HP P9000 Provisioning for Mainframe Systems User Guide (AV400-96369, October 2011)
Number of control cylinders
(cyl)
Maximum CV capacity (cyl)Minimum CV capacity
(cyl)
Emulation type
1. For 3390-A, the incremental unit of the CV capacity is the capacity from 0 to 65,520 cylinders is defined as the
1 user-cylinder, and the capacity from 65,521 to 262,668 cylinders is defined as the 1,113 user-cylinder. Therefore,
if you specify a value in Remote Web Console in the Create LDEVs window that exceeds 65,520 cylinders, the
value is corrected to multiples of 1,113 cylinders. For instance, if 65,521 is specified, the value is corrected to
65,667, which is 59 times 1,113 cylinders.
2. For 3390-V, the value specified in the Create LDEVs window is corrected to multiples of 44.8 cylinders (38,976
KB) such that the number of cylinders is truncated after the decimal point. For instance, if 10,000 is specified,
10,035 appears. This value is truncated after the decimal point of 10,035.2, that is 224 times 44.8 cylinders.
3. If the CV of 3390-V is registered to the pool of Thin Provisioning Z, 8 GB or more free space in the pool is necessary.
If you create a CV of 3390-V, specify the capacity at more than 9,633 cylinders.
SSID requirements
The storage system is configured with one SSID (storage system identifier) for each group of 64
or 256 devices, so there are one or four SSIDs per CU image. Each SSID must be unique to each
connected host system. SSIDs are user-specified and are assigned during storage system installation
in hexadecimal format, from 0004 to FEFF.
The following table shows the relationship between controller emulation types and SSIDs.
Virtual LVI SupportSSID requirementController emulation type
3390-3, 3390-3A, 3390-3B, 3390-3C, 3390-9,
3390-9A, 3390-9B, 3390-9C volumes
0004 to FEFF2105, 2107
3380-3, 3380-3A, 3380-3B, 3380-3C, 3390-3,
3390-3A, 3390-3B, 3390-3C, 3390-3R, 3390-9,
0004 to FEFF2105-F20, 2107
3390-9A, 3390-9B, 3390-9C, 3390-L, 3390-LA,
3390-LB, 3390-LC, 3390-M, 3390-MA, 3390-MB,
3390-MC volumes
VLL size calculations
When creating a CV, you can specify the capacity of each CV. However, rounding will produce
different values for the user-specified CV capacity and the actual entire CV capacity. To estimate
the actual capacity of a CV, use a mathematical formula. The following topics explain how to
calculate the user area capacity and the entire capacity of a CV.
The capacity of a CV or an LDEV consists of two types of capacity. One type is the user area
capacity that stores the user data. The second type is the capacities of all areas that are necessary
for an LDEV implementation including control information. The sum of these two types of capacities
is called the entire capacity.
Implemented LDEVs consume this entire capacity from the parity group capacity without exception.
Therefore, even if the sum of user areas of multiple CVs and the user area of one CV are the same
size, the free space generated when multiple CVs are created may be smaller than the free space
generated when one CV is created.
If the data protection level is set to the Enhanced mode on the SATA drive, you must calculate the
entire capacity of all CVs in existence and the entire capacity of CVs in the Enhanced mode of the
data protection level.
When using RAID Manager, the specified size of CVs is created regardless of the capacity
calculation. Therefore, even if the same capacity size (for example, 1 TB) appears, the actual
capacity size might be different between the CVs created by RAID Manager and the CVs created
by Remote Web Console.
Calculating the size of a mainframe volume
To calculate the entire capacity of a CV by cylinder, use one of the following formulas:
28 Configuring custom-sized provisioning