HP Mainframe Connectivity Design Guide

Table 51 Volume emulation type specifications (continued)
Tracks per cylinder
(bytes per track)Number of cylindersVolume capacity (GB)Volume type
15 (56k)10,0178.513390-9
15 (56K)3,3392.843390-3
P9500 mainframe addressing of volumes
Table 52 (page 99) lists the maximum values for XP7 mainframe configurations.
Table 52 Maximum values for XP7 mainframe configurations
2107 emulationItem
255CU image per DKC
2,048Channel images per CU image
1,024Channel images per CU image per CU port
522,240Channel images per Logical DKC
261,120Logical paths per CU port
522,240Logical paths per Logical DKC
65,280Number of devices
96Buffer to Buffer Credit Count per port
480Concurrent I/Os per CU port
The number of logical paths that can be configured on the mainframe per FICON CHPID and
control unit (CU or LCU) depends on the CU type being emulated in the XP7, as indicated in
Table 53 (page 99). These are mainframe HCD configuration maximums, not XP7 configuration
maximums.
Table 53 Mainframe FICON logical path configurations
Maximum number of
logical paths per LCU
Maximum number of
logical paths per
FICON CHPID
Maximum number of
LDEVs per LCUCUADD range
DASD
nl
emulation type
5122,048256x'00' to x'FF'2107
GDPS/PPRC and GDPS/XRC command support
The XP7 storage system can be integrated into a GDPS/PPRC or GDPS/XRC environment. The
GDPS features that are supported depend on thethe XP7 storage system model and purchased
licenses. For more information, contact an HP storage representative.
Parallel access volumes
PAVs enable a single LPAR to issue multiple I/O requests in parallel to a disk volume. Volumes
with a base address contain data. PAVs are alias addresses assigned to the volume, in addition
to the volume's base address. Therefore, multiple addresses can point to the same volume and
data, allowing I/O operations to run concurrently with the same volume. For example, the mainframe
can issue up to four I/O operations concurrently to a volume that has one base address and three
PAV addresses.
PAV addresses are included in the total number of addresses (volumes) that the XP7 storage system
supports. Table 54 (page 100) lists the number of PAVs supported for each base address in an XP7
storage system.
P9500 mainframe addressing of volumes 99