I haven't seen an upgrade/update policy yet but normally VMware will provide the necessary updates to make sure they are compliant with our software and will not break it.
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I've taken the liberty to patch the Operating System of the Data Recovery appliance from CentOS 5.2 to the latest 5.3 with Kernel 2.6.18-128.1.10 using simply the yum update command. I uninstalled the vmware-tools rpm, added the new one.
I then had to create two links for libssl and libcrypto as thelibraries have been updated, and the vmware-config-tools.pl could not run, without those libraries.
ln -s libssl.so.0.9.8e libssl.so.0.9.8
ln -s libcrypto.so.0.9.8e libcrypto.so.0.9.8
My VMware-tools are now up-to-date.
But, this now means I have a DataRecovery appliance that is not the same as what VMware supplies, and I know that I would not be able toopen a SR ticket if I had any issues. It's something I'm willing toaccept for making sure my appliance is secure and has up-to-date VMwaretools.