Red Hat ENTERPRISE LINUX 4 - LVM ADMINISTRATOR manuals

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Table of contents

Red Hat Enterprise Linux 6

1

Logical Volume

1

Manager Administration

1

Administration

2

LVM Administrator Guide

2

Edition 1

2

Introduction

7

5. We Need Feedback!

8

6. Document Conventions

8

6.2. Pull-quote Conventions

10

6.3. Notes and Warnings

10

Notes and Warnings

11

1.1. New and Changed Features

13

1.2. Logical Volumes

14

# chkconfig clvmd on

17

# service clvmd start

17

1.5. Document Overview

18

LVM Components

21

2.2. Volume Groups

22

2.3. LVM Logical Volumes

23

2.3.4. Snapshot Volumes

26

LVM Administration Overview

29

3.4. Logical Volume Backup

30

3.5. Logging

31

LVM Administration with CLI

33

Commands

33

4.3.1. Creating Volume Groups

37

4.3.9. Removing Volume Groups

42

# vgmerge -v databases my_vg

43

# lvconvert -m1 vg00/lvol1

51

# lvconvert -m0 vg00/lvol1

51

# lvconvert --merge @some_tag

53

# lvreduce -l -3 vg00/lvol1

54

# lvchange -pr vg00/lvol1

54

# lvrename vg02 lvold lvnew

54

4.6. Online Data Relocation

60

4.8.1. Format Control

61

4.8.2. Object Selection

63

The vgs Command

65

The lvs Command

66

4.8.3. Sorting LVM Reports

69

4.8.4. Specifying Units

69

LVM Configuration Examples

71

5.3. Splitting a Volume Group

73

5.3.1. Determining Free Space

74

5.3.2. Moving the Data

74

5.4.2.3. Moving the Data

77

LVM Troubleshooting

81

Appendix A. The Device Mapper

91

offsetN

94

0 65536 error

97

A.2. The dmsetup Command

101

A.2.2. The dmsetup ls Command

102

dmsetup command

107

B.2. Sample lvm.conf File

109

Sample lvm.conf File

111

Appendix C. LVM Object Tags

121

Appendix D. LVM Volume Group

123

Metadata

123

D.3. Sample Metadata

124

Sample Metadata

125

Appendix E. Revision History

127





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