8.193.3 Parameter
size
The value of xsize must be a valid decimal number. The actual upper limit is deter-
mined by the host system’s architecture, the operating system and on some sys-
tems the amount of physical memory and paging space that is available.
Storage sizes not on a 1M boundary are rounded up to the next 1M boundary. The
lower limit and default is 0.
M
‘M’ determines that the number given is specified in megabytes (multiplier 2**20).
This is the default if no unit is appended.
G
‘G’ determines that the number given is specified in gigabytes (multiplier 2**30).
T
‘ T’ determines that the number given is specified in terabytes (multiplier 2**40). On
32-bit machines the unit terabytes is not available.
LOCK
Attempt to lock the storage (pages locked by the host operating system).
UNLOCK
Leave the store unlocked (no pages locked by the host operating system). This is
the default.
Notes:
The actual upper limit is determined by the host system’s architecture and operating system, the guest
operating system and the amount of physical memory and available paging space.
The total of MAINSIZE and XPNDSIZE on host systems with a 32-bit architecture will be limited to less
than 4G; host systems with a 64-bit architecture will be limited to less than 16E.
Use of storage sizes greater than supported by the guest operating system may generate incorrect
results or error conditions within the guest operating system.
8.193.4 Overview Storage Allocation Units
Unit
Multiplier
Name (Symbol)
IEC Name (IEC Symbol)
Restrictions
M
2**20
Megabyte (MB)
Mebibyte (MiB)
G
2**30
Gigabyte (GB)
Gibibyte (GiB)
T
2**40
Terabyte (TB)
Tebibyte (TiB)
Not on 32-bit machines
Table 24: Storage Allocation Units