Unable unmout ESX datastore

I've just been notified about annoying problem by customer for whom I did vSphere 5.5 Design. The datastore was not  posible to unmount. In ESX logs were something similar to message below.

Cannot unmount volume 'Datastore Name: vm3:xxx VMFS uuid: 517c9950-10f30962-931f-00304830a1ea' because file system is busy. Correct the problem and retry the operation.

There is KB about this symptom. VSAN component VSANTRACE was using datastore. That was the reason of busy file system. It was pretty annoying  issue as VSAN was not used nor enabled.

The solution is to disable vsantraced service so it is necessary to issue following command on evey ESX ...

chkconfig vsantraced off 

Not so nice, right? That's the downside of fully integrated VSAN software into general ESX hypervisor. I'm not happy with this approach. In my opinion, it would be much better distribute VSAN as additional software installing as regular VIB (VMware Installable Bundle).

Do you know - MS Excel max file path is 213?

I have just tried open the .xls file in MS Excel 2010 and it failed with message like ...

"File could not be found. Check the spelling of the file name, and verify that the file location is correct."

... and because I've open the file by double click I was pretty sure file exists. BTW Notepad was able to open it. So what's the hell? The only idea what could be wrong was the absolute path length to the file. So I tried what is the maximum file path and I was surprised it is just 213 characters!!!

It's good to know, isn't it?