HP XP20000/XP24000 HP StorageWorks XP Disk Array Configuration Guide (T5278-96 - Page 167

Byte information table, Notes for disk parameters

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Table 53 OPEN-E parameters by emulation type (IBM AIX) (continued) Parameter fe e partition fragment size ff f partition fragment size fg g partition fragment size fh h partition fragment size See "Notes for disk parameters". OPEN-E 1,024 1,024 1,024 1,024 Emulation Type OPEN-E*n (n=2 to OPEN-E CVS 36) 1,024 1,024 1,024 1,024 1,024 1,024 1,024 1,024 OPEN-E CVS*n (n=2 to 36) 1024 1,024 1,024 1,024 Notes for disk parameters 1The value of pc is calculated as follows: pc = nc * nt * ns The nc of OPEN-x CVS corresponds to the capacity specified by SVP or remote console. The CVS size of OPEN-x is specified by capacity (megabyte), not by number of cylinders. The number of cylinders of an OPEN-x CVS volume can be obtained by the following calculation ( ... means round up to integer). The number of cylinders = (specified capacity in megabytes from SVP or remote console) x 1,024 / 720 . Example When 37 MB is specified for an OPEN-3 CVS volume from SVP, the number of cylinders of the OPEN-3 CVS can be calculated as follows: 37 x 1,024 / 720 = 52.62 52.62 = 53 The OPEN-3 CVS volume has 53 cylinders. 2The value of pa must be equal to or more than 131,072. 3The number of cylinders of a Logical Unit Size Expansion (LUSE) composed of OPEN-x CVS volumes corresponds to the capacity specified by the SVP or the remote console. CVS size of OPEN-x is specified by the capacity (megabytes), not by the number of cylinders. The number of cylinders of the OPEN-x CVS volume can be obtained by the following calculation ( ... means round up to integer): The number of cylinders = (specified capacity in megabytes from SVP or remote console) x 1,024 / 720 x n where n is the number of concatenated volumes for LUSE. Example When 37 MB is specified for the OPEN-3 CVS volume and the four volumes are concatenated, the number of cylinders of the OPEN-3 CVS can be calculated as follows: 37 x 1,024 / 720 x 4 = 52.62 x 4 = 53 x 4 = 212 The LUSE for the OPEN-3 CVS volume has 212 cylinders. Byte information table Values in this table assume that large files are stored in large volumes, and the maximum number of files stored in each device type is approximately the same for each device type. IBM AIX 167

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Table 53 OPEN-E parameters by emulation type (IBM AIX)
(continued)
Emulation Type
OPEN-E CVS*n
(n=2 to 36)
OPEN-E CVS
OPEN-E*n (n=2 to
36)
OPEN-E
Parameter
1024
1,024
1,024
1,024
e partition fragment size
fe
1,024
1,024
1,024
1,024
f partition fragment size
ff
1,024
1,024
1,024
1,024
g partition fragment size
fg
1,024
1,024
1,024
1,024
h partition fragment size
fh
See
“Notes for disk parameters”
.
Notes for disk parameters
1
The value of pc is calculated as follows:
pc = nc * nt * ns
The nc of OPEN-x CVS corresponds to the capacity specified by SVP or remote console.
The CVS size of OPEN-x is specified by capacity (megabyte), not by number of cylinders.
The number of cylinders of an OPEN-x CVS volume can be obtained by the following calculation
(
...
means round up to integer).
The number of cylinders =
(specified capacity in megabytes from SVP or remote console) x 1,024
/ 720
.
Example
When 37 MB is specified for an OPEN-3 CVS volume from SVP,
the number of cylinders of the OPEN-3 CVS can be
calculated as follows:
37 x 1,024 / 720 = 52.62
52.62
= 53
The OPEN-3 CVS volume has 53 cylinders.
2
The value of pa must be equal to or more than 131,072.
3
The number of cylinders of a Logical Unit Size Expansion (LUSE) composed of OPEN-x CVS
volumes corresponds to the capacity specified by the SVP or the remote console. CVS size of
OPEN-x is specified by the capacity (megabytes), not by the number of cylinders. The number of
cylinders of the OPEN-x CVS volume can be obtained by the following calculation (
...
means
round up to integer):
The number of cylinders =
(specified capacity in megabytes from SVP or remote console) x 1,024
/ 720
x
n
where
n
is the number of concatenated volumes for LUSE.
Example
When 37 MB is specified for the OPEN-3 CVS volume and the
four volumes are concatenated, the number of cylinders of
the OPEN-3 CVS can be calculated as follows:
37 x 1,024 / 720
x 4 =
52.62
x 4 = 53 x 4 = 212
The LUSE for the OPEN-3 CVS volume has 212 cylinders.
Byte information table
Values in this table assume that large files are stored in large volumes, and the maximum number
of files stored in each device type is approximately the same for each device type.
IBM AIX
167