Things HP Cares About

SCSI subsystem improvement
 
Detect LUNs using SCSI 3 REPORT LUN on devices that support it
A /proc interface to trigger LUN discovery on specific targets
Support for large LUN counts (>1024)
Redesign of SCSI error handling
Better support for failover and load balancing

Large system support
Multiple PCI segment support (systems with >256 PCI busses need PCI segments/domains)
Discontiguous memory (we don't do ccNUMA'ish things (yet), but our large systems contain HP chipsets that have certain memory layout requirements)