Loading

×Sorry to interrupt
CSS Error

Refresh

Cookie Preference Center

General Information on cookies

When you visit our website, we use cookies to ensure that we give you the best experience. This information does not usually directly identify you, but it can give you a more personalized web experience. Because we respect your right to privacy, you can choose not to allow some types of cookies by clicking on the different category headings to find out more and change your settings. However, blocking some types of cookies may impact your experience on the site and the services we are able to offer. Further information can be found in our

Cookie Policy.

Strictly Necessary

Strictly Necessary

Always Active

Strictly Necessary

Strictly necessary cookies are always enabled since they are essential for our website to function. They enable core functionality such as security, network management, and website accessibility. You can set your browser to block or alert you about these cookies, but this may affect how the website functions. For more information please visit www.aboutcookies.org or www.allaboutcookies.org.

Cookie Details‎

Performance

Performance

Performance

Performance cookies are used to analyze the user experience to improve our website by collecting and reporting information on how you use it. They allow us to know which pages are the most and least popular, see how visitors move around the site, optimize our website and make it easier to navigate.

Cookie Details‎

Please confirm your settings by refreshing the page.

Functional

Functional

Functional

Functional cookies help us keep track of your past browsing choices so we can improve usability and customize your experience. These cookies enable the website to remember your preferred settings, language preferences, location and other customizable elements such as font or text size. If you do not allow these cookies, then some or all of these services may not function properly.

Cookie Details‎

Advertising

Advertising

Advertising

Advertising cookies are used to send you relevant advertising and promotional information. They may be set through our site by third parties to build a profile of your interests and show you relevant advertisements on other sites. These cookies do not directly store personal information, but their function is based on uniquely identifying your browser and internet device.

Cookie Details‎

Advertising Cookies

Consent Leg.Interest

Select All Vendors

Select All Vendors

Select All Hosts

Select All

Clear Filters

Information storage and access

Apply

Confirm My Choices Reject All Allow All

My Subscriptions

Loading

Knowledge Base

Powering on the virtual machine fails with the error: Thin/TBZ disks cannot be opened in multiwriter mode (1033570)

Last Updated: 3/21/2024Categories: TroubleshootingTotal Views: 91835Language:
English

3 like this article

Subscribe to get an email
newsletter with new updates

3 people found this helpful Please provide article feedback:

Symptoms

Powering on the virtual machine fails.

You see the error:

Reason: Thin/TBZ disks cannot be opened in multiwriter mode..
Cannot open the disk '/vmfs/volumes/4c549ecd-66066010-e610-002354a2261b/Windows Server 2008/Windows Server 2008.vmdk' or one of the snapshot disks it depends on.
VMware ESX cannot open the virtual disk, "/vmfs/volumes/4c549ecd-66066010-e610-002354a2261b/Windows Server 2008/Windows Server 2008.vmdk" for clustering. Please verify that the virtual disk was created using the 'thick' option.

Cannot open Thin/TBZ disks in a multiwriter mode.

VMware ESX cannot open the virtual disk.

Cause

This issue occurs if the disk is not in a compatible format for multiwriter mode.

This issue most commonly occurs in configurations where an eagerzeroedthick virtual disk is shared across multiple virtual machines and is extended using the vSphere Client. When the disk is extended using the vSphere Client, it becomes lazyzeroedthick as the extended portion of the disk is LazyZeroed.

For more information, see Attempts to extend the size of an EagerZeroedThick VMDK from the vSphere Client might result in a LazyZeroedThick VMDK (2054563).

Resolution

This is an expected behavior, where the format of a virtual disk in multiwriter mode is changed to an unsupported format. For more information about the requirements of virtual disks in multiwriter mode, see Enabling or disabling simultaneous write protection provided by VMFS using the multi-writer flag (1034165).

To confirm the issue, verify the virtual disk format. To check the disk format, see Determining if a VMDK is zeroedthick or eagerzeroedthick (1011170).

To prevent this issue from re-occurring, ensure that virtual disks in multiwriter configurations are not converted to the lazyzeroedthick format. To use disks in multiwriter mode, the format must be Thick Provision Eager Zeroed.

To work around this issue if you need to extend a virtual disk in a multiwriter configuration, extend the virtual disk by running the vmkfstools -X command from the ESXi/ESX host command line (this is vSphere Client default behavior). This ensures that the virtual disk format stays in the correct eagerzeroedthick format.

For example, to extend the size of the virtual disk to 60 GB:

# vmkfstools -X 60G -d eagerzeroedthick /vmfs/volumes/Datastore_name/virtual_Machine_folder/virtualmachinedisk.vmdk

Notes:

In the preceding vmkfstools -X example, 60 GB is the size that you want the disk file to be, is not the size by which you want to extend the disk file.

VMware recommends that you perform this operation outside of production, as it writes to the disk and takes significant time to complete.

If the disk is already extended, you can use Storage vMotion to change the disk format. For more information, see the Migrate a Virtual Machine to New Storage section in the vCenter Server and Host Management guide.

For virtual machines that are running Microsoft Cluster Service (MSCS), ensure the disks containing the guest Operating System is not connected to a SCSI controller that is engaged in bus-sharing.

Related Information

For more information about increasing the size of virtual disks, see Increasing the size of a virtual disk (1004047).

For more information about virtual disks in clustering configurations, see:

Enabling clustering features for an existing virtual disk by converting in place (1035823)

Enabling clustering features for an existing virtual disk by converting while copying (1003491)

Enabling clustering features for an existing virtual disk by converting while copying
Increasing the size of a virtual disk
Determining if a VMDK is zeroedthick or eagerzeroedthick
Enabling or disabling simultaneous write protection provided by VMFS using the multi-writer flag
Enabling clustering features for an existing virtual disk by converting in place
Falha de inicialização da máquina virtual com o erro: Discos dinâmicos/TBZ não podem ser abertos no modo multiwriter. O VMware ESX não abre o disco virtual para clustering
El encendido de una máquina virtual falla y aparece el error: Los discos finos/TBZ no pueden abrirse en el modo de escritura múltiple. VMware ESX no puede abrir el disco virtual para el agrupamiento
Attempts to extend the size of an EagerZeroedThick VMDK from the vSphere Client might result in a LazyZeroedThick VMDK
无法打开虚拟机电源，并出现错误：无法在多写入器模式下打开精简/TBZ 磁盘。VMware ESX 无法打开用于群集的虚拟磁盘
仮想マシンが次のエラーでパワーオンに失敗する： Thin/TBZ disks cannot be opened in multiwriter mode. VMware ESX cannot open the virtual disk for clustering. (1033570)） VMware ESX cannot open the virtual disk for clustering

Detectable by VMware SkylineTM

Actions

Copy

link to clipboard
copied!

Print

Language:
English

Attachments

Additional Resources

KB
•
End Of General Availability of the Free vSphere Hypervisor (ESXi 7.x and 8.x) (2107518)

Result 1 of 1

Ask The Community

Get answers quickly from VMware experts in the community

Post Subject

CONTINUE IN COMMUNITIES

Related Products:

VMware vSphere ESXi

VMware vCenter Server

VMware ESX Server

Related Versions:

VMware vSphere ESXi 6.7

VMware vSphere ESXi 6.5

VMware vSphere ESXi 6.0

VMware vSphere ESXi 5.5

VMware vSphere ESXi 5.1

VMware vSphere ESXi 5.0

VMware vCenter Server 6.7.x

VMware vCenter Server 6.5.x

VMware vCenter Server 6.0.x

VMware vCenter Server 5.5.x

VMware vCenter Server 5.1.x

VMware vCenter Server 5.0.x

VMware vCenter Server 4.1.x

VMware vCenter Server 4.0.x

VMware ESX 4.1.x

VMware ESX 4.0.x

view all

Take Our Survey

Support Assistant