Not very relevant any more, and I'm only posting it as a bit of trivia, but there is also a default path for full-text catalogs there.
I wrote a script years ago to run against all of my sQL Servers to make sure the default paths were set according to the standards. I also include calls to xp_create_subdir to make sure the paths I set actually exists.
Declare @DataDir nvarchar(4000),
@LogDir nvarchar(4000),
@BakDir nvarchar(4000),
@FTDir nvarchar(4000),
@DefDataDir nvarchar(4000),
@DefLogDir nvarchar(4000),
@DefBakDir nvarchar(4000),
@DefFTDir nvarchar(4000),
@Instance sysname
Set @Instance = IsNull('\' + Cast(ServerProperty('InstanceName') as sysname), '')
Set @DefDataDir = 'H:\mssql\data' + @Instance
Set @DefLogDir = 'O:\mssql\data' + @Instance
Set @DefBakDir = 'E:\mssql\bak' + @Instance
Set @DefFTDir = 'H:\mssql\FTData' + @Instance
Exec xp_instance_regread N'HKEY_LOCAL_MACHINE',
N'Software\Microsoft\MSSQLServer\MSSQLServer',
N'DefaultData',
@DataDir output,
'no_output'
Exec xp_instance_regread N'HKEY_LOCAL_MACHINE',
N'Software\Microsoft\MSSQLServer\MSSQLServer',
N'DefaultLog',
@LogDir output,
'no_output'
Exec xp_instance_regread N'HKEY_LOCAL_MACHINE',
N'Software\Microsoft\MSSQLServer\MSSQLServer',
N'BackupDirectory',
@BakDir output,
'no_output'
Exec xp_instance_regread N'HKEY_LOCAL_MACHINE',
N'Software\Microsoft\MSSQLServer\MSSQLServer',
N'FullTextDefaultPath',
@FTDir output,
'no_output'
Select Data = @DataDir, Logs = @LogDir, BAK = @BakDir, FTCatalogs = @FTDir
If IsNull(@DataDir, '') <> @DefDataDir
Begin
Exec xp_instance_regwrite N'HKEY_LOCAL_MACHINE', N'Software\Microsoft\MSSQLServer\MSSQLServer', N'DefaultData', REG_SZ, @DefDataDir
End
If IsNull(@LogDir, '') <> @DefLogDir
Begin
Exec xp_instance_regwrite N'HKEY_LOCAL_MACHINE', N'Software\Microsoft\MSSQLServer\MSSQLServer', N'DefaultLog', REG_SZ, @DefLogDir
End
If IsNull(@BakDir, '') <> @DefBakDir
Begin
Exec xp_instance_regwrite N'HKEY_LOCAL_MACHINE', N'Software\Microsoft\MSSQLServer\MSSQLServer', N'BackupDirectory', REG_SZ, @DefBakDir
End
If IsNull(@FTDir, '') <> @DefFTDir
Begin
Exec xp_instance_regwrite N'HKEY_LOCAL_MACHINE', N'Software\Microsoft\MSSQLServer\MSSQLServer', N'FullTextDefaultPath', REG_SZ, @DefFTDir
End
Exec xp_instance_regread N'HKEY_LOCAL_MACHINE',
N'Software\Microsoft\MSSQLServer\MSSQLServer',
N'DefaultData',
@DataDir output,
'no_output'
Exec xp_instance_regread N'HKEY_LOCAL_MACHINE',
N'Software\Microsoft\MSSQLServer\MSSQLServer',
N'DefaultLog',
@LogDir output,
'no_output'
Exec xp_instance_regread N'HKEY_LOCAL_MACHINE',
N'Software\Microsoft\MSSQLServer\MSSQLServer',
N'BackupDirectory',
@BakDir output,
'no_output'
Exec xp_instance_regread N'HKEY_LOCAL_MACHINE',
N'Software\Microsoft\MSSQLServer\MSSQLServer',
N'FullTextDefaultPath',
@FTDir output,
'no_output'
Select Data = @DataDir, Logs = @LogDir, BAK = @BakDir, FTCatalogs = @FTDir
Exec xp_create_subdir @DataDir
Exec xp_create_subdir @LogDir
Exec xp_create_subdir @BakDir
Exec xp_create_subdir @FTDir