Maintaining the Transport Directory 
Procedure
For
tp , the transport directory must fulfill the following requirements (depending on the operating system):UNIX
In a transport network, there must be a single physical transport directory that can be reached from each host with the same path.
In UNIX systems, this directory can be a soft link, pointing to the correct transport directory or mount point.
You must store the chosen path in two parameters:
The default value for the transport directory is /usr/sap/trans in UNIX.
Windows NT
Transport groups comprised of Windows NT systems or Windows NT and UNIX systems are supported.
For more information on creating a heterogeneous transport group, see
Transport Control Under Windows NT.SAP allows you to name a central transport host on the Domain Name Server that is valid for all NT systems.
For more information on specifying a central transport host on the domain name server, see
Specifying the Central Transport Host.Each transport group must have a single physical transport directory that can be accessed by all machines.
This directory is described by the parameters:
If you have entered a transport host on the domain name server, the directory is under
Otherwise it is under
\\$(SAPGLOBALHOST)\sapmnt\trans .The transport directory is described by the following parameters:
Name of the host configured as the central transport host on the domain name server
Name of the host on which the central system is installed
Global share that points to the

Note the different naming conventions used for the parameters
The path entered for the parameter
DIR_TRANS does not end with a "\", whereas the path entered for the parameter transdir does end with a "\":DIR_TRANS = T:
transdir = T:\

The
DIR_TRANS profile parameter that you set and the parameter transdir in the transport profile must point to the same transport directory.AS/400
In a transport network, there must be a single physical transport directory that can be reached from each host with the same path.
In AS/400 systems, this can be a soft link pointing to the correct transport directory or mount point.
You must store the chosen path in two parameters:
The default value for the transport directory is /usr/sap/trans in AS/400.