Changing log file location

ALTER DATABASE  databaseName
MODIFY FILE (NAME = log_name, FILENAME = 'F:\logs\database_log.ldf');

I tried the obove statement and get the following error:
MODIFY FILE failed. Do not specify physical name

Any suggestions
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dreadyConnect With a Mentor Commented:
I copied the relevant part from this link:

Hope it helps

Moving user databases
The following example moves a database that is named mydb. This database contains one data file, Mydb.mdf, and one log file, Mydblog.ldf. If the database that you are moving has more data files or log files, specify the files in a comma-delimited list in the sp_attach_db stored procedure. The sp_detach_db procedure does not change regardless of how many files the database contains because the sp_detach_db procedure does not list the files. 1. Detach the database as follows:use master
   sp_detach_db 'mydb'
2. Next, copy the data files and the log files from the current location (D:\Mssql7\Data) to the new location (E:\Sqldata).
3. Re-attach the database. Point to the files in the new location as follows:use master
  sp_attach_db 'mydb','E:\Sqldata\mydbdata.mdf','E:\Sqldata\mydblog.ldf'
Verify the change in file locations by using the sp_helpfile stored procedure:use mydb
The filename column values should reflect the new locations.
Note Microsoft Knowledge Base article 922804 describes an issue for SQL Server 2005 databases on a network-attached storage. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
922804 ( FIX: After you detach a Microsoft SQL Server 2005 database that resides on network-attached storage, you cannot reattach the SQL Server database
Consider this issue. Additionally, consider the permissions that are applied to a database when it is detached in SQL Server 2005. For more information, see the "Detaching and Attaching a Database" section of the "Securing Data and Log Files" topic in SQL Server Books Online. To view this topic, visit the following Microsoft Developer Network (MSDN) Web site:
The only lof file you can move online like this is the log file for tempdb ... follow dready's steps
Racim BOUDJAKDJIConnect With a Mentor Database Architect - Dba - Data ScientistCommented:
I have created the following procedure to ease things on 1MDF/1LDF databases (NDF non handled yet)...Please use with caution (offline operation)...

--1) First Create the procedure...

create procedure sp_move_db_offline(
@dbnamer varchar(50),
@target_data_path_drive varchar(3000),
@target_log_path_drive varchar(3000)
      declare @string_execute1 varchar(1000)
      declare @source_primary_data_path_file varchar(3000), @source_log_path_file varchar(3000)
      declare @final_primary_data_path_file varchar(3000), @final_log_path_file varchar(3000)

      set @source_primary_data_path_file =
      select sa.[filename] from master..sysaltfiles sa
            inner join master..sysdatabases sd
                  on sa.dbid = sd.dbid
      where = @dbnamer and
      upper(right(sa.[filename], 3)) = 'MDF'

      set @source_log_path_file =
      select sa.[filename] from master..sysaltfiles sa
            inner join master..sysdatabases sd
                  on sa.dbid = sd.dbid
      where = @dbnamer and
      upper(right(sa.[filename], 3)) = 'LDF'

      set @final_primary_data_path_file = @target_data_path_drive + '\' + @dbnamer + '.MDF'      
      set @final_log_path_file = @target_log_path_drive + '\' + @dbnamer + '.LDF'
      set @string_execute1 = 'exec sp_detach_db ' + char(39) + @dbnamer + char(39)

      set @string_execute1 = 'copy ' + @source_primary_data_path_file + char(32) + @final_primary_data_path_file
      exec xp_cmdshell @string_execute1

      set @string_execute1 = 'copy ' + @source_log_path_file + char(32) + @final_log_path_file
      select @string_execute1
      exec xp_cmdshell @string_execute1

      waitfor delay '000:00:02'
      set      @string_execute1 = 'sp_attach_db ' + char(39) + @dbnamer + char(39) + ', ' + char(39) + @final_primary_data_path_file + char(39) + ', ' + char(39) + @final_log_path_file + char(39)

--2) Then use it as follows...
--> Make sure folders are created before you run the script...The script does not handle Folder existence check...
--> Won't work on system databases (master, msdb, model, tempdb)

use master
exec sp_move_db_offline 'yourdb', 'target_datafolder', 'target_logfolder'

exec sp_move_db_offline 'Database1', 'D:\SQL2005\DATAFILE', 'D:\SQL2005\LOGFILE'
exec sp_move_db_offline 'Database2', 'D:\SQL2005\DATAFILE', 'D:\SQL2005\LOGFILE'

Hope this helps...

yanci1179Author Commented:
thank you Racimo.  We ended up deattaching databases.  I would've tried yours but didn't see it at the time we were working on changing the file names.  thanks again.
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