HP XP20000/XP24000 Configuration Manual - Page 27

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HP XP20000/XP24000 Configuration Manual
Note 2:
The devices are defined to the host as SCSI disk devices, even though the interface is Fibre Channel.
Note 3:
The command device (used for XP Raid Manager) is distinguished by -CM on the product name (for
example, OPEN-3-CM, OPEN-3-CVS-CM).
Note 4:
The device capacity can sometimes be changed by the BIOS or host adapter board. This may make
actual capacity different from that listed in the table.
Note 5:
The number of blocks for a CVS volume is calculated as follows:
# of blocks = (# of cylinders) x (# of heads) x (# of sectors per track)
Example
For an OPEN-3 CVS volume with capacity = 37 MB:
# of blocks = (53 cylinders see Note 5) x (15 heads) x
(96 sectors per track) = 76320
Example
For an OPEN-V CVS volume with capacity = 49 MB:
# of blocks = (53 cylinders see Note 5) x (15 heads) x
(128 sectors per track) = 101760
Note 6:
The number of cylinders for a CVS volume is calculated as follows ( ... means that the value should
be rounded up to the next integer):
OPEN-3/8/9/E: The number of cylinders for a CVS volume = # of cylinders = (capacity (MB)
specified by user) x 1024/720
Example
For an OPEN-3 CVS volume with capacity = 37 MB:
# of cylinders =
(rounded up to next integer) = 53 cylinders
OPEN-V: The number of cylinders for a CVS volume = # of cylinders = (capacity (MB) specified by
user) x 16/15
Example
For an OPEN-V CVS volume with capacity = 49 MB:
# of cylinders =
(rounded up to next integer) = 53 cylinders
OPEN-3/8/9/E: The number of cylinders for a CVS LUSE volume = # of cylinders = (capacity (MB)
specified by user) x 1024/720 x n
Example
For a CVS LUSE volume with capacity = 37 MB and n = 4:
# of cylinders =
37 x 1024/720
=
49 x 16/15
=
52.26
37 x 1024/720
x 4 =
XP Disk Array Configuration Guide for Windows
52.62
52.62
x 4 = 53 x 4 = 212
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