Introduction
1-9
Hitachi Universal Storage Platform V/VM Configuration Guide for SGI
®
IRIX
®
Host Attachment
Note 5:
The number of data cylinders for a Virtual LVI/LUN volume is
calculated as follows (
↑
…
↑
means that the value should be rounded up to the
next integer):
The number of data cylinders for an OPEN-
x
VLL volume = (except for OPEN-
V):
# of cylinders =
↑
(capacity (MB)
×
1024/720
↑
Example:
For an OPEN-3 VLL volume with capacity = 37 MB:
# of cylinders =
↑
37
×
1024/720
↑
=
↑
52.62
↑
= 53 cylinders
The number of data cylinders for an OPEN
-
V VLL volume =
# of cylinders =
↑
(capacity (MB) specified by user)
×
16/15
↑
Example:
For an OPEN-V VLL volume with capacity = 50 MB:
# of cylinders =
↑
50
×
16/15
↑
=
↑
53.33
↑
= 54 cylinders
The number of data cylinders for a VLL LUSE volume = (except for OPEN-V):
# of cylinders =
↑
(capacity (MB)
×
1024/720
↑
×
n
Example:
For an OPEN-3 VLL LUSE volume with capacity = 37 MB and n = 4:
# of cylinders =
↑
37
×
1024/720
↑
×
4 =
↑
52.62
↑
×
4 = 53
×
4 = 212
The number of data cylinders for an OPEN
-
V VLL LUSE volume =
# of cylinders =
↑
(capacity (MB) specified by user)
×
16/15
↑
×
n
Example:
For an OPEN-V VLL LUSE volume with capacity = 50 MB and n = 4:
# of cylinders =
↑
50
×
16/15
↑
×
4 =
↑
53.33
↑×
4 = 54
×
4 = 216
The number of data cylinders for a 3390-3A/C =
# of cylinders = (number of cylinders) + 9
The number of data cylinders for a 3390-3B VLL volume =
# of cylinders = (number of cylinders) + 7
Summary of Contents for USP V
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