vSphere Storage - ESXi 5.1 - Documentation - VMware

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vSphere Storage You specify the newSize parameter in kilobytes, megabytes, or gigabytes by adding a k (kilobytes), m (megabytes), or g (gigabytes) suffix. The unit type is not case sensitive. vmkfstools interprets either k or K to mean kilobytes. If you don’t specify a unit type, vmkfstools defaults to kilobytes. The newSize parameter defines the entire new size, not just the increment you add to the disk. For example, to extend a 4g virtual disk by 1g, enter: vmkfstools -X 5g disk name. You can extend the virtual disk to the eagerzeroedthick format by using the -d eagerzeroedthick option. NOTE Do not extend the base disk of a virtual machine that has snapshots associated with it. If you do, you can no longer commit the snapshot or revert the base disk to its original size. Upgrading Virtual Disks This option converts the specified virtual disk file from ESX Server 2 format to the ESXi format. -M --migratevirtualdisk Creating a Virtual Compatibility Mode Raw Device Mapping This option creates a Raw Device Mapping (RDM) file on a VMFS volume and maps a raw LUN to this file. After this mapping is established, you can access the LUN as you would a normal VMFS virtual disk. The file length of the mapping is the same as the size of the raw LUN it points to. -r --createrdm device When specifying the device parameter, use the following format: /vmfs/devices/disks/disk_ID:P Example for Creating a Virtual Compatibility Mode RDM In this example, you create an RDM file named my_rdm.vmdk and map the disk_ID raw disk to that file. vmkfstools -r /vmfs/devices/disks/disk_ID my_rdm.vmdk You can configure a virtual machine to use the my_rdm.vmdk mapping file by adding the following lines to the virtual machine configuration file: scsi0:0.present = TRUE scsi0:0.fileName = /vmfs/volumes/myVMFS/my_rdm.vmdk Creating a Physical Compatibility Mode Raw Device Mapping This option lets you map a pass-through raw device to a file on a VMFS volume. This mapping lets a virtual machine bypass ESXi SCSI command filtering when accessing its virtual disk.This type of mapping is useful when the virtual machine needs to send proprietary SCSI commands, for example, when SAN-aware software runs on the virtual machine. -z --createrdmpassthru device After you establish this type of mapping, you can use it to access the raw disk just as you would any other VMFS virtual disk. When specifying the device parameter, use the following format: /vmfs/devices/disks/disk_ID 262 VMware, Inc.
Listing Attributes of an RDM This option lets you list the attributes of a raw disk mapping. -q --queryrdm This option prints the name of the raw disk RDM. The option also prints other identification information, like the disk ID, for the raw disk. Displaying Virtual Disk Geometry This option gets information about the geometry of a virtual disk. -g --geometry The output is in the form: Geometry information C/H/S, where C represents the number of cylinders, H represents the number of heads, and S represents the number of sectors. NOTE When you import virtual disks from hosted VMware products to the ESXi host, you might see a disk geometry mismatch error message. A disk geometry mismatch might also be the cause of problems loading a guest operating system or running a newly-created virtual machine. Checking and Repairing Virtual Disks Use this option to check or repair a virtual disk in case of an unclean shutdown. -x , --fix [check|repair] Checking Disk Chain for Consistency With this option, you can check the entire disk chain. You can determine if any of the links in the chain are corrupted or any invalid parent-child relationships exist. -e --chainConsistent Storage Device Options Device options allows you to perform administrative task for physical storage devices. Managing SCSI Reservations of LUNs The -L option lets you reserve a SCSI LUN for exclusive use by the ESXi host, release a reservation so that other hosts can access the LUN, and reset a reservation, forcing all reservations from the target to be released. -L --lock [reserve|release|lunreset|targetreset|busreset] device CAUTION Using the -L option can interrupt the operations of other servers on a SAN. Use the -L option only when troubleshooting clustering setups. Unless specifically advised by VMware, never use this option on a LUN hosting a VMFS volume. You can specify the -L option in several ways: Chapter 25 Using vmkfstools n -L reserve – Reserves the specified LUN. After the reservation, only the server that reserved that LUN can access it. If other servers attempt to access that LUN, a reservation error results. n -L release – Releases the reservation on the specified LUN. Other servers can access the LUN again. n -L lunreset – Resets the specified LUN by clearing any reservation on the LUN and making the LUN available to all servers again. The reset does not affect any of the other LUNs on the device. If another LUN on the device is reserved, it remains reserved. VMware, Inc. 263
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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
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Discovery A discovery session is pa
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Configuring iSCSI Adapters and 11 S
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For active-passive storage arrays n
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Change Name and IP Address for Inde
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n Broadcom iSCSI adapters do not su
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The software iSCSI adapter configur
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Procedure 1 Browse to the host in t
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Figure 11-2. 1:1 adapter mapping on
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You created the virtual VMkernel ad
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5 Click Add and select a VMkernel a
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5 Create iSCSI VMkernel adapters fo
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Managing iSCSI Network Special cons
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Enable Jumbo Frames for Independent
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Procedure 1 Log in to the vSphere C
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Table 11-4. CHAP Security Level (Co
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2 Under Adapter Details, click the
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3 From the list of available target
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Table 11-5. Additional Parameters f
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Procedure u To list iSCSI sessions,
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Modifying iSCSI Storage Systems for
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n Certain EMC CLARiiON CX3 models m
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NetApp Storage Systems For NetApp s
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Booting from iSCSI SAN 13 When you
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4 Select the I/O port to configure.
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2 Change Boot Sequence in BIOS on p
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Isolated iSCSI and Management Netwo
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Best Practices for iSCSI Storage 14
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Because each application has differ
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Generally, applications or systems
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Managing Storage Devices 15 Manage
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Storage Refresh and Rescan Operatio
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Change the Number of Scanned LUNs B
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It is possible for a device to retu
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To avoid these problems, your host
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PDL Conditions and High Availabilit
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Solid State Disks Enablement 16 In
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4 Unclaim the device. u You can unc
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6 Check the device status by runnin
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Best Practices for SSD Devices Foll
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Working with Datastores 17 Datastor
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n Scalability improvements on stora
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n Creating a template n Deploying a
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In an L3 environment the following
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The datastore on the SCSI-based sto
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Procedure 1 Log in to the vSphere C
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When you perform datastore resignat
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2 Click the Configuration tab and c
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Option Description Use free space D
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3 In the Inventory panel, choose Da
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Turn off Storage Filters When you p
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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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Page 221 and 222: 3 Load both claim rules by running
Page 223 and 224: Uninstall NAS Plug-Ins To uninstall
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Page 231 and 232: Requirements To use the thin provis
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Page 235 and 236: Using Storage Vendor Providers 23 W
Page 237 and 238: n Alarms indicate a change in stora
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Page 241 and 242: Virtual Machine Storage Profiles 24
Page 243 and 244: View Existing Storage Capabilities
Page 245 and 246: Assign User-Defined Storage Capabil
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Page 249 and 250: Create a Virtual Machine Storage Pr
Page 251 and 252: Procedure 1 Open the Profiles tab o
Page 253 and 254: Monitor Storage Compliance for Virt
Page 255 and 256: Using vmkfstools 25 vmkfstools is o
Page 257 and 258: File System Options File system opt
Page 259 and 260: When upgrading the datastore, use t
Page 261: Renaming a Virtual Disk This option
Page 265 and 266: Index Symbols * next to path 201 A
Page 267 and 268: G GPT 18 H hardware acceleration ab
Page 269 and 270: limitations 42 requirements 41 O on
Page 271 and 272: EMC CLARiiON 52, 114 EMC Symmetrix
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vSphere Storage - ESXi 5.1 - Documentation - VMware

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