HP StorageWorks XP10000 Disk Array - Manual (Page 20)

• LU (logical unit). An LDEV used by open-system hosts is called an LU. The arrays support a
maximum of 1024 LU paths per fibre-channel port. An open-system LU on a fibre-channel interface
can be mapped to one or more LDEVs.
• LDEV (logical device). The mainframe systems support a maximum of 65,280 LDEVs. An LDEV
used by mainframe hosts can be called a device, a logical volume image (LVI), or a volume.
For open system volumes, the XP12000/XP10000 disk arrays support a maximum of only 16,384
LDEVs. An LDEV used by open-system hosts can be called a device (for example, SCSI disk device
or raw device) or a logical unit (LU or LUN).
IMPORTANT:
This guide contains information about internal disks or LDEVs in an array. Unlike the
XP12000/XP10000 Disk Arrays, the SVS 200 does not have internal disks. Therefore, information
about internal disks or LDEVs in an array does not apply to the SVS 200.
• Java™ applet program. The XP Remote Web Console is provided as a Java™ applet program.
When an XP Remote Web Console user accesses and logs on to the desired SVP, the Java™
applet is downloaded from the SVP (web server) to the XP Remote Web Console client. The
Java™ applet program runs on a web browser on the XP Remote Web Console client.
• RMI™ (remote method invocation). RMI™ is a remote procedure call that allows Java™ objects
stored in the network to be run remotely. In the XP Remote Web Console network environment, the
XP Remote Web Console downloads Java™ objects from the SVP.
• CU (control unit). The arrays support a maximum of 255 logical CU images for mainframe
systems and 64 logical CU images for open systems. These images are numbered sequentially
from 0-FE. Each CU image controls up to 256 LDEVs. LDEVs within the arrays are accessed by
a combination of CU image number and device number (00-FF). Table 2 shows an example
of the device numbers for each CU image.
20 Overview of XP Remote Web Console Operations