Red Hat ENTERPRISE LINUX 4 System Administration Manual page 4

System Administration Guide
3.2.1. Command Line Configuration ................................................................... 53
3.3. Adding PXE Hosts .............................................................................................. 53
3.3.1. Command Line Configuration ................................................................... 55
3.4. Adding a Custom Boot Message ......................................................................... 55
3.5. Performing the PXE Installation ........................................................................... 55
4. Diskless Environments
4.1. Configuring the NFS Server ................................................................................ 57
4.2. Finish Configuring the Diskless Environment ........................................................ 58
4.3. Adding Hosts ..................................................................................................... 58
4.4. Booting the Hosts ............................................................................................... 59
5. Basic System Recovery
5.1. Common Problems ............................................................................................. 61
5.1.1. Unable to Boot into Red Hat Enterprise Linux ............................................ 61
5.1.2. Hardware/Software Problems ................................................................... 61
5.1.3. Root Password ........................................................................................ 61
5.2. Booting into Rescue Mode .................................................................................. 61
5.2.1. Reinstalling the Boot Loader .................................................................... 64
5.3. Booting into Single-User Mode ............................................................................ 64
5.4. Booting into Emergency Mode ............................................................................ 65
II. File Systems
6. The ext3 File System
6.1. Features of ext3 ................................................................................................. 69
6.2. Creating an ext3 File System .............................................................................. 69
6.3. Converting to an ext3 File System ....................................................................... 70
6.4. Reverting to an ext2 File System ........................................................................ 71
7. Logical Volume Manager (LVM)
7.1. What is LVM? .................................................................................................... 73
7.2. What is LVM2? .................................................................................................. 74
7.3. Additional Resources .......................................................................................... 74
7.3.1. Installed Documentation ........................................................................... 74
7.3.2. Useful Websites ...................................................................................... 74
8. LVM Configuration
8.1. Automatic Partitioning ......................................................................................... 77
8.2. Manual LVM Partitioning ..................................................................................... 78
8.2.1. Creating the /boot/ Partition .................................................................. 79
8.2.2. Creating the LVM Physical Volumes ......................................................... 81
8.2.3. Creating the LVM Volume Groups ............................................................ 83
8.2.4. Creating the LVM Logical Volumes ........................................................... 84
9. Redundant Array of Independent Disks (RAID)
9.1. What is RAID? ................................................................................................... 89
9.2. Who Should Use RAID? ..................................................................................... 89
9.3. Hardware RAID versus Software RAID ................................................................ 89
9.3.1. Hardware RAID ....................................................................................... 89
9.3.2. Software RAID ........................................................................................ 90
9.4. RAID Levels and Linear Support ......................................................................... 90
10. Software RAID Configuration
10.1. Creating the RAID Partitions ............................................................................. 93
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