HP XP Cache LUN Software - Manual (Page 17)

Cache LUN XP user guide for the XP12000/XP10000/SVS200 17
LDEV tree
The LDEV tree displays the CU number (for example, CU 00) and LDEV number (for example, LDEV 00)
available for Cache LUN XP operations in a tree. The tree uses the following icons to show the settings:
The LDEV tree does not show Auto LUN-reserved volumes because they cannot be used in Cache LUN XP
operations.
LDEV table
Information about the LDEV selected in the tree appears on a single line in the upper-right portion of the
pane. It includes LDEV number, emulation type, capacity, RAID level, and VMA information.
The LDEV’s capacity is shown in MB for open systems, or cylinders and tracks for mainframe systems. The
table shows the cache settings for the LDEV selected in the tree and contains the following columns:
• LBA (open systems only): Displays the logical block starting and ending addresses.
• CC HH (mainframe systems only): Displays the cylinder and head starting and ending addresses.
• Capacity: Displays the capacity of the cache extent in megabytes for open systems. Displays the
capacity of the cache extent in cylinders and tracks for mainframe systems.
• Mode: Displays the mode of the cache extent. PRIO indicates priority mode, BIND indicates bind mode,
and
- indicates that the LDEV is not assigned to the cache.
• Prestage: If this is blank, then pre-staging is not set. ON indicates that pre-staging is set.
Cache LUN XP pie chart
The text above the pie chart lists the used cache and the amount of free space left in cache. For the
XP12000/XP10000/SVS200, it also lists the total Cache LUN XP area and size that can be created in the
SLPR (storage logical partition).
In the pie chart, pink indicates the amount of cache available, blue shows cache used, and yellow shows
the size of the specified cache extent.
Cache settings section
Sets the mode and area for data that will reside in the Cache LUN XP cache. Also displays the settings for
an existing cache extent. This area contains the following:
• Cache LUN Mode): Select the Cache LUN XP mode by clicking either Bind or Prio.
• Prestaging Mode: Select the Prestaging check box (located above the LDEV tree) to perform the
pre-staging operation, and then click
Apply. Click Yes if pre-staging is enabled. Click No if pre-staging
is disabled.
• Start: The starting address for data that will reside in the cache. This is expressed as a logical block
address for open systems and as a cylinder and head address for mainframe systems.
• End: The ending address for data that will reside in the cache. This is expressed as a logical block
address for open systems and as a cylinder and head address for mainframe systems.
NOTE: If you specify the VMA volume, and it has not been set for Cache LUN XP yet, the next LBA of LBAs
for the VMA appears in the Start box.
• Select All Area: If you select this check box, all data areas in the selected LDEV will be set to Cache
LUN XP cache.
Table 3 Cache LUN XP icons
Icon Description
Indicates an LDEV for which Cache LUN XP is not set.
Indicates an LDEV for which Cache LUN XP is set.
Indicates a LUSE volume (two or more LDEVs) for which Cache LUN XP is not set.