Hitachi Freedom Storage Lightning 9900 V series Configuration Manual page 13

Note 1: The availability of a specific 9900V device type depends on the level of microcode
installed on the 9900V subsystem.
Note 2: The device capacity can sometimes be changed by the BIOS or host adapter board.
These device capacities are calculated based on 1 MB = 1024
Note 3: The number of blocks for a Virtual LVI/LUN volume is calculated as follows:
# of blocks = (# of data cylinders) × (# of heads) × (# of sectors per track)
Example: For an OPEN-3 VLL volume with capacity = 37 MB:
# of blocks = (53 cylinders) × (15 heads) × (96 sectors per track) = 76320
Note 4: The number of data cylinders for a Virtual LVI/LUN volume (including VLL LUSE
volumes) is calculated as follows:
(↑...↑ means that the value should be rounded up to the next integer)
The number of data cylinders for an OPEN-* VLL volume =
# of cylinders = ↑ (capacity (MB)) × 1024/720 ↑
Example: For an OPEN-3 VLL volume with capacity = 37 MB:
# of cylinders = ↑37 × 1024/720↑ = ↑52.62↑ (rounded up to next integer) = 53 cylinders
The number of data cylinders for a 3390-3A/C VLL volume =
# of cylinders = (number of cylinders) + 9
The number of data cylinders for a 3390-3B VLL volume =
# of cylinders = (number of cylinders) + 7
Note 5: The size of an OPEN-x VLL volume is specified by capacity in MB, not by number of
cylinders. The user specifies the volume size.
Hitachi Lightning 9900™ V Series Red Hat
2
bytes rather than 1000
Linux Configuration Guide
® ®
2
bytes.
5