Storage Administration Guide
1. Overview
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1. 1.1. What's New in Red Hat Enterprise Linux 6
I. File Systems
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1. 2. File System Structure and Maintenance
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  1. 2.1. Overview of Filesystem Hierarchy Standard (FHS)
    
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    2.1.1. FHS Organization
    
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    2.1.1.1. Gathering File System Information
    
    2.1.1.2. The /boot/ Directory
    
    2.1.1.3. The /dev/ Directory
    
    2.1.1.4. The /etc/ Directory
    
    2.1.1.5. The /lib/ Directory
    
    2.1.1.6. The /media/ Directory
    
    2.1.1.7. The /mnt/ Directory
    
    2.1.1.8. The /opt/ Directory
    
    2.1.1.9. The /proc/ Directory
    
    2.1.1.10. The /sbin/ Directory
    
    2.1.1.11. The /srv/ Directory
    
    2.1.1.12. The /sys/ Directory
    
    2.1.1.13. The /usr/ Directory
    
    2.1.1.14. The /var/ Directory
  2. 2.2. Special Red Hat Enterprise Linux File Locations
  3. 2.3. The /proc Virtual File System
  4. 2.4. Discard unused blocks
2. 3. Encrypted File System
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  1. 3.1. Mounting a File System as Encrypted
  2. 3.2. Additional Information
3. 4. Btrfs
4. 5. The Ext3 File System
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5. 6. The Ext4 File System
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6. 7. Global File System 2
7. 8. The XFS File System
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8. 9. Network File System (NFS)
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  1. 9.1. How NFS Works
    
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    9.1.1. Required Services
  2. 9.2. pNFS
  3. 9.3. NFS Client Configuration
    
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    9.3.1. Mounting NFS File Systems using /etc/fstab
  4. 9.4. autofs
    
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    9.4.1. Improvements in autofs Version 5 over Version 4
    
    9.4.2. autofs Configuration
    
    9.4.3. Overriding or Augmenting Site Configuration Files
    
    9.4.4. Using LDAP to Store Automounter Maps
  5. 9.5. Common NFS Mount Options
  6. 9.6. Starting and Stopping NFS
  7. 9.7. NFS Server Configuration
    
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    9.7.1. The /etc/exports Configuration File
    
    9.7.2. The exportfs Command
    
    Expand section "9.7.2. The exportfs Command" Collapse section "9.7.2. The exportfs Command"
    
    9.7.2.1. Using exportfs with NFSv4
    
    9.7.3. Running NFS Behind a Firewall
    
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    9.7.3.1. Discovering NFS exports
    
    9.7.4. Hostname Formats
    
    9.7.5. NFS over RDMA
  8. 9.8. Securing NFS
    
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    9.8.1. NFS Security with AUTH_SYS and export controls
    
    9.8.2. NFS security with AUTH_GSS
    
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    9.8.2.1. NFS security with NFSv4
    
    9.8.3. File Permissions
  9. 9.9. NFS and rpcbind
    
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    9.9.1. Troubleshooting NFS and rpcbind
  10. 9.10. References
9. 10. FS-Cache
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  1. 10.1. Performance Guarantee
  2. 10.2. Setting Up a Cache
  3. 10.3. Using the Cache With NFS
    
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    10.3.1. Cache Sharing
    
    10.3.2. Cache Limitations With NFS
  4. 10.4. Setting Cache Cull Limits
  5. 10.5. Statistical Information
  6. 10.6. References
II. Storage Administration
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1. 11. Storage Considerations During Installation
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2. 12. File System Check
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  1. 12.1. Best Practices for fsck
  2. 12.2. Filesystem-Specific Information for fsck
    
    Expand section "12.2. Filesystem-Specific Information for fsck" Collapse section "12.2. Filesystem-Specific Information for fsck"
    
    12.2.1. ext2, ext3, and ext4
    
    12.2.2. XFS
    
    12.2.3. Btrfs
3. 13. Partitions
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  1. 13.1. Viewing the Partition Table
  2. 13.2. Creating a Partition
    
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    13.2.1. Making the Partition
    
    13.2.2. Formatting and Labeling the Partition
    
    13.2.3. Add to /etc/fstab
  3. 13.3. Removing a Partition
  4. 13.4. Resizing a Partition
4. 14. LVM (Logical Volume Manager)
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  1. 14.1. What is LVM2?
  2. 14.2. Using system-config-lvm
    
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    14.2.1. Utilizing Uninitialized Entities
    
    14.2.2. Adding Unallocated Volumes to a Volume Group
    
    14.2.3. Migrating Extents
    
    14.2.4. Adding a New Hard Disk Using LVM
    
    14.2.5. Adding a New Volume Group
    
    14.2.6. Extending a Volume Group
    
    14.2.7. Editing a Logical Volume
  3. 14.3. LVM References
5. 15. Swap Space
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  1. 15.1. Adding Swap Space
    
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    15.1.1. Extending Swap on an LVM2 Logical Volume
    
    15.1.2. Creating an LVM2 Logical Volume for Swap
    
    15.1.3. Creating a Swap File
  2. 15.2. Removing Swap Space
    
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    15.2.1. Reducing Swap on an LVM2 Logical Volume
    
    15.2.2. Removing an LVM2 Logical Volume for Swap
    
    15.2.3. Removing a Swap File
  3. 15.3. Moving Swap Space
6. 16. Disk Quotas
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  1. 16.1. Configuring Disk Quotas
    
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    16.1.1. Enabling Quotas
    
    16.1.2. Remounting the File Systems
    
    16.1.3. Creating the Quota Database Files
    
    16.1.4. Assigning Quotas per User
    
    16.1.5. Assigning Quotas per Group
    
    16.1.6. Setting the Grace Period for Soft Limits
  2. 16.2. Managing Disk Quotas
    
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    16.2.1. Enabling and Disabling
    
    16.2.2. Reporting on Disk Quotas
    
    16.2.3. Keeping Quotas Accurate
  3. 16.3. Disk Quota References
7. 17. Redundant Array of Independent Disks (RAID)
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8. 18. Using the mount Command
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  1. 18.1. Listing Currently Mounted File Systems
    
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    18.1.1. Specifying the File System Type
  2. 18.2. Mounting a File System
    
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    18.2.1. Specifying the File System Type
    
    18.2.2. Specifying the Mount Options
    
    18.2.3. Sharing Mounts
    
    18.2.4. Moving a Mount Point
  3. 18.3. Unmounting a File System
  4. 18.4. mount Command References
    
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    18.4.1. Manual Page Documentation
    
    18.4.2. Useful Websites
9. 19. The volume_key function
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  1. 19.1. Commands
  2. 19.2. Using volume_key as an individual user
  3. 19.3. Using volume_key in a larger organization
    
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    19.3.1. Preparation for saving encryption keys
    
    19.3.2. Saving encryption keys
    
    19.3.3. Restoring access to a volume
    
    19.3.4. Setting up emergency passphrases
  4. 19.4. volume_key References
10. 20. Access Control Lists
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  1. 20.1. Mounting File Systems
    
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    20.1.1. NFS
  2. 20.2. Setting Access ACLs
  3. 20.3. Setting Default ACLs
  4. 20.4. Retrieving ACLs
  5. 20.5. Archiving File Systems With ACLs
  6. 20.6. Compatibility with Older Systems
  7. 20.7. ACL References
11. 21. Solid-State Disk Deployment Guidelines
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  1. 21.1. Deployment Considerations
  2. 21.2. Tuning Considerations
12. 22. Write Barriers
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13. 23. Storage I/O Alignment and Size
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14. 24. Setting Up A Remote Diskless System
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15. 25. Device Mapper Multipathing and Virtual Storage
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  1. 25.1. Virtual Storage
  2. 25.2. DM-Multipath
III. Online Storage
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1. 26. Fibre Channel
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  1. 26.1. Fibre Channel API
  2. 26.2. Native Fibre Channel Drivers and Capabilities
2. 27. Set up an iSCSI Target and Initiator
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  1. 27.1. iSCSI Target Creation
  2. 27.2. iSCSI Initiator Creation
3. 28. Persistent Naming
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  1. 28.1. WWID
  2. 28.2. UUID and Other Persistent Identifiers
4. 29. Removing a Storage Device
5. 30. Removing a Path to a Storage Device
6. 31. Adding a Storage Device or Path
7. 32. Configuring a Fibre-Channel Over Ethernet Interface
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  1. 32.1. Fibre-Channel over Ethernet (FCoE) Target Set up
8. 33. Configuring an FCoE Interface to Automatically Mount at Boot
9. 34. Scanning Storage Interconnects
10. 35. Configuring iSCSI Offload and Interface Binding
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11. 36. Scanning iSCSI Targets with Multiple LUNs or Portals
12. 37. Resizing an Online Logical Unit
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  1. 37.1. Resizing Fibre Channel Logical Units
  2. 37.2. Resizing an iSCSI Logical Unit
  3. 37.3. Updating the Size of Your Multipath Device
  4. 37.4. Changing the Read/Write State of an Online Logical Unit
    
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    37.4.1. Rescanning logical units
    
    37.4.2. Updating the R/W state of a multipath device
    
    37.4.3. Documentation
13. 38. Adding/Removing a Logical Unit Through rescan-scsi-bus.sh
14. 39. Modifying Link Loss Behavior
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  1. 39.1. Fibre Channel
  2. 39.2. iSCSI Settings With dm-multipath
    
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    39.2.1. NOP-Out Interval/Timeout
    
    39.2.2. replacement_timeout
  3. 39.3. iSCSI Root
15. 40. Controlling the SCSI Command Timer and Device Status
16. 41. Online Storage Configuration Troubleshooting
A. Revision History
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A Red Hat training course is available for Red Hat Enterprise Linux

14.3. LVM References

Use these sources to learn more about LVM.

Installed Documentation

rpm -qd lvm2 — This command shows all the documentation available from the lvm package, including man pages.
lvm help — This command shows all LVM commands available.

Useful Websites

http://sources.redhat.com/lvm2 — LVM2 webpage, which contains an overview, link to the mailing lists, and more.
http://tldp.org/HOWTO/LVM-HOWTO/ — LVM HOWTO from the Linux Documentation Project.

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14.3. LVM References

Installed Documentation

Useful Websites