* USER IVPM2 IVPASS 320K 1M G ACCOUNT ACT5 IVPM2 CONSOLE 009 3210 SPOOL OOC 2540 READER A SPOOL ODD 2540 PUNCH A SPOOL OOE 1403 A 3350 starter System Supplied Directory MDISK 191 3350 002 001 CPRnLO WR READ WRITE LINK MAINT 194 194 RR
LINK MAINT 190 190 RR
* USER RSCS RSCS 512K ACCOUNT ACT6 RSCS OPTION ECMODE CONSOLE 009 3215 SPOOL 001 2540 READER A SPOOL OOC 2540 READER A SPOOL OOD 2540 PUNCH A SPOOL OOE 1403 A MDISK 191 3350 003 003 CPRnLO WR READ WRITE LINK MAINT 190 190 RR
DEDICATE OBl 078 DEDICATE OB2 079 DEDICATE OB3 07A * USER ECMODE ECMODE 512K 1M G ACCOUNT ACT7 ECMODE OPTION ECMODE REALTIMER CONSOLE 009 3215 SPOOL OOC 2540 READER A SPOOL OOD 2540 PUNCH A SPOOL OOE 1403 A MDISK 191 3350 016 004 CPRnLO WR READ WRITE LINK MAINT 194 194 RR
LINK MAINT 190 190 RR
* USER OPERATNS OPERATNS 512K 1M BCEG ACCOUNT ACT8 OPERATNS CONSOLE 009 3215 SPOOL OOC 2540 READER A SPOOL OOD 2540 PUNCH A SPOOL OOE 1403 A
LINK MAINT 190 190 RR
****************
*
* THE FOLLOWING MINIDISK ENTRY IS PROVIDED AS AN EXAMPLE OF * THE SPACE RECOMMENDED FOR AN IPCS VIRTUAL MACHINE. * IF YOU INTEND TO USE THE OPERATNS USERID AS YOUR IPCS * VIRTUAL MACHINE, YOU SHOULD CHANGE THE FOLLOWING STATEMENT * TO ALLOCATE MINIDISK SPACE ON ONE OF YOUR SYSTEM DASD VOLUMES. *
* MDISK 191 3350 XXX 003 YYYYYY WR READ WRITE *
****************
*
*
* CYLINDERS 065 TO 555 ARE UNUSED AND MAY BE USED FOR * ANY OTHER VIRTUAL MINI DISK SPACE. IT CAN ALSO BE
* USED FOR PAGING, SPOOLING OR T-DSK SPACE. *
*
* Part 2. Defining Your VM/370 System 195

Directory Program Allocating DASD Space for the VM/370 Directory
Before you create your VM/370 directory using the Directory program, be
sure you have enough DASD space allocated as directory space (DRCT). Use the CP Format/Allocate service program to format and allocate the
cylinders to be used for the VM/370 directory. The cylinders must be
allocated as DRCT. To calculate the total number of cylinders required,
first calculate the total number of records used: NU «NU + NM) x 2) + all other control statements
NR =
+ ----------------------------------------------
169 170 NR = total number of records used NU = number of USER control statements NM = number of MDISK control statements (except for temporary
disks)
Then, calculate the number of cylinders (NC): • For 3330: NC = NR/57 • For 2314,2319: NC = NR/32 • For 2305, 3340: NC = NR/24 • For 3350: NC = NR/120 You should initially format and allocate space for two VM/310 directories. You can then build a new directory whenever needed,
without overlapping the current one, and without formatting and
allocating space each time a new directory is created. If you wish to
reallocate the area in which the directory resides, you must reallocate
the DASD space and then rerun the Directory program. When a VM/310 directory is written, space is allocated from available cylinders, a
full cylinder at a time, and a minimum of two cylinders are used for the VM/370 directory.
Once a new VM/370 directory is successfully written, cylinders used
for the old directory (marked as temporarily allocated during directory
creation) are marked as free. In this way, DASD space allocated for DRCT
cylinders is freed and can be reused for the next directory creation.
If space for two directories is not initially allocated, each time you
want to create a new directory, you must allocate space for the
directory before you create it.
196 IBM VM/370 Planning and System Generation Guide