Red Hat ENTERPRISE LINUX 5 - LOGICAL VOLUME MANAGER ADMINISTRATION Manual page 4

Logical Volume Manager Administration
4.3.10. Splitting a Volume Group ............................................................................... 28
4.3.11. Combining Volume Groups ............................................................................. 29
4.3.12. Backing Up Volume Group Metadata .............................................................. 29
4.3.13. Renaming a Volume Group ............................................................................ 29
4.3.14. Moving a Volume Group to Another System .................................................... 30
4.3.15. Recreating a Volume Group Directory ............................................................. 30
4.4. Logical Volume Administration ..................................................................................... 30
4.4.1. Creating Logical Volumes ................................................................................. 31
4.4.2. Persistent Device Numbers .............................................................................. 36
4.4.3. Resizing Logical Volumes ................................................................................ 36
4.4.4. Changing the Parameters of a Logical Volume Group ........................................ 36
4.4.5. Renaming Logical Volumes .............................................................................. 36
4.4.6. Removing Logical Volumes .............................................................................. 37
4.4.7. Displaying Logical Volumes .............................................................................. 37
4.4.8. Growing Logical Volumes ................................................................................. 38
4.4.9. Extending a Striped Volume ............................................................................. 38
4.4.10. Shrinking Logical Volumes .............................................................................. 40
4.5. Creating Snapshot Volumes ........................................................................................ 41
4.6. Controlling LVM Device Scans with Filters ................................................................... 42
4.7. Online Data Relocation ............................................................................................... 43
4.8. Activating Logical Volumes on Individual Nodes in a Cluster .......................................... 43
4.9. Customized Reporting for LVM .................................................................................... 44
4.9.1. Format Control ................................................................................................ 44
4.9.2. Object Selection .............................................................................................. 46
4.9.3. Sorting LVM Reports ........................................................................................ 52
4.9.4. Specifying Units ............................................................................................... 53
5. LVM Configuration Examples
5.1. Creating an LVM Logical Volume on Three Disks ......................................................... 55
5.1.1. Creating the Physical Volumes ......................................................................... 55
5.1.2. Creating the Volume Group .............................................................................. 55
5.1.3. Creating the Logical Volume ............................................................................. 55
5.1.4. Creating the File System .................................................................................. 56
5.2. Creating a Striped Logical Volume .............................................................................. 56
5.2.1. Creating the Physical Volumes ......................................................................... 56
5.2.2. Creating the Volume Group .............................................................................. 57
5.2.3. Creating the Logical Volume ............................................................................. 57
5.2.4. Creating the File System .................................................................................. 57
5.3. Splitting a Volume Group ............................................................................................ 58
5.3.1. Determining Free Space .................................................................................. 58
5.3.2. Moving the Data .............................................................................................. 58
5.3.3. Splitting the Volume Group ............................................................................... 59
5.3.4. Creating the New Logical Volume ..................................................................... 59
5.3.5. Making a File System and Mounting the New Logical Volume ............................. 59
5.3.6. Activating and Mounting the Original Logical Volume .......................................... 60
5.4. Removing a Disk from a Logical Volume ..................................................................... 60
5.4.1. Moving Extents to Existing Physical Volumes .................................................... 60
5.4.2. Moving Extents to a New Disk .......................................................................... 61
5.5. Creating a Mirrored LVM Logical Volume in a Cluster ................................................... 63
6. LVM Troubleshooting
6.1. Troubleshooting Diagnostics ........................................................................................ 67
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