HP XP20000/XP24000 Configuration Manual page 31

The value n is the number of volumes combined together. For example, with 8 combined volumes:
OPEN-V*8.
Note 1:
The availability of an emulation depends on the disk array.
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) × (# of heads) × (# of sectors per track)
Example
For an OPEN-3 CVS volume with capacity = 37 MB:
# of blocks = (53 cylinders–see Note 5) × (15 heads) ×
(96 sectors per track) = 76320
Example
For an OPEN-V CVS volume with capacity = 49 MB:
# of blocks = (53 cylinders–see Note 5) × (15 heads) ×
(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) × 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) × 16/15
Example
For an OPEN-V CVS volume with capacity = 49 MB:
# of cylinders =
(rounded up to next integer) = 53 cylinders
37 × 1024/720 =
49 × 16/15 = 52.26
52.62
XP Disk Array Configuration Guide for Linux 31