HP XP7 Disk Array Configuration Guide (H6F56-96003)

Table 37 Emulation specifications (OpenVMS) (continued)
Capacity MB*
4
Sectors
per track
Heads# of
cylinders
Sector size
(bytes)
Blocks
(512 bytes)
Product
name
3
Category
2
Emulation
1
Footnote
7
9615Footnote
6
512Footnote
5
OPEN-E-CVSSCSI diskOPEN-E
CVS
Footnote
7
12815Footnote
6
512Footnote
5
OPEN-VSCSI diskOPEN-V
CVS LUSE
Footnote
7
9615Footnote
6
512Footnote
5
OPEN-3*n-CVSSCSI diskOPEN-3*n
CVS
Footnote
7
9615Footnote
6
512Footnote
5
OPEN-8*n-CVSSCSI diskOPEN-8*n
CVS
Footnote
7
9615Footnote
6
512Footnote
5
OPEN-9*n-CVSSCSI diskOPEN-9*n
CVS
Footnote
7
9615Footnote
6
512Footnote
5
OPEN-E*n-CVSSCSI diskOPEN-E*n
CVS
Footnote
7
12815Footnote
6
512Footnote
5
OPEN-V*nSCSI diskOPEN-V*n
General notes:
*Capacity = (512 x number of blocks) ÷ 1024
2
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 = 37 × 1024/720 = 52.62
(rounded up to next integer) = 53 cylinders
OpenVMS 123