HP XP Cache LUN Software - Manual (Page 13)

Cache LUN XP user guide for the XP1024/XP128 13
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, and RAID level.
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 pie chart
The text above the pie chart lists the used cache and the amount of free space left in cache.
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 Type: 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.
• From: 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.
• To: 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.
• Select All Area check box: If you select this check box, all data areas in the selected LDEV will be set to
Cache LUN XP cache.
This check box can be selected if no data areas in the selected LDEV are set to Cache LUN XP cache.
This check box cannot be selected and is grayed out if some data areas in the selected LDEV are set to
Cache LUN XP cache. If you select the Select All Area check box, nothing will be set to the starting
address and the ending address, and the From and To fields remain empty.
• Possible Cache LUN Size: Displays the size you can set. Bind displays the size you should set for bind
mode and Prio displays the size you should set for priority mode.
• Multi Set / Release check box: Selecting this check box and then clicking Set displays the Multi Set
pane, which you can use to make Cache LUN XP settings on more than one LDEV. Selecting this check
box and then clicking Release displays the Multi Release pane, which you can use to cancel Cache
LUN XP settings on more than one LDEV.
Data that will reside in the Cache LUN XP cache is specified by the starting address in the From field
and the ending address in the To field. When the Select All Area check box is selected, all data areas
of the selected LDEVs will be set for the Cache LUN XP.
If you cancel the settings, all the settings specified for the LDEV will be canceled.
The Multi Set / Release check box does not select and cancel an individual Cache LUN XP data area
specified for the LDEV. You must use the Release button to cancel an individual Cache LUN XP data
area.