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2013/01/enabling-change-block-tracking-cbt-on #174

Closed lazywinadmin closed 5 years ago

lazywinadmin commented 5 years ago

Enabling Change Block Tracking (CBT) on a Virtual Machine (VMware vSphere 5.1)

https://lazywinadmin.com/2013/01/enabling-change-block-tracking-cbt-on.html

lazywinadmin commented 5 years ago

Anonymous

Posted on: 2013-10-16T01:20:41Z

Thanks ! Very helpful

lazywinadmin commented 5 years ago

François-Xavier Cat (@lazywinadmin)

Posted on: 2013-10-16T01:42:04Z

Thank you! Glad to help someone :-)

lazywinadmin commented 5 years ago

Anonymous

Posted on: 2013-12-05T02:43:15Z

I am looking at having to do a large roll-out of enabling CBT and came across your post. One question... you mention having to enable CBT on each VMDK attached to the VM. However, in your PowerShell script it looks like you are only using one command to turn CBT on. ("$vmConfigSpec.changeTrackingEnabled = $true") Does this automatically enable CBT for ALL VMDK's attached to the VM? Thanks in advance for your response!

lazywinadmin commented 5 years ago

François-Xavier Cat (@lazywinadmin)

Posted on: 2013-12-05T03:11:04Z

Hi!

Thanks for the comment, The post show first how to do it via the GUI then how to do it via PowerCli.
Yes once you do $vmConfigSpec.changeTrackingEnabled = $true it will automatically enable it on all the vmdk.

Once you enabled CBT, your VM will need to go through a stun-unstun cycle (power on, resume after suspend, migrate, or snapshot create/delete/revert) before the reconfiguration takes effect.

Hope this help

lazywinadmin commented 5 years ago

Anonymous

Posted on: 2014-01-23T04:18:58Z

This saved my day! thanks!

lazywinadmin commented 5 years ago

François-Xavier Cat (@lazywinadmin)

Posted on: 2014-01-23T21:25:44Z

Thank you for your comment, happy to help ;-)

lazywinadmin commented 5 years ago

JasonB

Posted on: 2014-05-24T14:35:43Z

I've been running ESX for a long time and have lots of vms that are hardware version 4, sounds like I have to upgrade the hardware level of a bunch of vms before cbt will start working? :(
any tips for upgrading the hardware level of many vms at once?

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lazywinadmin commented 5 years ago

François-Xavier Cat (@lazywinadmin)

Posted on: 2014-06-01T15:58:50Z

Hi Jason,

I had this problem before, this can be automated using Update Manager or PowerCli.

However I had some issues when upgrading version (losing IP configuration etc...) so we kept the process manual.
Note also that this process requires downtime, so we basically did those steps during the windows patching.

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lazywinadmin commented 5 years ago

Edward Bass

Posted on: 2017-03-15T17:44:41Z

Excellent article. Much more useful and easier to read than any of the KB and web articles I looked at so far. Thanks!

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lazywinadmin commented 5 years ago

François-Xavier Cat (@lazywinadmin)

Posted on: 2017-03-15T22:40:48Z

Thanks Edward! Appreciated.

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