Hitachi Universal Storage Platform V Configuration Manual page 20

Table 1-3
Category
SCSI Disk
FX
* The SCSI disk devices can also be used as raw devices (e.g., some database
applications use raw devices).
Note 3: The BIOS or HBA can sometimes change the device capacity. These
device capacities are calculated based on 1 MB = 1024
2
1000 bytes.
Note 4: 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)
(The number of sectors per track is 128 for OPEN-V and 96 for the other
emulation types.)
Example: For an OPEN-3 VLL volume with capacity = 37 MB:
# of blocks = (53 cylinders – see Note 3) × (15 heads) × (96 sectors
per track) = 76320
1-8
Hitachi Universal Storage Platform V/VM Configuration Guide for SGI
Volume Usage for Device Categories
Device Type
OPEN-x, OPEN-x VLL, OPEN-x*n LUSE, OPEN-x*n VLL
LUSE
(SCSI disk devices can also be used as raw devices. For
example, some database applications use raw devices.
3390-3A/B/C
3390-3A/B/C VLL
OPEN-x for FXoto, OPEN-x VLL for FXoto
Introduction
Volume
Usage
File System*
Raw Device
2
bytes rather than
® ®
IRIX Host Attachment