December 4th, 2009 
Kiwi Si 
Thanks to James Pearce for pointing out this VMware forum post from J1mbo who mentions that the ACHI SATA pass-through issue that has been plaguing us HP Proliant ML115 G5 owners since VMware ESX/ESXi v3.5 U3 days has now been resolved with the 4.0 Update 1 (U1) release.
With this release (4.0 U1) guest VMs running on an ML115 ESX/ESXi host should now successfully be able to connect to the hosts local CD/DVD-ROM drive.
I unfortunately haven’t had time to upgrade my home lab to ESXi Update 1 since it’s release so an unable to confirm though am hoping to get some spare time this weekend. 
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My name is Simon Seagrave and I am a London (UK) based Technical Architect. 
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I hadn’t noticed this issue – pass through CD? .iso all the way for VMs
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“pass through CD?”
Cant say that i have had any issues either.
I will ,however, look at upgrading possibly tomorrow.
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What is the best method to upgrade a USB based image of 4.0 to 4.0 U1?
Thanks.
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If it’s ESXi – vSphere Host Update utility, installing it is an option when you install vSphere Client.
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Thanks, I did find this utility after I had already incorrectly updated my USB drive using the ESXi 4.0 U1 install CD (during which I lost all of my settings).
When you are installing the vSphere client, the Host Update utility is a little misleading when it only mentions upgrading from 3.x to 4.0.
Good luck to anyone else upgrading.
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When I try to update my ESXi 4.0 Host with the Host update utility i obtain the next message: “An error has ocurred. Download failed”.
I haven’t proxy. My conection to Internet is direct.
Any ideas about it?
Thanks in advance
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