VM/370 Storage Requirements
r , I Cylinders , I I I Files 3330 2319 3340 3350 , I I I I PCS modules I , NUC MAP I I problem reports 5 9 14 3 I I symptom summary I I I I 51-2K CP 1.5 3 4 1 , I 512K ALL 2.5 5 7 1.5 I I 1024K CP 3 6 a 1.5 I I 1024K ALL 6 11 16 3 I L
REAL STORAGE The real storage requirement is the normal CP requirement of
approximately 2K for control blocks while the IPCS virtual machine is
logged on. Other real storage usage is controlled by the VM/370 demand
paging implementation.
Estimating DASD Storage Requirements for eMS The following information is intended to help you allocate sufficient
direct access storage space for CMS minidisks. A 2314 cylinder formatted by the CMS FORMAT command contains 150 aOO-byte blocks, which can contain approximately 1300 aO-byte lines of
source programs and data. A 3330 cylinder formatted by the CMS FORMAT command contains 266
BOO-byte blocks, which can contain approximately 2300 aO-byte lines of
source programs and data. A 3340 cylinder formatted by the CMS FORMAT command contains 96 SOO-byte blocks, which can contain approximately 960 80-byte lines of
source programs and data.
A 3350 cylind'er formatted by the CMS FORMAT command contains 570 aOO-byte blocks, which can contain approximately 5000 aO-byte lines of
source programs and data.
Each BOO-byte block contains file control information as well as your
data. A given amount of data requires more file information if put into
many small files instead of a few large files.
For an average CMS user, the following minidisk space should be
sufficient: • 7 cylinders of 2314 space (for approxilla tely 9100 aO-byte lines of
source programs and data) • 4 cylinders of 3330 space (for approximately 9600 . aO-byte lines of
source programs and data) • 11 cylinders of 3340 space (for approximately 10560 aD-byte lines of
source programs and data) • 2 cylinders of 3350 space (for approximately 9120 aO-byte lines of
source programs and data. Part 1. Planning for System Generation 93

94 IBM VM/370 Planning and System Generation Guide