VM will not boot after moving using Failover Cluster Manager - "a disk read error occurred......"

Question

My current Configuration:
3 node cluster, using clustered shared storage and about 22 VM's.   The Host servers are running 2012 Data Center while all guest are running 2012 Standard.  The SAN is EqualLogic and we are using HIT Kit 4.5.
I have a CSV that is running out of space, so I created another CSV so that I could move some of the VM's to a new home.    I tested this by creating a test VM, and moved it successfully 3 times.     I then moved an actual
LIVE VM and while it seemed to move ok, it will now not start.   The message is "a disk read error occurred Press ctrl+alt+del to restart".     I moved the test VM and it failed as well.    
I have read several things about this, but nothing seems to relate to my specific issue.   I have verified that VSS is working and free of errors as well.    From the Settings menu for the VM, if I select "Inspect" the drive,
the properties all look fine.    It is a VHDX and both the current file size and maximum disk size seem correct.
The VM's were moved using the "move - virtual machine storage" option within Failover Cluster Manager.
Suggestions?
Thanks.

Answer 1

Lets see if I can answer all of those and I appreciate the brain storming.   This really needs to work, correctly.
1.  The Storage is moving.
2.   VM's and SAN are on same device.
3.  No, my  Clustered Shared Volume, CSV, is out of room, (more one that later)
4.  No, I actually have 2 sans grouped together.   However, I'm moving the VM', form one CSV to another CSV on the Same san.  EqualLogic PS 6110 is the one I am trying to move VMS around on, and the other SAN not involved in any way except
for it is in a SAN group is an EqualLogic PS6010.
5.  No error During move, it took about 5-10 minutes, no error messages.   Note, I did a test and it worked GREAT 3 times.   Now both a live VM, and the test VM are doing the same thing.
6.  No, the machine is not to large.   The test making was a 50 gig drive, just 2012 standard installed with updates.   The live VM was a 75 gig VM that was my Trend Micro Server, or anti-virus host.
7.  Expand the existing SCV?   Yes I should be able to, but there is an issue there.   The volume was expanded correctly, Equallogic sees the added space, Fail Over cluster manager sees the added space, however disk manager only
sort of does.    When looking at disk manager, there are 2 areas that tell you a little bit about the drive.   The top part and then the bottom part.   The top part only shows 500G, the original size, while the bottom part
says that it is 1 TB in size.   I call Dell's technical support and after they looked at it I was told by the technician that they had seen this a couple of times and the only way to fix it was to move all the VM's to another CSV and delete the troubled
CSV.   I thought about adding more space to the troubled CSV, but its on a production server with about 12 VM's running on it and I did not want to take a chance.   The Trend VM was running on CSV-1 and working fine.   
I must admit that the test VM, was on CSV-2.    I moved the Test VM from csv-2 to csv-3 back and forth several times with no errors.   The Trend Server was on CSV-1 and was moved to CSV-3, however it failed.  Again, I then moved
the test VM from CSV-2 to CSV-3 and it failed the same way.   I could not test the "TEST - VM" on csv-1 due to csv-1 not having enough space.
8.   I did disable the network from the VM to see if that mattered it did not. 
9.   I have not yet had a chance to connect the VHDX to a new VM, but I will do that in about an hour, hopefully.    Once I am able to test that suggestion I will post the results as well.
Again, thanks for all the suggestions and comments, as I had rather have lots to look at and try.   I hope I answered them well enough.
Kenny