HP XP20000/XP24000 Configuration Manual page 25

Hp storageworks xp disk array configuration guide: vmware (a5951-96106, september 2010)
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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 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
OPEN-3/8/9/E: The number of cylinders for a CVS LUSE volume = # of cylinders = (capacity (MB)
specified by user) × 1024/720 × n
Example
For a CVS LUSE volume with capacity = 37 MB and n = 4:
# of cylinders =
37 × 1024/720
=
49 × 16/15
=
52.26
37 × 1024/720
× 4 =
52.62
52.62
× 4 = 53 × 4 = 212
XP Disk Array Configuration Guide: VMware
25

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