Exchange 2013 Cluster Backup Error (One node)

Hi

I'm getting the following error from one of the nodes of my exchange 2013 cluster on the management console when trying to run the daily transactional log backup.

I have recently updated to the new build (39029)

I have checked and both the exchange servers and acronis storage\management server have sufficient space available on the local storage and vault

Command 'Backing up' has failed.
Additional info:
--------------------
Error code: 61
Module: 309
LineInfo: 4a8728dc8a1c950f
Fields: $module : service_process_vs_39029
Message: Command 'Backing up' has failed.
--------------------
Error code: 1602
Module: 91
LineInfo: 9d08bc3c61bce3e5
Fields: IsReturnCode : 1, $module : arx_agent_fork_vs_39029
Message: A generic error of Microsoft Exchange Backuper.
--------------------
Error code: 17
Module: 91
LineInfo: 7edade4ed07d52dd
Fields: IsReturnCode : 1, $module : arx_agent_fork_vs_39029
Message: Failed to back up the information store.
--------------------
Error code: 284
Module: 91
LineInfo: 3b69d552573c3a4d
Fields: $module : arx_agent_fork_vs_39029
Message: Nothing is backed up. See the log for details. Last error:
--------------------
Error code: 399
Module: 91
LineInfo: 3da791ddb8f7769f
Fields: $module : arx_agent_fork_vs_39029
Message: Failed to process database or storage group 'RTTSTYLEJHB-Users'. Attempts have been made to perform the cluster operation on the following nodes: Active copy: ''; Passive copies: 'MERCURY.RTT.co.za'. All of them have failed. The last error:
--------------------
Error code: 17
Module: 91
LineInfo: 7edade4ed07d52dd
Fields: IsReturnCode : 1, $module : arx_agent_fork_vs_39029
Message: Failed to back up the information store.
--------------------
Error code: 9
Module: 357
LineInfo: af78629c19eb599e
Fields: $module : arx_asn_vsa64_39029
Message: Failed to open the data store 'SqliteRanked'.
--------------------
Error code: 4
Module: 355
LineInfo: a72228d344bcc5a9
Fields: $module : arx_asn_vsa64_39029
Message: Volume 'C:\' on which metadata is temporarily stored is full.
--------------------
Error code: 1
Module: 351
LineInfo: 2041f19daa895a44
Fields: code : 1, extended_code : 1, $module : arx_asn_vsa64_39029
Message: A SQLite library error: 'SQL logic error or missing database'.
--------------------
Error code: 18
Module: 349
LineInfo: d472b3f8c4a71c75
Fields: $module : arx_asn_vsa64_39029
Message: Failed to perform the file operation.
--------------------
Error code: 4
Module: 4
LineInfo: 52ca6a3d5c68e7e3
Fields: $module : arx_asn_vsa64_39029
Message: The disk is full.
--------------------