Hi there,
sounds like you have not followed the required safety precautions.
here is the link for your reference: https://social.msdn.microsoft.com/Forums/sqlserver/en-US/bb0da90a-bb97-4795-9181-2897a300b747/how-do-i-move-a-transaction-log-to-another-drive?forum=sqldisasterrecovery
Now do the following steps.
1) locate the mdf, ldf files
2) shut down the sql server (if you can not take the database offline or no other issues)
3) copy these two files to some other location as a precaution.
4) restart the server then delete the database. (make sure mdf & ldf files are deleted.)
5) now copy back the mdf file and ldf file to the drives where you wanted to place.
6) now attache the mdf & ldf.
follow the link: http://www.serverintellect.com/support/sqlserver/sql-database-attach/