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Show Table of Contents
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  1. Storage Administration Guide
  2. 1. Overview
    1. 1.1. What's New in Red Hat Enterprise Linux 6
  3. I. File Systems
    1. 2. File System Structure and Maintenance
      1. 2.1. Overview of Filesystem Hierarchy Standard (FHS)
        1. 2.1.1. FHS Organization
      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
      1. 3.1. Mounting a File System as Encrypted
      2. 3.2. Additional Information
    3. 4. Btrfs
    4. 5. The Ext3 File System
      1. 5.1. Creating an Ext3 File System
      2. 5.2. Converting to an Ext3 File System
      3. 5.3. Reverting to an Ext2 File System
    5. 6. The Ext4 File System
      1. 6.1. Creating an Ext4 File System
      2. 6.2. Mounting an Ext4 File System
      3. 6.3. Resizing an Ext4 File System
      4. 6.4. Backup ext2/3/4 File Systems
      5. 6.5. Restore an ext2/3/4 File System
      6. 6.6. Other Ext4 File System Utilities
    6. 7. Global File System 2
    7. 8. The XFS File System
      1. 8.1. Creating an XFS File System
      2. 8.2. Mounting an XFS File System
      3. 8.3. XFS Quota Management
      4. 8.4. Increasing the Size of an XFS File System
      5. 8.5. Repairing an XFS File System
      6. 8.6. Suspending an XFS File System
      7. 8.7. Backup and Restoration of XFS File Systems
      8. 8.8. Other XFS File System Utilities
    8. 9. Network File System (NFS)
      1. 9.1. How NFS Works
        1. 9.1.1. Required Services
      2. 9.2. pNFS
      3. 9.3. NFS Client Configuration
        1. 9.3.1. Mounting NFS File Systems using /etc/fstab
      4. 9.4. autofs
        1. 9.4.1. Improvements in autofs Version 5 over Version 4
        2. 9.4.2. autofs Configuration
        3. 9.4.3. Overriding or Augmenting Site Configuration Files
        4. 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
        1. 9.7.1. The /etc/exports Configuration File
        2. 9.7.2. The exportfs Command
        3. 9.7.3. Running NFS Behind a Firewall
        4. 9.7.4. Hostname Formats
        5. 9.7.5. NFS over RDMA
      8. 9.8. Securing NFS
        1. 9.8.1. NFS Security with AUTH_SYS and export controls
        2. 9.8.2. NFS security with AUTH_GSS
        3. 9.8.3. File Permissions
      9. 9.9. NFS and rpcbind
        1. 9.9.1. Troubleshooting NFS and rpcbind
      10. 9.10. References
    9. 10. FS-Cache
      1. 10.1. Performance Guarantee
      2. 10.2. Setting Up a Cache
      3. 10.3. Using the Cache With NFS
        1. 10.3.1. Cache Sharing
        2. 10.3.2. Cache Limitations With NFS
      4. 10.4. Setting Cache Cull Limits
      5. 10.5. Statistical Information
      6. 10.6. References
  4. II. Storage Administration
    1. 11. Storage Considerations During Installation
      1. 11.1. Updates to Storage Configuration During Installation
      2. 11.2. Overview of Supported File Systems
      3. 11.3. Special Considerations
    2. 12. File System Check
      1. 12.1. Best Practices for fsck
      2. 12.2. Filesystem-Specific Information for fsck
        1. 12.2.1. ext2, ext3, and ext4
        2. 12.2.2. XFS
        3. 12.2.3. Btrfs
    3. 13. Partitions
      1. 13.1. Viewing the Partition Table
      2. 13.2. Creating a Partition
        1. 13.2.1. Making the Partition
        2. 13.2.2. Formatting and Labeling the Partition
        3. 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)
      1. 14.1. What is LVM2?
      2. 14.2. Using system-config-lvm
        1. 14.2.1. Utilizing Uninitialized Entities
        2. 14.2.2. Adding Unallocated Volumes to a Volume Group
        3. 14.2.3. Migrating Extents
        4. 14.2.4. Adding a New Hard Disk Using LVM
        5. 14.2.5. Adding a New Volume Group
        6. 14.2.6. Extending a Volume Group
        7. 14.2.7. Editing a Logical Volume
      3. 14.3. LVM References
    5. 15. Swap Space
      1. 15.1. Adding Swap Space
        1. 15.1.1. Extending Swap on an LVM2 Logical Volume
        2. 15.1.2. Creating an LVM2 Logical Volume for Swap
        3. 15.1.3. Creating a Swap File
      2. 15.2. Removing Swap Space
        1. 15.2.1. Reducing Swap on an LVM2 Logical Volume
        2. 15.2.2. Removing an LVM2 Logical Volume for Swap
        3. 15.2.3. Removing a Swap File
      3. 15.3. Moving Swap Space
    6. 16. Disk Quotas
      1. 16.1. Configuring Disk Quotas
        1. 16.1.1. Enabling Quotas
        2. 16.1.2. Remounting the File Systems
        3. 16.1.3. Creating the Quota Database Files
        4. 16.1.4. Assigning Quotas per User
        5. 16.1.5. Assigning Quotas per Group
        6. 16.1.6. Setting the Grace Period for Soft Limits
      2. 16.2. Managing Disk Quotas
        1. 16.2.1. Enabling and Disabling
        2. 16.2.2. Reporting on Disk Quotas
        3. 16.2.3. Keeping Quotas Accurate
      3. 16.3. Disk Quota References
    7. 17. Redundant Array of Independent Disks (RAID)
      1. 17.1. RAID Types
      2. 17.2. RAID Levels and Linear Support
      3. 17.3. Linux RAID Subsystems
      4. 17.4.  RAID Support in the Installer
      5. 17.5.  Configuring RAID Sets
      6. 17.6. Advanced RAID Device Creation
    8. 18. Using the mount Command
      1. 18.1. Listing Currently Mounted File Systems
        1. 18.1.1. Specifying the File System Type
      2. 18.2. Mounting a File System
        1. 18.2.1. Specifying the File System Type
        2. 18.2.2. Specifying the Mount Options
        3. 18.2.3. Sharing Mounts
        4. 18.2.4. Moving a Mount Point
      3. 18.3. Unmounting a File System
      4. 18.4. mount Command References
        1. 18.4.1. Manual Page Documentation
        2. 18.4.2. Useful Websites
    9. 19. The volume_key function
      1. 19.1. Commands
      2. 19.2. Using volume_key as an individual user
      3. 19.3. Using volume_key in a larger organization
        1. 19.3.1. Preparation for saving encryption keys
        2. 19.3.2. Saving encryption keys
        3. 19.3.3. Restoring access to a volume
        4. 19.3.4. Setting up emergency passphrases
      4. 19.4. volume_key References
    10. 20. Access Control Lists
      1. 20.1. Mounting File Systems
        1. 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
      1. 21.1. Deployment Considerations
      2. 21.2. Tuning Considerations
    12. 22. Write Barriers
      1. 22.1. Importance of Write Barriers
      2. 22.2. Enabling/Disabling Write Barriers
      3. 22.3. Write Barrier Considerations
    13. 23. Storage I/O Alignment and Size
      1. 23.1. Parameters for Storage Access
      2. 23.2. Userspace Access
      3. 23.3. Standards
      4. 23.4. Stacking I/O Parameters
      5. 23.5. Logical Volume Manager
      6. 23.6. Partition and File System Tools
    14. 24. Setting Up A Remote Diskless System
      1. 24.1. Configuring a tftp Service for Diskless Clients
      2. 24.2. Configuring DHCP for Diskless Clients
      3. 24.3. Configuring an Exported File System for Diskless Clients
    15. 25. Device Mapper Multipathing and Virtual Storage
      1. 25.1. Virtual Storage
      2. 25.2. DM-Multipath
  5. III. Online Storage
    1. 26. Fibre Channel
      1. 26.1. Fibre Channel API
      2. 26.2. Native Fibre Channel Drivers and Capabilities
    2. 27. Set up an iSCSI Target and Initiator
      1. 27.1. iSCSI Target Creation
      2. 27.2. iSCSI Initiator Creation
    3. 28. Persistent Naming
      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
      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
      1. 35.1. Viewing Available iface Configurations
      2. 35.2. Configuring an iface for Software iSCSI
      3. 35.3. Configuring an iface for iSCSI Offload
      4. 35.4. Binding/Unbinding an iface to a Portal
    11. 36. Scanning iSCSI Targets with Multiple LUNs or Portals
    12. 37. Resizing an Online Logical Unit
      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
        1. 37.4.1. Rescanning logical units
        2. 37.4.2. Updating the R/W state of a multipath device
        3. 37.4.3. Documentation
    13. 38. Adding/Removing a Logical Unit Through rescan-scsi-bus.sh
    14. 39. Modifying Link Loss Behavior
      1. 39.1. Fibre Channel
      2. 39.2. iSCSI Settings With dm-multipath
        1. 39.2.1. NOP-Out Interval/Timeout
        2. 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
  6. A. Revision History
  7. Legal Notice

37.4.3. Documentation

Further information can be found in the Red Hat Knowledgebase. To access this, navigate to https://www.redhat.com/wapps/sso/login.html?redirect=https://access.redhat.com/knowledge/ and log in. Then access the article at https://access.redhat.com/kb/docs/DOC-32850.
  • 37.4.2. Updating the R/W state of a multipath device
  • 38. Adding/Removing a Logical Unit Through rescan-scsi-bus.sh
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