HP -UX 11i Administrator's Manual page 4

Physical Volume Groups.................................................................................................30
Snapshots and Performance............................................................................................30
Increasing Performance Through Disk Striping........................................................................31
Determining Optimum Stripe Size....................................................................................32
Interactions Between Mirroring and Striping......................................................................33
Increasing Performance Through I/O Channel Separation.......................................................33
Configuring LVM I/O Timeout Parameters..................................................................................33
Planning for Recovery..............................................................................................................34
Preparing for LVM System Recovery......................................................................................35
Example Script for LVM Configuration Recording...............................................................37
3 Administering LVM....................................................................................38
Administration Tools................................................................................................................38
Displaying LVM Information......................................................................................................40
Information on Volume Groups............................................................................................41
Information on Physical Volumes..........................................................................................41
Information on Logical Volumes............................................................................................42
Common LVM Tasks................................................................................................................43
Initializing a Disk for LVM Use.............................................................................................43
Creating a Volume Group...................................................................................................44
Creating the Volume Group Device File............................................................................44
Creating a Version 1.0 Volume Group..............................................................................44
Creating a Version 2.x Volume Group..............................................................................45
Migrating a Volume Group to a Different Version: vgversion....................................................46
Determining the Version of a Volume Group.....................................................................46
Command Syntax..........................................................................................................47
Review Mode: vgversion -r..............................................................................................47
Example of Migrating a Volume Group to a Different Version..............................................48
Migration Recovery.......................................................................................................49
Example Recovery....................................................................................................50
Adding a Disk to a Volume Group.......................................................................................51
Removing a Disk from a Volume Group.................................................................................51
Creating a Logical Volume..................................................................................................52
Creating a Striped Logical Volume..................................................................................52
Creating a Mirrored Logical Volume................................................................................53
Extending a Logical Volume................................................................................................53
Extending a Logical Volume to a Specific Disk..................................................................54
Reducing a Logical Volume.................................................................................................55
Adding a Mirror to a Logical Volume....................................................................................55
Removing a Mirror from a Logical Volume.............................................................................56
Renaming a Logical Volume................................................................................................56
Removing a Logical Volume.................................................................................................57
Exporting a Volume Group..................................................................................................57
Importing a Volume Group..................................................................................................58
Modifying Volume Group Parameters...................................................................................58
vgmodify for a Version 1.0 Volume Group........................................................................59
Example: vgmodify for a Version 1.0 Volume Group..........................................................59
vgmodify for a Version 2.x Volume Group........................................................................62
Example: vgmodify for a Version 2.x Volume Group..........................................................63
Quiescing and Resuming a Volume Group............................................................................65
Renaming a Volume Group.................................................................................................66
Splitting a Volume Group....................................................................................................67
Removing a Volume Group..................................................................................................68
Backing Up a Mirrored Logical Volume.................................................................................68
Backing Up and Restoring Volume Group Configuration..........................................................69
4 Contents