HP XP20000/XP24000 Configuration Manual page 148

Table 41 Emulation specifications (OpenVMS) (continued)
1 2
Emulation Category
OPEN-E SCSI disk
CVS
OPEN-V SCSI disk
CVS LUSE
OPEN-3*n SCSI disk
CVS
OPEN-8*n SCSI disk
CVS
OPEN-9*n SCSI disk
CVS
OPEN-E*n SCSI disk
CVS
OPEN-V*n SCSI disk
General notes:
*Capacity = (512 x number of blocks) ÷ 1024
The value n is the number of volumes combined together. For example, with 8 combined volumes:
OPEN-V*8.
1
The availability of an emulation depends on the disk array.
2
The devices are defined to the host as SCSI disk devices, even though the interface is Fibre
Channel.
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).
4
This capacity is the maximum size which can be entered using the lvcreate command. 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.
5
The number of blocks for a CVS volume is calculated as follows:
# of blocks = (# of cylinders) × (# of heads) × (# of sectors per track)
The number of sectors per track is 128 for OPEN-V and 96 for the other emulation types.
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
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
148 Disk array supported emulations
Product Blocks
3
name
(512 bytes)
5
OPEN-E-CVS Footnote
5
OPEN-V Footnote
5
OPEN- 3 *n- C VS Footnote
5
OPEN- 8 *n- C VS Footnote
5
OPEN- 9 *n- C VS Footnote
5
OPEN- E *n- C VS Footnote
5
OPEN-V*n Footnote
37 × 1024/720
Sector size # of
(bytes) cylinders
6
512 Footnote
6
512 Footnote
6
512 Footnote
6
512 Footnote
6
512 Footnote
6
512 Footnote
6
512 Footnote
2
= 52.62
Heads Sectors Capacity MB*
per track
15 96
15 128
15 96
15 96
15 96
15 96
15 128
4
7
Footnote
7
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7
Footnote
7
Footnote
7
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7
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7
Footnote