vSphere Storage - ESXi 5.1 - Documentation - VMware

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vSphere Storage Changing iSCSI Boot Parameters Causes ESXi to Boot in Stateless Mode Changing iSCSI boot parameters on the network adapter after the first boot does not update the iSCSI and networking configuration on the ESXi host. Problem If you change the iSCSI boot parameters on the network adapter after the first ESXi boot from iSCSI, the host will boot in a stateless mode. Cause The firmware uses the updated boot configuration and is able to connect to the iSCSI target and load the ESXi image. However, when loaded, the system does not pick up the new parameters, but continues to use persistent networking and iSCSI parameters from the previous boot. As a result, the host cannot connect to the target and boots in the stateless mode. Solution 1 Use the vSphere Web Client to connect to the ESXi host. 2 Re-configure the iSCSI and networking on the host to match the iBFT parameters. 3 Perform a rescan. 126 VMware, Inc.
Best Practices for iSCSI Storage 14 When using ESXi with the iSCSI SAN, follow best practices that VMware offers to avoid problems. Check with your storage representative if your storage system supports Storage API - Array Integration hardware acceleration features. If it does, refer to your vendor documentation for information on how to enable hardware acceleration support on the storage system side. For more information, see Chapter 21, “Storage Hardware Acceleration,” on page 215. This chapter includes the following topics: n “Preventing iSCSI SAN Problems,” on page 127 n “Optimizing iSCSI SAN Storage Performance,” on page 128 n “Checking Ethernet Switch Statistics,” on page 131 n “iSCSI SAN Configuration Checklist,” on page 131 Preventing iSCSI SAN Problems When using ESXi in conjunction with a SAN, you must follow specific guidelines to avoid SAN problems. You should observe these tips for avoiding problems with your SAN configuration: n Place only one VMFS datastore on each LUN. Multiple VMFS datastores on one LUN is not recommended. n Do not change the path policy the system sets for you unless you understand the implications of making such a change. n Document everything. Include information about configuration, access control, storage, switch, server and iSCSI HBA configuration, software and firmware versions, and storage cable plan. n Plan for failure: n Make several copies of your topology maps. For each element, consider what happens to your SAN if the element fails. n Cross off different links, switches, HBAs and other elements to ensure you did not miss a critical failure point in your design. n Ensure that the iSCSI HBAs are installed in the correct slots in the ESXi host, based on slot and bus speed. Balance PCI bus load among the available busses in the server. n Become familiar with the various monitor points in your storage network, at all visibility points, including ESXi performance charts, Ethernet switch statistics, and storage performance statistics. n Be cautious when changing IDs of the LUNs that have VMFS datastores being used by your host. If you change the ID, virtual machines running on the VMFS datastore will fail. VMware, Inc. 127
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vSphere Storage ESXi 5.1 vCenter Se
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Contents About vSphere Storage 9 Up
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Configuring Discovery Addresses for
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22 Storage Thin Provisioning 225 St
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About vSphere Storage vSphere Stora
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Updated Information This vSphere St
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Introduction to Storage 1 This intr
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Networked Storage Networked storage
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Network-attached Storage (NAS) Stor
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Table 1-1. Storage Device Informati
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Table 1-2. Storage Adapter Informat
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Display Datastore Information in th
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Figure 1-6. Virtual machines access
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Overview of Using ESXi with a SAN 2
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ESXi Hosts and Multiple Storage Arr
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Not all applications need to be on
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n Overall impact on SAN environment
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Using ESXi with Fibre Channel SAN 3
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With ESXi hosts, use a single-initi
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Configuring Fibre Channel Storage 4
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2 Check that all SAN components mee
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3 Click VM Options. 4 Click the Fib
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Configuring Fibre Channel over 5 Et
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6 Select the network adapter (vmnic
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6 Click OK. The software FCoE adapt
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Modifying Fibre Channel Storage for
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n To use boot from SAN, make sure t
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3 Execute these commands for SPB to
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Booting ESXi from Fibre Channel SAN
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2 Configure the storage array. a Fr
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g Select 1. WWPN. (Boot this device
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Booting ESXi with Software FCoE 8 E
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Install and Boot ESXi from Software
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Best Practices for Fibre Channel 9
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Storage Array Performance Storage a
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Using ESXi with iSCSI SAN 10 You ca
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The 16-hexadecimal digits are text
Page 75 and 76: Discovery A discovery session is pa
Page 77 and 78: Configuring iSCSI Adapters and 11 S
Page 79 and 80: For active-passive storage arrays n
Page 81 and 82: Change Name and IP Address for Inde
Page 83 and 84: n Broadcom iSCSI adapters do not su
Page 85 and 86: The software iSCSI adapter configur
Page 87 and 88: Procedure 1 Browse to the host in t
Page 89 and 90: Figure 11-2. 1:1 adapter mapping on
Page 91 and 92: You created the virtual VMkernel ad
Page 93 and 94: 5 Click Add and select a VMkernel a
Page 95 and 96: 5 Create iSCSI VMkernel adapters fo
Page 97 and 98: Managing iSCSI Network Special cons
Page 99 and 100: Enable Jumbo Frames for Independent
Page 101 and 102: Procedure 1 Log in to the vSphere C
Page 103 and 104: Table 11-4. CHAP Security Level (Co
Page 105 and 106: 2 Under Adapter Details, click the
Page 107 and 108: 3 From the list of available target
Page 109 and 110: Table 11-5. Additional Parameters f
Page 111 and 112: Procedure u To list iSCSI sessions,
Page 113 and 114: Modifying iSCSI Storage Systems for
Page 115 and 116: n Certain EMC CLARiiON CX3 models m
Page 117 and 118: NetApp Storage Systems For NetApp s
Page 119 and 120: Booting from iSCSI SAN 13 When you
Page 121 and 122: 4 Select the I/O port to configure.
Page 123 and 124: 2 Change Boot Sequence in BIOS on p
Page 125: Isolated iSCSI and Management Netwo
Page 129 and 130: Because each application has differ
Page 131 and 132: Generally, applications or systems
Page 133 and 134: Managing Storage Devices 15 Manage
Page 135 and 136: Storage Refresh and Rescan Operatio
Page 137 and 138: Change the Number of Scanned LUNs B
Page 139 and 140: It is possible for a device to retu
Page 141 and 142: To avoid these problems, your host
Page 143 and 144: PDL Conditions and High Availabilit
Page 145 and 146: Solid State Disks Enablement 16 In
Page 147 and 148: 4 Unclaim the device. u You can unc
Page 149 and 150: 6 Check the device status by runnin
Page 151 and 152: Best Practices for SSD Devices Foll
Page 153 and 154: Working with Datastores 17 Datastor
Page 155 and 156: n Scalability improvements on stora
Page 157 and 158: n Creating a template n Deploying a
Page 159 and 160: In an L3 environment the following
Page 161 and 162: The datastore on the SCSI-based sto
Page 163 and 164: Procedure 1 Log in to the vSphere C
Page 165 and 166: When you perform datastore resignat
Page 167 and 168: 2 Click the Configuration tab and c
Page 169 and 170: Option Description Use free space D
Page 171 and 172: 3 In the Inventory panel, choose Da
Page 173 and 174: Turn off Storage Filters When you p
Page 175 and 176: Set Up Dynamic Disk Mirroring Typic
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4 Click Next. 5 Select the device t
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Raw Device Mapping 18 Raw device ma
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Snapshots Makes it possible to use
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n You cannot convert larger than 2T
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9 In the Ready to Complete New Virt
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Manage Paths for a Mapped LUN in th
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VMkernel and Storage 19 The VMkerne
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Chapter 19 VMkernel and Storage n A
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Understanding Multipathing and 20 F
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Figure 20-2. Host-Based Path Failov
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Figure 20-4. Port Reassignment 10.0
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Figure 20-5. Pluggable Storage Arch
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6 The SATP interprets the I/O comma
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3 Click Devices under View. 4 Selec
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2 In the Paths panel, right-click t
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This example indicates the followin
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Procedure 1 To define a new claim r
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Mask Paths You can prevent the host
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Procedure 1 To add a claim rule for
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Storage Hardware Acceleration 21 Th
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On your host, the hardware accelera
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Procedure u Run the esxcli --server
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3 Load both claim rules by running
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Uninstall NAS Plug-Ins To uninstall
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Storage Thin Provisioning 22 With E
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You can use Storage vMotion or cros
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3 Click the Hardware tab and select
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Requirements To use the thin provis
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Procedure Chapter 22 Storage Thin P
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Using Storage Vendor Providers 23 W
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n Alarms indicate a change in stora
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3 In the Storage Providers list, vi
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Virtual Machine Storage Profiles 24
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View Existing Storage Capabilities
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Assign User-Defined Storage Capabil
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Remove a Storage Capability in the
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Create a Virtual Machine Storage Pr
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Procedure 1 Open the Profiles tab o
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Monitor Storage Compliance for Virt
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Using vmkfstools 25 vmkfstools is o
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File System Options File system opt
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When upgrading the datastore, use t
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Renaming a Virtual Disk This option
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Listing Attributes of an RDM This o
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Index Symbols * next to path 201 A
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G GPT 18 H hardware acceleration ab
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limitations 42 requirements 41 O on
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EMC CLARiiON 52, 114 EMC Symmetrix
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vSphere Storage - ESXi 5.1 - Documentation - VMware

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