Draft Document for Review February 7, 2020 3:15 pm 8464axStats.fm Physical volume pools Based on your requirements, you must decide whether TEST and PROD can be on the same  physical volumes, share volumes from the same physical volume pools, or must be placed on  separate physical volumes. Consider the following points: GLYPH<SM590000> If sharing of same physical volumes is  acceptable , all logical volumes from TEST and  PROD are mixed on the physical VOLSERs. Separate pools for PROD and TEST are not  required. GLYPH<SM590000> If sharing of same physical volume ranges is  unacceptable,  total separation of physical  volume ranges can be accomplished by assigning specific physical volume ranges for  each pool and by using the  noborrow/keep  options. The Physical Volume Pool Modify Properties window that is shown in Figure I-4 is used to  define reclaim policies for each of the pools. Assign logical volumes to pool 1 for PROD and  pool 2 for TEST, as shown in Figure I-9 on page 932. Figure I-4 Volume pools for PROD and TEST The TS7700 performs scratch mounts directly to the Tape Volume Cache (TVC) with no  physical tape involvement.  Note:  At Release 3.0 and higher, all categories that are defined as  scratch  inherit the Fast  Ready attribute. In previous releases, it was necessary to set this option in the MI. Define the constructs on all clusters in the grid with definitions consistent with your policies.  Complete the following steps: Scratch categories Defining constructs 1. Define an SC for TEST named TSSCPG0. This SC is for volumes that are unlikely to be  used (level 0 or PG0), as shown in Figure I-5 on page 931. The other SCs must be defined  in a similar way. Ensure that Tape Volume Cache Preference is set according to the  defined SC name. 930  IBM TS7700 Release 5.0 Guide