Case Report: Failed to mount srt wim file

Problem

I found strange issue  in which SRT creation on Windows BMR Boot Server fails with "Failed to mount srt wim file" message.

This always happens when client software on the boot server have been installed by remote host(remote installation), but this does not happen on locally installed client hosts. I can reproduce this issue with NetBackup 7.5(7.5.0.5) on multiple Windows Server 2008 R2 clients in multiple NetBackup domains, so I'm certain that the key of this issue is remote installation.

After few hour investication, I found difference in regstry on remotely installed hosts. Setup of both method seems like different from each other.

Registry values on locally-installed clients(using reg command)

C:\>reg query HKLM\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_WIMFLTR /S

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_WIMFLTR
    NextInstance    REG_DWORD    0x1

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_WIMFLTR\0000
    Service    REG_SZ    WimFltr
    Legacy    REG_DWORD    0x1
    ConfigFlags    REG_DWORD    0x0
    Class    REG_SZ    LegacyDriver
    ClassGUID    REG_SZ    {8ECC055D-047F-11D1-A537-0000F8753ED1}
    DeviceDesc    REG_SZ    WimFltr

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_WIMFLTR\0000\Contro
l
    *NewlyCreated*    REG_DWORD    0x0
    ActiveService    REG_SZ    WimFltr
C:\>

Registry values on remotely-installed clients(using reg command)

C:\>reg query HKLM\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_WIMFLTR /S
ERROR: The system was unable to find the specified registry key or value.

C:\>

Workaround

If you get same error on remotely-installed clients, try to uninstall client software and re-install locally.