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. 
Related posts:
- VMware ESX – “Upgrading ESX 4.0 to 4.0 Update 1 on HP Proliant systems can fail or time out and leave the host in an unusable state if the host has HP Insight Management Agents running” With many of you upgrading to the recently released ESX...
- VMware ESX 4.0 and vCenter 4.0 Update 1 (U1) Released ! It’s here! The much anticipated first major update (U1) to...
- HP Proliant Server Firmware Update CD – Help keep your server running smoothly How many of your HP Proliant servers do you re-commission...
Posted in 
My name is Simon Seagrave and I am a London (UK) based Senior Technology Consultant and vSpecialist working for EMC. 
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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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Hi,
I have ML115 G5 but cannot get DVDROM passthru to VM’s to work. Nott seen
by ESXi host. Tried ESXi4.0 and ESXi 4.1 to no avail. Ideas anyone?
Thanks
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I’m having exactly the same problem. When I saw the post I updated to v4.1, that didn’t work, reinstalled with v4.0 U1, that doesn’t work. Tried adding an additional DVD sata, no luck with this either.
Any help would be much appreciated.
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