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