Our windows 2008 storage server rebooted due to an ntfs error. When it re-started it went into chkdsk. This server has TONS of files so it ran for over an hour. One of its messages was: Inserting an index entry into index $0 of file 25" After it finished the server seemed fine and I was able to access all the files I tested. However this server acted as an iscsi datastore for a vmware esx 4.0 server. I had a 146 gb datastore that contained a vm guest. When the server restarted the all of the datastores on that server were empty! So my guests were gone! I spoke to vmware an all they could come up with was "there was an error on you storage device and we don't know why the files are gone. Another odd piece is that esx reports the datastore as being a total size of 146 gb and an available size of 94 gb. the size difference is the size of the missing files.