Education Edition VMware image is supplied in so called thin format. This means that the used disk size (and image size as well) will expand dynamically with the growth of data and only when needed. This works quite well with VMware vSphere Hypervisor versions 4 and 5, but can present difficulties with version 6 of the software.
When you try to use the downloaded image with VMware vSphere Hypervisor version 6, you might see the LZMA data is corrupt or system halted error messages. The following error is also likely to appear:
The operation on file "/vmfs/devices/deltadisks/ONLYOFFICE_EducationServer_Linux.8.9.2.vmdk" failed. If the file resides on a remote file system, make sure that the network connection and the server where this disk resides are functioning properly. If the file resides on removable media, reattach the media. Select Retry to attempt the operation again. Select Cancel to end this session. Select Continue to forward the error to the guest operating system.
To prevent that you must convert Education Edition virtual machine image into the thick format (with fixed disk size) prior to using it with VMware vSphere Hypervisor version 6. Run the following command on it:
vmkfstools -i ONLYOFFICE_EducationServer_Linux.8.9.2.vmdk -d eagerzeroedthick ONLYOFFICE_EducationServer_Linux.8.9.2.thick.vmdk
This operation might take quite a long time due to the large image size. Please wait for the conversion to finish and do not interrupt it as it can damage both the thin and thick format images.
If you decide afterwards that you do not need the thick image and would like to convert it back to thin format, use the following command:
vmkfstools -i ONLYOFFICE_EducationServer_Linux.8.9.2.thick.vmdk -d thin ONLYOFFICE_EducationServer_Linux.8.9.2.thin.vmdk