HP 3PAR StoreServ Concepts Guide: HP 3PAR OS 3.1.3

The Host Explorer Software Agent.............................................................................................32
6 Chunklets................................................................................................34
Overview..............................................................................................................................34
Physical Disk Chunklets............................................................................................................34
Spare Chunklets.....................................................................................................................34
7 LDs.........................................................................................................36
Overview..............................................................................................................................36
LDs and Common Provisioning Groups......................................................................................36
LD Types................................................................................................................................36
RAID Types............................................................................................................................37
RAID 0.............................................................................................................................37
RAID 1 and RAID 10..........................................................................................................37
RAID 5 and RAID 50..........................................................................................................38
RAID MP or RAID 6...........................................................................................................39
LD Size and RAID Types..........................................................................................................40
8 Common Provisioning Groups....................................................................41
Overview..............................................................................................................................41
Precautions and Planning.........................................................................................................41
Growth Increments, Warnings, and Limits..............................................................................41
Growth Increment..............................................................................................................41
Growth Warning...............................................................................................................42
Growth Limit......................................................................................................................42
System Guidelines for Creating CPGs........................................................................................43
Volume Types Associated with CPGs.........................................................................................43
9 Virtual Volumes........................................................................................44
Overview..............................................................................................................................44
Virtual Volume Types...............................................................................................................44
Administrative Volumes.......................................................................................................45
Fully-provisioned Virtual Volumes..........................................................................................45
Thinly Provisioned Virtual Volumes........................................................................................45
TPVV Warnings and Limits..............................................................................................46
Virtual Volume Online Conversion.............................................................................................46
Physical Copies......................................................................................................................47
Virtual Copy Snapshots...........................................................................................................47
Virtual Copy Snapshot Relationships.....................................................................................48
Copy-on-Write Function..................................................................................................49
Copy-of and Parent Relationships....................................................................................50
Exporting Virtual Volumes........................................................................................................50
VLUN Templates and Active VLUNs......................................................................................50
VLUN Template Types.........................................................................................................50
Host Sees.....................................................................................................................51
Host Set.......................................................................................................................51
Port Presents.................................................................................................................51
Matched Set.................................................................................................................51
10 Reclaiming Unused Space........................................................................52
Overview..............................................................................................................................52
Reclaiming Unmapped LD Space from CPGs..............................................................................52
Reclaiming Unmapped LD Space from Volumes..........................................................................53
Automatically Reclaiming Unused Snapshot Space from Volumes..................................................53
Manually Reclaiming Unused Snapshot Space from Volumes........................................................53
Deleted Volume Snapshot Space..............................................................................................53
Logical Disks and Chunklet Initialization....................................................................................53
4 Contents