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Oracle Solaris 11.1 Administration: ZFS File Systems     Oracle Solaris 11.1 Information Library
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Document Information

Preface

1.  Oracle Solaris ZFS File System (Introduction)

2.  Getting Started With Oracle Solaris ZFS

3.  Managing Oracle Solaris ZFS Storage Pools

4.  Managing ZFS Root Pool Components

Managing ZFS Root Pool Components (Overview)

ZFS Root Pool Requirements

ZFS Root Pool Space Requirements

ZFS Root Pool Configuration Requirements

Managing Your ZFS Root Pool

Installing a ZFS Root Pool

How to Update Your ZFS Boot Environment

How to Mount an Alternate BE

How to Configure a Mirrored Root Pool (SPARC or x86/VTOC)

How to Configure a Mirrored Root Pool (x86/EFI (GPT))

How to Replace a Disk in a ZFS Root Pool (SPARC or x86/VTOC)

How to Replace a Disk in a ZFS Root Pool (SPARC or x86/EFI (GPT))

How to Create a BE in Another Root Pool (SPARC or x86/VTOC)

How to Create a BE in Another Root Pool (SPARC or x86/EFI (GPT))

Managing Your ZFS Swap and Dump Devices

Adjusting the Sizes of Your ZFS Swap and Dump Devices

Troubleshooting ZFS Dump Device Issues

Booting From a ZFS Root File System

Booting From an Alternate Disk in a Mirrored ZFS Root Pool

Booting From a ZFS Root File System on a SPARC Based System

Booting From a ZFS Root File System on an x86 Based System

Booting For Recovery Purposes in a ZFS Root Environment

How to Boot the System For Recovery Purposes

5.  Managing Oracle Solaris ZFS File Systems

6.  Working With Oracle Solaris ZFS Snapshots and Clones

7.  Using ACLs and Attributes to Protect Oracle Solaris ZFS Files

8.  Oracle Solaris ZFS Delegated Administration

9.  Oracle Solaris ZFS Advanced Topics

10.  Oracle Solaris ZFS Troubleshooting and Pool Recovery

11.  Archiving Snapshots and Root Pool Recovery

12.  Recommended Oracle Solaris ZFS Practices

A.  Oracle Solaris ZFS Version Descriptions

Index

Managing Your ZFS Swap and Dump Devices

During the installation process, a swap area is created on a ZFS volume in the ZFS root pool. For example:

# swap -l
swapfile                  dev    swaplo   blocks     free
/dev/zvol/dsk/rpool/swap 145,2        16 16646128 16646128

During the installation process, a dump device is created on a ZFS volume in the ZFS root pool. In general, a dump device requires no administration because it is set up automatically at installation time. For example:

# dumpadm
      Dump content: kernel pages
       Dump device: /dev/zvol/dsk/rpool/dump (dedicated)
Savecore directory: /var/crash/
  Savecore enabled: yes
   Save compressed: on

If you disable and remove the dump device, then you will need to enable it with the dumpadm command after it is recreated. In most cases, you will only have to adjust the size of the dump device by using the zfs command.

For information about the swap and dump volume sizes that are created by the installation programs, see ZFS Root Pool Requirements.

Both the swap volume size and the dump volume size can be adjusted after installation. For more information, see Adjusting the Sizes of Your ZFS Swap and Dump Devices.

Consider the following issues when working with ZFS swap and dump devices:

Adjusting the Sizes of Your ZFS Swap and Dump Devices

You might need to adjust the size of swap and dump devices after installation or possibly, recreate the swap and dump volumes.

Troubleshooting ZFS Dump Device Issues

Review the following items if you have problems either capturing a system crash dump or resizing the dump device.