Data ONTAP 7.3 Block Access Management Guide for iSCSI and FC

• Copyright information
• Trademark information
• Preface
• Audience
• Accessing Data ONTAP man pages
• Terminology
• FilerView as an alternative to the command-line interface or user interface
• Command, keyboard, and typographic conventions
• Special messages
• Introduction to block access
• How hosts connect to storage systems
  • What Host Utilities are
  • What ALUA is
  • About SnapDrive for Windows and UNIX
• How Data ONTAP implements an iSCSI network
  • What iSCSI is
  • What iSCSI nodes are
  • Supported configurations
    • How iSCSI is implemented on the host
    • How iSCSI target nodes connect to the network
  • How iSCSI nodes are identified
    • iqn-type designator
    • Storage system node name
    • eui-type designator
  • How the storage system checks initiator node names
  • Default port for iSCSI
  • What target portal groups are
  • What iSNS is
  • What CHAP authentication is
  • How iSCSI communication sessions work
  • How iSCSI works with active/active configurations
  • Setting up the iSCSI protocol on a host and storage system
• How Data ONTAP implements a Fibre Channel SAN
  • What FC is
  • What FC nodes are
  • How FC target nodes connect to the network
  • How FC nodes are identified
    • How WWPNs are used
    • How storage systems are identified
    • About system serial numbers
    • How hosts are identified
    • How switches are identified
• Storage provisioning
• Storage units for managing disk space
• What autodelete is
• What space reservation is
• What fractional reserve is
• Guidelines for provisioning storage in a SAN environment
  • Estimating how large a volume needs to be when using autodelete
  • Estimating how large a volume needs to be when using fractional reserve
    • Calculating the total data size
    • Determining the volume size and fractional reserve setting when you need Snapshot copies
    • Determining the volume size when you do not need Snapshot copies
  • Configuring volumes and LUNs when using autodelete
  • Required changes to SnapShot copy default settings
    • Turning off the automatic Snapshot copy schedule
    • Deleting all existing Snapshot copies in a volume
    • Setting the percentage of snap reserve space to zero
  • Verifying the create_ucode volume option
  • Enabling the create_ucode volume option
• How FlexClone volumes work
  • FlexClone volumes and LUNs
  • FlexClone volumes and space guarantees
  • Creating a FlexClone volume
  • Splitting a FlexClone volume from its parent
  • Determining the parent volume and base Snapshot copy for a FlexClone volume
  • Determining the space used by a FlexClone volume
• About LUNs, igroups, and LUN maps
  • Information required to create a LUN
    • Path name of the LUN
    • Name of the LUN
    • LUN Multiprotocol Type
    • LUN size
    • LUN description
    • LUN identification number
    • Space reservation setting
  • What igroups are
    • igroup example
  • Required information for creating igroups
    • igroup name
    • igroup type
    • igroup ostype
    • iSCSI initiator node name
    • FCP initiator WWPN
  • What LUN mapping is
  • Required information for mapping a LUN to an igroup
    • LUN name
    • igroup name
    • LUN identification number
  • Guidelines for mapping LUNs to igroups
  • Mapping read-only LUNs to hosts at SnapMirror destinations
  • How to make LUNs available on specific FCP target ports
  • Guidelines for LUN layout and space allocation
• Ways to create LUNs, create igroups, and map LUNs to igroups
  • Creating LUNs, creating igroups, and mapping LUNs with the LUN setup program
  • Creating LUNs, creating igroups, and mapping LUNs using individual commands
• Creating LUNs on vFiler units for MultiStore
  • Displaying vFiler LUNs
• LUN management
• Displaying command-line Help for LUNs
• Controlling LUN availability
  • Bringing LUNs online
  • Taking LUNs offline
• Unmapping LUNs from igroups
• Renaming LUNs
• Modifying LUN descriptions
• Enabling and disabling space reservations for LUNs
• Removing LUNs
• Accessing LUNs with NAS protocols
• Checking LUN, igroup, and FCP settings
• Displaying LUN serial numbers
• Displaying LUN statistics
• Displaying LUN mapping information
• Displaying detailed LUN information
• igroup management
• Creating igroups
• Creating FCP igroups on UNIX hosts using the sanlun command
• Deleting igroups
• Adding initiators to an igroup
• Removing initiators from an igroup
• Displaying initiators
• Renaming igroups
• Setting the operating system type for an igroup
• Enabling ALUA for iSCSI and FC igroups
• Creating igroups for a non-default vFiler unit
• Fibre Channel initiator request management
  • How Data ONTAP manages Fibre Channel initiator requests
  • How to use igroup throttles
  • How failover affects igroup throttles
  • Creating igroup throttles
  • Destroying igroup throttles
  • Borrowing queue resources from the unreserved pool
  • Displaying throttle information
  • Displaying igroup throttle usage
  • Displaying LUN statistics on exceeding throttles
• iSCSI network management
• Enabling multi-connection sessions
• Enabling error recovery levels 1 and 2
• iSCSI service management
  • Verifying that the iSCSI service is running
  • Verifying that iSCSI is licensed
  • Enabling the iSCSI license
  • Starting the iSCSI service
  • Stopping the iSCSI service
  • Displaying the target node name
  • Changing the target node name
  • Displaying the target alias
  • Adding or changing the target alias
  • iSCSI service management on storage system interfaces
  • Displaying iSCSI interface status
  • Enabling iSCSI on a storage system interface
  • Disabling iSCSI on a storage system interface
  • Displaying the storage system's target IP addresses
  • iSCSI interface access management
    • Creating iSCSI interface access lists
    • Removing interfaces from iSCSI interface access lists
    • Displaying iSCSI interface access lists
• iSNS server registration
  • What an iSNS server does
  • How the storage system interacts with an iSNS server
  • About iSNS service version incompatibility
  • Setting the iSNS service revision
  • Registering the storage system with an ISNS server
  • Immediately updating the ISNS server
  • Disabling ISNS
  • Setting up vFiler units with the ISNS service
• Displaying initiators connected to the storage system
• iSCSI initiator security management
  • How iSCSI authentication works
  • Guidelines for using CHAP authentication
  • Defining an authentication method for an initiator
  • Defining a default authentication method for an initiator
  • Displaying initiator authentication methods
  • Removing authentication settings for an initiator
• Target portal group management
  • Range of values for target portal group tags
  • Important cautions for using target portal groups
  • Displaying target portal groups
  • Creating target portal groups
  • Destroying target portal groups
  • Adding interfaces to target portal groups
  • Removing interfaces from target portal groups
  • Configuring iSCSI target portal groups
• Displaying iSCSI statistics
  • Definitions for iSCSI statistics
• Displaying iSCSI session information
• Displaying iSCSI connection information
• Guidelines for using iSCSI with active/active configurations
  • Simple active/active configurations with iSCSI
  • Complex active/active configurations with iSCSI
• iSCSI problem resolution
  • LUNs not visible on the host
  • System cannot register with iSNS server
  • No multi-connection session
  • Sessions constantly connecting and disconnecting during takeover
  • Resolving iSCSI error messages on the storage system
• Fibre Channel SAN management
• How to manage FC with active/active configurations
  • What cfmode is
  • Summary of cfmode settings and supported systems
  • cfmode restrictions
  • Overview of single_image cfmode
    • How Data ONTAP avoids igroup mapping conflicts with single_image cfmode
      • igroup ostype conflicts
      • Reserved LUN ID ranges
      • Bringing LUNs online
      • When to override possible mapping conflicts
    • Multipathing requirements for single-image cfmode
    • How Data ONTAP displays information about target ports in single_image cfmode
    • Guidelines for migrating to single_image cfmode
      • Reasons for changing to single_image cfmode
      • Impact of changing to single_image cfmode
      • Downtime planning
  • Overview of partner cfmode
    • Multipathing requirements for partner cfmode
    • What happens when a link fails with partner cfmode
    • What happens during a takeover with partner cfmode
    • How Data ONTAP displays target ports in partner cfmode
  • Overview of standby mode
    • What happens when a link fails with standby cfmode
    • How Data ONTAP displays target ports in standby cfmode
  • Overview of dual_fabric mode
    • What happens when a link fails with dual_fabric cfmode
    • How Data ONTAP displays target ports in dual_fabric mode
  • Overview of mixed mode
• How to use port sets to make LUNs available on specific FC target ports
  • How port sets work in active/active configurations
  • How upgrades affect port sets and igroups
  • How port sets affect igroup throttles
  • Creating port sets
  • Binding igroups to port sets
  • Unbinding igroups from port sets
  • Adding ports to port sets
  • Removing ports from port sets
  • Destroying port sets
  • Displaying the ports in a port set
  • Displaying igroup-to-port-set bindings
• FC service management
  • Verifying that the FC service is running
  • Verifying that the FC service is licensed
  • Licensing the FC service
  • Disabling the FC license
  • Starting and stopping the FC service
  • Taking target expansion adapters offline and bringing them online
  • Changing the adapter speed
  • Changing the WWPN for a target expansion adapter
  • Changing the system's WWNN
  • WWPN Aliases
    • Creating WWPN aliases
    • Removing WWPN aliases
    • Displaying WWPN alias information
• Managing systems with onboard Fibre Channel adapters
  • Configuring onboard adapters for target mode
    • Re-configuring onboard Fibre Channel adapters
  • Configuring onboard adapters for initiator mode
  • Configuring onboard adapters on the FAS270 for target mode
  • Configuring onboard adapters on the FAS270 for initiator mode
  • Commands for displaying adapter information
    • Displaying the status of onboard FC adapters
    • Displaying information about all adapters
    • Displaying brief target adapter information
    • Displaying detailed target adapter information
    • Displaying the WWNN of a target adapter
    • Displaying HBA information
    • Displaying target adapter statistics
    • Displaying FC traffic information
    • Displaying information about FCP traffic from the partner
    • Displaying how long the FC service has been running
    • Displaying FC service statistics
• Disk space management
• Commands to display disk space information
• Examples of disk space monitoring using the df command
  • Monitoring disk space on volumes with LUNs that do not use Snapshot copies
  • Monitoring disk space on volumes with LUNs that use Snapshot copies
• How Data ONTAP can automatically provide more free space for full volumes
  • Configuring a FlexVol volume to grow automatically
• Configuring automatic free space preservation for a FlexVol volume
• Data protection with Data ONTAP
• Data protection methods
• LUN clones
  • Reasons for cloning LUNs
  • Cloning LUNs
  • Splitting the clone from the backing Snapshot copy
  • Displaying the progress of a clone-splitting operation
  • Stopping the clone-splitting process
  • Deleting Snapshot copies
  • Deleting backing Snapshot copies of deleted LUN clones
    • Examples of deleting backing Snapshot copies of deleted LUN clones
• Deleting busy Snapshot copies
• Restoring a Snapshot copy of a LUN in a volume
• Restoring a single LUN
• Backing up SAN systems to tape
• Using volume copy to copy LUNs