VHD timestamp not updating
Posted on 2011-10-06
We are running MS Virtual Server 2005 R2 (not Hyper-V) with a couple of VMs that have been running for 6 months.
The timestamp on the vhd files haven't changed. Undo disks are turned off.
We are concerned that means all the changes are in memory somewhere and we may lose data if there is a power or hardware failure.
These 2 VMs have vhd set to have 30GB and they are nearly full.
We also have another 2 VMs which have been running a couple of months but disk usage isn't close to the 30GB yet.
These 2 VMs vhd file timestamp do update.
So the question is it because the vhd file isn't being expanded and only the internal data is changed that the timestamp is not being updated?
I can't believe 6 months worth of changes could be cached in memory! So if it isn't written to the vhd or a undo disk file, where is the data going?