sharepoint2013 Restore-SPSite 报错，采用数据库还原

PS C:Usersspadmin> Restore-SPSite http://hz0xw002049:8099 -Path D:20170731MossSiteSP.bak -Force -DatabaseServer hz0xw002049 -DatabaseName WSS_Content2017

确认
是否确实要执行此操作?
正在目标“http://hz0xw002049:8099”上执行操作“Restore-SPSite”。
[Y] 是(Y)  [A] 全是(A)  [N] 否(N)  [L] 全否(L)  [S] 挂起(S)  [?] 帮助
(默认值为“Y”):a
Restore-SPSite : <nativehr>0x80070003</nativehr><nativestack></nativestack>
所在位置 行:1 字符: 1
+ Restore-SPSite http://hz0xw002049:8099 -Path D:20170731MossSiteSP.bak -Force
 -D ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
~~~
    + CategoryInfo          : InvalidData: (Microsoft.Share...dletRestoreSite:
   SPCmdletRestoreSite) [Restore-SPSite]，DirectoryNotFoundException
    + FullyQualifiedErrorId : Microsoft.SharePoint.PowerShell.SPCmdletRestoreS
   ite

PS C:Usersspadmin> Mount-SPContentDatabase –Name "WSS_Content_80"  –WebApplication "http://hz0xw002049:8099"


Id               : 0d9c4d5f-54c4-4e3f-bd98-27c094e763cc
Name             : WSS_Content_80
WebApplication   : SPWebApplication Name=SharePoint - 8099
Server           : HZ0XW002049
CurrentSiteCount : 1