HP 3PAR StoreServ 7450 2-node HP 3PAR StoreServ Storage Concepts Guide (OS 3.1 - Page 4

The Host Explorer Software Agent 31 6 Chunklets 32 Overview...32 Physical Disk Chunklets...32 Spare Chunklets...32 7 Logical Disks 34 Overview...34 Logical Disks and Common Provisioning Groups 34 Logical Disk Types...34 RAID Types...35 RAID 0...35 RAID 1 and 10...35 RAID 5 and 50...36 RAID Multi-Parity...37 Logical Disk Size and RAID Types 38 8 Common Provisioning Groups 39 Overview...39 Precautions and Planning...39 Growth Increments, Warnings, and Limits 39 Growth Increment...40 Growth Warning...40 Growth Limit...40 System Guidelines for Creating CPGs 41 Volume Types Associated with CPGs 41 9 Virtual Volumes 42 Overview...42 Virtual Volume Types...42 Administrative Volumes...43 Fully-provisioned Virtual Volumes 43 Thinly Provisioned Virtual Volumes 43 TPVV Warnings and Limits 44 Virtual Volume Online Conversion 45 Physical Copies...45 Virtual Copy Snapshots...46 Virtual Copy Snapshot Relationships 46 Copy-on-Write Function 47 Copy-of and Parent Relationships 48 Exporting Virtual Volumes...48 VLUN Templates and Active VLUNs 49 VLUN Template Types...49 Host Sees...49 Host Set...49 Port Presents...49 Matched Set...50 10 Reclaiming Unused Space 51 Overview...51 Reclaiming Unmapped Logical Disk Space from CPGs 51 Reclaiming Unmapped Logical Disk Space from Volumes 52 Automatically Reclaiming Unused Snapshot Space from Volumes 52 Manually Reclaiming Unused Snapshot Space from Volumes 52 Deleted Volume Snapshot Space 52 Logical Disks and Chunklet Initialization 52 4 Contents