TLIB volume 2 (TVOL2) through TLIB volume n (TVOLn)

TVOL2 through TVOLn are volumes used for data sets that do not fit on TVOL1. They are for the z/OS® product set; see Product set for z/OS and closely-related products for more information about the z/OS product set. Products you want to install separately should be placed instead on licensed program volumes or subsystem volumes.

The recommended types of TVOL2 through TVOLn data sets are described as follows. Note that the type of a data set is known within the Recommended System Layout function in ServerPac and dump-by-data set SystemPac. The data set type can also be found within the product's program directory.

Fixed-block CLIST and EXEC libraries (only if variable-block CLIST and EXEC libraries were used on TVOL1).
Sample and JCL libraries.
Source libraries.
Macro libraries.
Workstation libraries (which are combined in the data libraries).
Softcopy libraries into which SMP/E installs.
Font and printing libraries.
Text libraries.
Flat files that SMP/E cannot manage (interface repositories and so forth, excluding documents).
MMS-compiled and MMS-source data sets. MMS-source data sets are those data sets that are used as input into the MMS compiler.
SMP/E target CSI.
SMP/E target data sets: SMPLTS, SMPMTS, SMPSTS, SMPSCDS.
User catalog for the SMP/E target CSI and MMS-compiled data sets.

If you find that just one volume (TVOL2) is not enough, and you require other volumes (TVOL3 for instance), you could place groups of data sets (rather than individual data sets) on one volume or the other. Some examples of groupings are:

Operational data sets, such as flat files, font and printing libraries, MMS-compiled libraries, and user catalogs.
VSAM data sets, such as the target CSI, MMS-compiled clusters, and user catalog.
SMP/E work data sets, such as SMPLTS, SMPSCDS, SMPMTS, and SMPSTS.

Remember that these data sets are replaced by a subsequent ServerPac or SystemPac (dump-by-data-set format) installation and associated customization.