Please check the folloing things.
1.Communication between master and destination server.
2.backup taken and restoration server same or not
3.destination mount point permission should be 777
#chmod 777 destination MP name
Exchange Writer is not in Satble state
VSSADMIN LIST writers and VSSADMIN LIST providers
You need to fix the Exchange Writers and they should stay in stable state until the Exchange backup completes and if they fail the snapshot processing will f...
Cause : →
a.) I/O error writing to the file system.
b.) A network problem or a problem with the process reading from the socket.
c.) Writing to a full disk partition.
Action :→ Make sure that network devices(NIC) is at “Full duplex.