Missing Site Templates while migrating to SharePoint 2013

Issue:The following sites are using templates that are not yet supported after upgrade

Eg:

 http://servername/samples/<sitename> - #0

 http://servername/samples/<sitename> - #1

 http://servername/samples/<sitename> - #2

 http://servername/samples/<sitename> - #3

Solution:

For this we need to check the site templates in both 14 and 15 hive folder.

We need to copy the missing site templates from 14 hive to 15 hive and also we must copy the site template related xml files (in 1033 folder )from 14 hive to 15 hive.

Power shell commands

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1) Convert the web application from classic to Claims
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Convert-SPWebApplication -Identity http://site url -From Legacy -To Claims -

RetainPermissions

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2)To get the Site collection administrators list in web application
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$web = Get-SPWeb http://site url
$web.SiteAdministrato

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3)Test the site before to start the  migration
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Test-SPContentDatabase -Name "database name" -WebApplication "site url"

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4)Mount the data base
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Mount-SPContentDatabase -Name "database name" -WebApplication "site url"

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5)DisMount the data base
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Dismount-SPContentDatabase -Name "database name" -WebApplication "site url"

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6) Migrate users in web application
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$wa = get-SPWebApplication http://mum-its-spqa1:91
$wa.MigrateUsers($true)
$wa.ProvisionGlobally()
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7) Add/deploy/Remove the solutions in web application
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Add-SPSolution -LiteralPath c:\contoso_solution.wsp

Install-SPSolution -Identity contoso_solution.wsp -GACDeployment -CompatibilityLevel 15



Uninstall-SPSolution -Identity contoso_solution.wsp Remove-SPSolution -Identity contoso_solution.wsp