A UPS failed and a Hyper-V box hosting 6 VMs went down (all Windows Server 2008 R2 x64, if it matters). When I booted back up, it did not automatically perform a chkdsk (which I have seen in the past). I didn't notice whether any of the VMs did chkdsk as they came back up.
In this situation, is it appropriate to:
- Schedule a chkdsk on C:\ of the VM host upon reboot?
- Schedule a chkdsk on C:\ of each of the VMs?
- All of the above?
Or should I only do it when Windows recommends it and does it on its own during bootup? How does windows "know" when it's appropriate to do this?
TL;DR: If a VM Host goes down, do I run chkdsk on it and all the VMs or just let windows do that if it feels it's necessary?
Best Answer
It's appropriate if you feel it is. For an important server, running chkdsk is a good policy. Balance that against the downtime you'll go through.
Microsoft believes it is unnecessary.
Windows Server 2008 no longer performs chkdsk after power failures due to "Self-healing NTFS" and "Transaction NTFS". From the wikipedia articles on Server 2008 and Transactional NTFS: