6.5.1
Table Of Contents
- vSphere Storage
- Contents
- About vSphere Storage
- Updated Information
- Introduction to Storage
- Getting Started with a Traditional Storage Model
- Overview of Using ESXi with a SAN
- Using ESXi with Fibre Channel SAN
- Configuring Fibre Channel Storage
- Configuring Fibre Channel over Ethernet
- Booting ESXi from Fibre Channel SAN
- Booting ESXi with Software FCoE
- Best Practices for Fibre Channel Storage
- Using ESXi with iSCSI SAN
- Configuring iSCSI Adapters and Storage
- ESXi iSCSI SAN Requirements
- ESXi iSCSI SAN Restrictions
- Setting LUN Allocations for iSCSI
- Network Configuration and Authentication
- Set Up Independent Hardware iSCSI Adapters
- About Dependent Hardware iSCSI Adapters
- About the Software iSCSI Adapter
- Modify General Properties for iSCSI Adapters
- Setting Up iSCSI Network
- Using Jumbo Frames with iSCSI
- Configuring Discovery Addresses for iSCSI Adapters
- Configuring CHAP Parameters for iSCSI Adapters
- Configuring Advanced Parameters for iSCSI
- iSCSI Session Management
- Booting from iSCSI SAN
- Best Practices for iSCSI Storage
- Managing Storage Devices
- Storage Device Characteristics
- Understanding Storage Device Naming
- Storage Rescan Operations
- Identifying Device Connectivity Problems
- Edit Configuration File Parameters
- Enable or Disable the Locator LED on Storage Devices
- Erase Storage Devices
- Working with Flash Devices
- About VMware vSphere Flash Read Cache
- Working with Datastores
- Types of Datastores
- Understanding VMFS Datastores
- Understanding Network File System Datastores
- Creating Datastores
- Managing Duplicate VMFS Datastores
- Increasing VMFS Datastore Capacity
- Administrative Operations for Datastores
- Set Up Dynamic Disk Mirroring
- Collecting Diagnostic Information for ESXi Hosts on a Storage Device
- Checking Metadata Consistency with VOMA
- Configuring VMFS Pointer Block Cache
- Understanding Multipathing and Failover
- Raw Device Mapping
- Software-Defined Storage and Storage Policy Based Management
- About Storage Policy Based Management
- Virtual Machine Storage Policies
- Working with Virtual Machine Storage Policies
- Populating the VM Storage Policies Interface
- Default Storage Policies
- Creating and Managing VM Storage Policies
- Storage Policies and Virtual Machines
- Assign Storage Policies to Virtual Machines
- Change Storage Policy Assignment for Virtual Machine Files and Disks
- Monitor Storage Compliance for Virtual Machines
- Check Compliance for a VM Storage Policy
- Find Compatible Storage Resource for Noncompliant Virtual Machine
- Reapply Virtual Machine Storage Policy
- Using Storage Providers
- Working with Virtual Volumes
- About Virtual Volumes
- Virtual Volumes Concepts
- Virtual Volumes and Storage Protocols
- Virtual Volumes Architecture
- Virtual Volumes and VMware Certificate Authority
- Snapshots and Virtual Volumes
- Before You Enable Virtual Volumes
- Configure Virtual Volumes
- Provision Virtual Machines on Virtual Volumes Datastores
- Virtual Volumes and Replication
- Best Practices for Working with vSphere Virtual Volumes
- Filtering Virtual Machine I/O
- Storage Hardware Acceleration
- Hardware Acceleration Benefits
- Hardware Acceleration Requirements
- Hardware Acceleration Support Status
- Hardware Acceleration for Block Storage Devices
- Hardware Acceleration on NAS Devices
- Hardware Acceleration Considerations
- Thin Provisioning and Space Reclamation
- Using vmkfstools
- vmkfstools Command Syntax
- The vmkfstools Command Options
- -v Suboption
- File System Options
- Virtual Disk Options
- Supported Disk Formats
- Creating a Virtual Disk
- Initializing a Virtual Disk
- Inflating a Thin Virtual Disk
- Converting a Zeroedthick Virtual Disk to an Eagerzeroedthick Disk
- Removing Zeroed Blocks
- Deleting a Virtual Disk
- Renaming a Virtual Disk
- Cloning or Converting a Virtual Disk or RDM
- Extending a Virtual Disk
- Upgrading Virtual Disks
- Creating a Virtual Compatibility Mode Raw Device Mapping
- Creating a Physical Compatibility Mode Raw Device Mapping
- Listing Attributes of an RDM
- Displaying Virtual Disk Geometry
- Checking and Repairing Virtual Disks
- Checking Disk Chain for Consistency
- Storage Device Options
Configuring Advanced Parameters for iSCSI
You might need to configure additional parameters for your iSCSI initiators. For example, some iSCSI
storage systems require ARP (Address Resolution Protocol) redirection to move iSCSI traffic dynamically
from one port to another. In this case, you must activate the ARP redirection on your host.
The following table lists advanced iSCSI parameters that you can configure using the
vSphere Web Client. In addition, you can use the vSphere CLI commands to configure some of the
advanced parameters. For information, see the Getting Started with vSphere Command-Line Interfaces
documentation.
Important Do not change the advanced iSCSI settings unless VMware support or Storage Vendors
direct you to change them.
Table 11‑5. Additional Parameters for iSCSI Initiators
Advanced Parameter Description Configurable On
Header Digest Increases data integrity. When the header digest parameter is enabled,
the system performs a checksum over each header part of the iSCSI
Protocol Data Unit (PDU). The system verifies the data using the
CRC32C algorithm.
Software iSCSI
Dependent Hardware
iSCSI
Data Digest Increases data integrity. When the data digest parameter is enabled, the
system performs a checksum over each PDU data part. The system
verifies the data using the CRC32C algorithm.
Note Systems that use the Intel Nehalem processors offload the iSCSI
digest calculations for software iSCSI. This offload helps to reduce the
impact on performance.
Software iSCSI
Dependent Hardware
iSCSI
Maximum Outstanding
R2T
Defines the R2T (Ready to Transfer) PDUs that can be in transition before
an acknowledge PDU is received.
Software iSCSI
Dependent Hardware
iSCSI
First Burst Length Specifies the maximum amount of unsolicited data an iSCSI initiator can
send to the target during the execution of a single SCSI command, in
bytes.
Software iSCSI
Dependent Hardware
iSCSI
Maximum Burst Length Maximum SCSI data payload in a Data-In or a solicited Data-Out iSCSI
sequence, in bytes.
Software iSCSI
Dependent Hardware
iSCSI
Maximum Receive Data
Segment Length
Maximum data segment length, in bytes, that can be received in an iSCSI
PDU.
Software iSCSI
Dependent Hardware
iSCSI
Session Recovery
Timeout
Specifies the amount of time, in seconds, that can lapse while a session
recovery is performed. If the timeout exceeds its limit, the iSCSI initiator
ends the session.
Software iSCSI
Dependent Hardware
iSCSI
No-Op Interval Specifies the time interval, in seconds, between NOP-Out requests sent
from your iSCSI initiator to an iSCSI target. The NOP-Out requests serve
as the ping mechanism to verify that a connection between the iSCSI
initiator and the iSCSI target is active.
Software iSCSI
Dependent Hardware
iSCSI
vSphere Storage
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