd7f}
Writer Instance Id: {062648bc-5c63-4480-95c7-060c7ffa81ff}
State: [1] Stable
Last error: No error
Writer name: 'COM+ REGDB Writer'
Writer Id: {542da469-d3e1-473c-9f4f-7847f01fc64f}
Writer Instance Id: {7f98ce15-383e-45d0-8882-e40ae9d573a9}
State: [1] Stable
Last error: No error
Writer name: 'BITS Writer'
Writer Id: {4969d978-be47-48b0-b100-f328f07ac1e0}
Writer Instance Id: {546b3f33-5754-45e8-aa35-199fb87e5239}
State: [1] Stable
Last error: No error
Writer name: 'WMI Writer'
Writer Id: {a6ad56c2-b509-4e6c-bb19-49d8f43532f0}
Writer Instance Id: {e282e3a3-cc1e-4848-831c-fc90bb230a6a}
State: [1] Stable
Last error: No error
邮件2
Microsoft Windows [Version 6.1.7601]
Copyright (c) 2009 Microsoft Corporation. All rights reserved.
C:\Users\*****>vssadmin list writers
vssadmin 1.1 - Volume Shadow Copy Service administrative command-line tool
(C) Copyright 2001-2005 Microsoft Corp.
Writer name: 'Task Scheduler Writer'
Writer Id: {d61d61c8-d73a-4eee-8cdd-f6f9786b7124}
Writer Instance Id: {1bddd48e-5052-49db-9b07-b96f96727e6b}
State: [1] Stable
Last error: No error
Writer name: 'VSS Metadata Store Writer'
Writer Id: {75dfb225-e2e4-4d39-9ac9-ffaff65ddf06}
Writer Instance Id: {088e7a7d-09a8-4cc6-a609-ad90e75ddc93}
State: [1] Stable
Last error: No error
Writer name: 'Performance Counters Writer'
Writer Id: {0bada1de-01a9-4625-8278-69e735f39dd2}
Writer Instance Id: {f0086dda-9efc-47c5-8eb6-a944c3d09381}
State: [1] Stable
Last error: No error
Writer name: 'ASR Writer'
Writer Id: {be000cbe-11fe-4426-9c58-531aa6355fc4}
Writer Instance Id: {53545b61-ebbb-46b9-8e4d-0bf0e3b542f6}
State: [1] Stable
Last error: No error
Writer name: 'WMI Writer'
Writer Id: {a6ad56c2-b509-4e6c-bb19-49d8f43532f0}
Writer Instance Id: {24a63d31-b3e2-42a9-9406-8ee5199d5155}
State: [1] Stable
Last error: No error
Writer name: 'System Writer'
Writer Id: {e8132975-6f93-4464-a53e-1050253ae220}
Writer Instance Id: {a39861ce-cd1f-48f3-a5f7-1f64030e6c49}
State: [1] Stable
Last error: No error
Writer name: 'Shadow Copy Optimization Writer'
Writer Id: {4dc3bdd4-ab48-4d07-adb0-3bee2926fd7f}
Writer Instance Id: {2860109e-f5e6-483c-b3be-74610f7d33f2}
State: [1] Stable
Last error: No error
Writer name: 'COM+ REGDB Writer'
Writer Id: {542da469-d3e1-473c-9f4f-7847f01fc64f}
Writer Instance Id: {2335da7a-8a8d-4cc1-b9fb-5330228379cb}
State: [1] Stable
Last error: No error
Writer name: 'Registry Writer'
Writer Id: {afbab4a2-367d-4d15-a586-71dbb18f8485}
Writer Instance Id: {54bb9048-bb0e-4fca-bd13-c336add2d72a}
State: [1] Stable
Last error: No error
C:\Users\*****>vssadmin list providers
vssadmin 1.1 - Volume Shadow Copy Service administrative command-line tool
(C) Copyright 2001-2005 Microsoft Corp.
Provider name: 'Microsoft Software Shadow Copy provider 1.0'
Provider type: System
Provider Id: {b5946137-7b9f-4925-af80-51abd60b20d5}
Version: 1.0.0.7
Provider name: 'Acronis VSS SW Provider'
Provider type: Software
Provider Id: {f782463b-33bb-4043-ad8d-60b728d26a6c}
Version: 1.0
我不确定还有什么可能阻止访问。
我目前正在使用我的管理员帐户（也是域管理员的成员）而不是备份执行程序帐户，看看这是否有任何不同。结果出来后我会发布。
提前致谢。