Archive for December 2008

VMware ESX 3.5 Load Balancing Issues   Leave a comment

Watch out for issues when using load balancing in ESX. We implemented load balancing / teaming using "Route based on IP Hash" which was tricky enough, but we kept seeing duplicate packets to the guests! Turns out if you set link state monitoring to Beacon Probing you get this issue – set it to Link State (which is less desirable but it resolves the problem).

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Posted December 2, 2008 by benryanau in ICT

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Microsoft Virtual Server 2005 R2 – guest disk issues   Leave a comment

Ever had a guest in VS2005 show "The device, \Device\Harddisk0, has a bad block." " Windows – Delayed Write Failed" "{Delayed Write Failed} Windows was unable to save all the data for the file" ?
I’ve run into this a few times. Seems the VS host process must have createfile (RWX/FC?) to the host’s volume/disk where the VHD’s reside (the whole tree up to the VHD files). The account the VM’s run under must have access – I create a group "VM Accounts", add my VM user accounts to it and grant FC to eg D:\ (Folder Only), D:\Server (Folder Only), D:\Server\VHD (Folder Only).
This resolves the issue. Nice work Microsoft.

Posted December 2, 2008 by benryanau in Microsoft

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