The logical log backup device is specified by the LTAPEDEV parameter
in the database server parameter file. The parameter LTAPESIZE determines
the size of the backup media.
The device is typically a tape drive, but it can be a directory.
If you specify a directory, it is treated like a tape device.
The directory must exist and be writable by
members of the Informix-Admin group.
The directory must exist and be writable by user informix.