HP XP20000/XP24000 HP StorageWorks XP Disk Array Configuration Guide (T5278-96 - Page 148

OPEN-3/8/9/E, Table 41 Emulation specifications OpenVMS

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Table 41 Emulation specifications (OpenVMS) (continued) Emulation1 Category2 Product name3 Blocks Sector size (512 bytes) (bytes) # of cylinders OPEN-E CVS OPEN-V SCSI disk OPEN-E-CVS Footnote5 SCSI disk OPEN-V Footnote5 512 Footnote6 512 Footnote6 CVS LUSE OPEN-3*n CVS OPEN-8*n CVS OPEN-9*n CVS OPEN-E*n CVS OPEN-V*n SCSI disk OPEN-3*n-CVS SCSI disk OPEN-8*n-CVS SCSI disk OPEN-9*n-CVS SCSI disk OPEN-E*n-CVS SCSI disk OPEN-V*n Footnote5 Footnote5 Footnote5 Footnote5 Footnote5 512 Footnote6 512 Footnote6 512 Footnote6 512 Footnote6 512 Footnote6 Heads Sectors Capacity MB* 4 per track 15 96 Footnote7 15 128 Footnote7 15 96 Footnote7 15 96 Footnote7 15 96 Footnote7 15 96 Footnote7 15 128 Footnote7 General notes: *Capacity = (512 x number of blocks) ÷ 10242 The value n is the number of volumes combined together. For example, with 8 combined volumes: OPEN-V*8. 1The availability of an emulation depends on the disk array. 2The devices are defined to the host as SCSI disk devices, even though the interface is Fibre Channel. 3The command device (used for RAID Manager) is distinguished by -CM on the product name (for example, OPEN-3-CM, OPEN-3-CVS-CM). 4This 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. 5The 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 6The number of cylinders for a CVS volume is calculated as follows ( ... should be rounded up to the next integer): means that the value 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 148 Disk array supported emulations

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Table 41 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
96
15
Footnote
6
512
Footnote
5
OPEN-E-CVS
SCSI disk
OPEN-E
CVS
Footnote
7
128
15
Footnote
6
512
Footnote
5
OPEN-V
SCSI disk
OPEN-V
CVS LUSE
Footnote
7
96
15
Footnote
6
512
Footnote
5
OPEN-3*n-CVS
SCSI disk
OPEN-3*n
CVS
Footnote
7
96
15
Footnote
6
512
Footnote
5
OPEN-8*n-CVS
SCSI disk
OPEN-8*n
CVS
Footnote
7
96
15
Footnote
6
512
Footnote
5
OPEN-9*n-CVS
SCSI disk
OPEN-9*n
CVS
Footnote
7
96
15
Footnote
6
512
Footnote
5
OPEN-E*n-CVS
SCSI disk
OPEN-E*n
CVS
Footnote
7
128
15
Footnote
6
512
Footnote
5
OPEN-V*n
SCSI disk
OPEN-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
148
Disk array supported emulations