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Remembering Daylight Savings

Anybody remember the buzz about Daylight Savings in 2007? Hopefully nobody will have issues this year, but in case someone needs it or just wants to reminisce here are some links from last year:

ESX Server and 2007 daylight savings – VMTN

Here is VMware’s KB on the subject

VMware’s KB article lists the ESX versions that comply with the new DST:

The update has been incorporated into the following product releases:

  • VMware ESX Server 2.0.2 Upgrade Patch 3 (build 33518 or later)
  • VMware ESX Server 2.1.3 Upgrade Patch 3 (build 33524 or later)
  • VMware ESX Server 2.5.3 Upgrade Patch 5 (build 34512 or later)
  • VMware ESX Server 2.5.4 and later (build 32233 or later)
  • VMware ESX Server 3.0.0 and later (build 27701 or later)
  • VMware ESX Server 3.0.1 and later (build 32039 or later)

The KB article also explains how to check your ESX version:

Checking an ESX Server host for installed updates:

ESX Server 2.x patches are cumulative and are referenced by the build number. The current build number is listed in the management interface (MUI), or in the display using VirtualCenter 1.x. Optionally log on to the service console and use the command vmware -v. For example:[root@esxhost]# vmware -v
VMware ESX Server 2.5.1 build-14182

VMTN’s post explains how to verify when your ESX host thinks DST occurs

So how do I determine when DST starts and ends on my box? Seems like a logical question. Try This command…

zdump -v /etc/localtime | grep 2007

You want to see Daylight Savings Time start on March 11 and end on November 4.

As for 2008 – do you have vmtools set to sync with the ESX host for your VMs not on your domain? Are your ESX hosts configured to sync with an NTP server correctly?

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  • Shannon T Alston

    nice article! nice site. you're in my rss feed now ;-)
    keep it up

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