Acronis Backup error

Good afternoon everyone!

*Backups failing on one server*

I am getting the error below when trying to backup a nearly full drive. This drive is a windows backup job volume and is always nearly full...i assumed it was trying to create a temp snapshot..or something like that...can you look at the error below and see if that is what is happening? The JOB is trying to backup the O: drive on the specific server but failing. Can I move that to a different drive that has more space available?

Acronis Backup & Recovery 11.5 (Build 11.5.38350)

Thanks

Kevin

Command 'Backing up' has failed.
Additional info:
--------------------
Error code: 61
Module: 309
LineInfo: 4a8728dc8a1c950f
Fields: $module : service_process_vs_38350
Message: Command 'Backing up' has failed.
--------------------
Error code: 3
Module: 329
LineInfo: 1cd98aae889424f9
Fields: $module : disk_bundle_vs_38350
Message: Backup has failed.
--------------------
Error code: 1060
Module: 1
LineInfo: ba19e88dc5fea16c
Fields: $module : disk_bundle_vs_38350
Message:
--------------------
Error code: 25
Module: 4
LineInfo: ce542e14da203baf
Fields: $module : disk_bundle_vs_38350
Message: Error occurred while backing up.
--------------------
Error code: 3
Module: 4
LineInfo: ce542e14da203b65
Fields: $module : disk_bundle_vs_38350
Message:
--------------------
Error code: 3
Module: 4
LineInfo: ce542e14da2039b6
Fields: Path : O:/WindowsImageBackup/ftwsvexm01/Backup 2014-08-27 030011/cd693e3b-179d-11e4-8d0a-000c299d519e.vhd, $module : disk_bundle_vs_38350
Message:
--------------------
Error code: 3
Module: 4
LineInfo: ce542e14da203a27
Fields: Path : O:/WindowsImageBackup/ftwsvexm01/Backup 2014-08-27 030011/cd693e3b-179d-11e4-8d0a-000c299d519e.vhd, $module : disk_bundle_vs_38350
Message:
--------------------
Error code: 25
Module: 4
LineInfo: ce542e14da203ae8
Fields: $module : disk_bundle_vs_38350
Message: Error occurred while backing up.
--------------------
Error code: 1
Module: 4
LineInfo: 61f1883fe50b0b26
Fields: $module : disk_bundle_vs_38350
Message: Error occurred while reading the file.
--------------------
Error code: 50266
Module: 16
LineInfo: 14181c22ef45ad99
Fields: $module : disk_bundle_vs_38350
Message: Failed to read the snapshot.
--------------------
Error code: 9
Module: 0
LineInfo: 2aacb7b2ab852ac
Fields: code : 8, $module : disk_bundle_vs_38350
Message: Unknown status.
--------------------
Error code: 65520
Module: 0
LineInfo: bd28fdbd64edb8e0
Fields: code : 2147942408, $module : disk_bundle_vs_38350
Message: Not enough storage is available to process this command
--------------------