Error after expending virtual disk in hyper v

I ran out of space on a virtual disk  for my exchange server so i expanded the size of the disk in hyper v and now the virtual server will not boot it gives the error:
 The chain of virtual disks is corrupted.  There is a is match in the virtual sizes of the parent virtual hard disk and differencing disk.

My VM is running exchange and has 2 virtual disks, one for the OS and one for exchange 2010.  I accidentally expanded the vhd (the parent disk) and then did the second one.  Now I get the above errors.  I do  not have a snapshot of the server or a backup.

Please help!
Mitch
nsca_mitchAsked:
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msmamjiConnect With a Mentor Commented:
From What I understand the OS disk is a differencing disk of some disk. You (accidently) expanded this disk, however, you were suppose to expand the other disk holding the exchange files. To be frank here, you cannot modify the parent partition and expect the children to be changed too.  

It is recommended that you write-protect or lock the parent disk before using the differencing disk. Otherwise, if the parent disk is modified by some other process, all differencing disks related to it become invalid, and all data written to the differencing disks is lost.

I haven't tried this myself but try to merge the differencing vhd file (using edit disk in hyper-v manager) with the parent disk. I highly doubt that this would work as you also tried booting from this disk.

Regards,
Shahid

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