I have a 2012R2 server running on EXSi 5.5 that my Appassure 5.4.2 won't backup.
I've started the narrow down process to the fact that the System Reserved Partition is full.
When I try to run VSS on that partition directly I get:
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Failed to create a shadow copy of volume
\?\Volume[dfd67c37-aed4-11e3-80b4-xxxxxxxxxxxx].
Error 0x8004231f: Insufficient storage available to create either the shadow copy storage file or other shadow copy data.
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So I've done my Google-fu and it seems like there is probably an over run of crap laying in the SRP probably from chkdsk running on it.
Of course I can't just open the drive up and see what's going on in there, see if I can delete anything.
I found this article which tells me to use disk manager to give the SRP a drive letter, then do some clean up on (mainly using chkdsk /r and chkdsk...