HP XP20000/XP24000 HP StorageWorks XP Disk Array Configuration Guide for Linux - Page 31

Note 1, Note 2, Note 3, Note 4, Note 5, Note 6

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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 = 37 × 1024/720 = 52.62 (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 = 49 × 16/15 = 52.26 (rounded up to next integer) = 53 cylinders XP Disk Array Configuration Guide for Linux 31

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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 =
37 × 1024/720
=
52.62
(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 =
49 × 16/15
=
52.26
(rounded up to next integer) = 53 cylinders
XP Disk Array Configuration Guide for Linux
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