Found it -

ESS cache and NVS reporting
RMF cache reporting and the results of a LISTDATA STATUS command
report a cache size of 4,8, 12, 16, 32 GB and an NVS size of 1 GB —
half the actual size.
This is because the information returned represents only the cluster to
which the logical control unit is attached.

Chapter 5.11 Performance - z/OS environment tools.
The book is IBM Total Storage Enterprise Storage Server Modell  800
Number : SG24-6424

Frank Krueger

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