HP-UX System Administrator's Guide: Overview

Kernel Modules.............................................................................................................43
Adding/Removing Kernel Modules........................................................................43
Kernel Tunables.............................................................................................................44
The HP-UX Directory Structure.........................................................................................44
Key HP-UX Directories.................................................................................................45
Storage on HP-UX...............................................................................................................48
Storage Uses..................................................................................................................49
How Storage is Organized............................................................................................49
Physical Storage Devices..........................................................................................49
Volume Managers....................................................................................................50
Selecting a Volume Manager..............................................................................51
Volume Groups........................................................................................................52
(Logical) Volumes....................................................................................................53
File Systems..............................................................................................................53
Supported File Systems......................................................................................54
Efficient Data Access.....................................................................................................54
Disk Striping............................................................................................................55
Distributing Disk Access..........................................................................................55
File System Type......................................................................................................56
Establishing Multiple Paths to a Device (for efficiency)..........................................56
Disk Mirroring (for performance)............................................................................56
Storage and Data Redundancy......................................................................................56
Establishing Multiple Paths to a Device (for redundancy)......................................57
RAIDs and other Disk Arrays..................................................................................57
Disk Mirroring.........................................................................................................57
Data Backups............................................................................................................58
Backup Utilities...................................................................................................58
How Storage is Addressed............................................................................................59
Device Special Files..................................................................................................60
The Anatomy of a Device Special File................................................................61
Legacy versus Agile Device Addressing............................................................62
Device Special File Directories (and Name Formats).........................................64
Mass Storage Hardware Paths (three formats)...................................................66
Commands Associated with Device Special Files..............................................67
For More Information on the Next Generation Mass Storage Stack..................69
Managing HP-UX Swap Space......................................................................................69
Types of Swap Space................................................................................................69
Device Swap........................................................................................................69
File System Swap................................................................................................70
Pseudo Swap.......................................................................................................70
Lazy Swap...........................................................................................................71
Primary and Secondary Swap Space.......................................................................71
Estimating Your Swap Space Needs........................................................................71
Enabling Swap Space...............................................................................................72
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