Compaq 9900 - Manual (Page 91)

Hitachi Lightning 9900™ User and Reference Guide 77
4.4.1 Configuring the Fibre-Channel Ports
The LUN Manager remote console software enables users to configure the fibre-channel ports
for the connected operating system and operational environment (e.g., FC-AL or fabric). If
desired, Hitachi Data Systems can configure the fibre-channel ports as a fee-based service.
For further information on LUN Manager, see Hitachi Freedom Storage™ Lightning 9900™ LUN
Manager User’s Guide (MK-91RD049), or contact your Hitachi Data Systems account team.
The 9960 subsystem supports a maximum of 32 fibre-channel ports, and the 9910 supports up
to 24 fibre-channel ports. Each fibre-channel port is assigned a unique target ID (from 0 to
EF). The 9900 subsystem supports up to 256 LUNs per port. Figure 4.24 illustrates fibre port-
to-LUN addressing.
One 9900
fibre port
LUN
0 to 255
Host
Initiator ID
Target ID Target ID
Other Fibre
device
Other Fibre
device
Each fibre TID must be
unique and within the range
from 0 to EF (hexadecimal).
Figure 4.24 Fibre Port-to-LUN Addressing
4.4.2 Virtual LVI/LUN Devices
The Virtual LVI/LUN remote console software enables users to configure custom-size LUs
which are smaller than standard-size LUs. Open-system users define Virtual LVI/LUN devices
by size in MB (minimum device size = 35 MB). S/390
® mainframe user define Virtual LVI/LUN
devices by number of cylinders.
4.4.3 LU Size Expansion (LUSE) Devices
The LUSE function (included in the LUN Manager remote console software) enables users to
configure size-expanded LUs which are from 2 to 36 times larger than standard-size LUs.
LUSE devices are identified by the type and number of LDEVs which have been joined to
form the single LUSE device. For example, an OPEN-9*36 LUSE device is composed of 36
OPEN-9 LDEVs.