Estimated backup size is incorrect
I have ATI 2016 backing up a raid array to an attached Windows 10 Storage Spaces USB drives. The raid array has two partitions set up as drives P: (3.5 TB) and S: (2 TB).
In the backup source dialog, when I select the raid array for backup, it shows an estimated backup size of 1.3 TB.
When I close the backup source dialog, the estimated backup size is shown as 2.2 TB.
If I start the backup, the estimated size jumps to 24.5 TB and ATI spends hours calculating the backup time.
I have run chkdsk on both drives with no issues found.
Any ideas?
Thanks.


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Thank you for the response.
It is a windows (NTFS) raid 5 and the entire size is the two partitions (2TB + 3.5TB ~ 5.5TB).
It is not backing up the entire PC, only those two partitions.
I cleared out the backup data and started the backup. The total was estimated at the 24.5 TB and I watched as the counter counted up to over 32TB then I stopped the back-up.
The log file is below; I trimmed the long error code lines.
Thanks again.
log uuid=6A1A28DC-ACA3-4EB3-8A48-106496524596; product=True Image; version=19.0; build=6571; task=3806DF53-2D38-44C0-82EE-490E21543346; task_name=WHSDataBackup
Start= 9/18/2016 5:33:59 PM
id=1; date/time=9/18/2016 5:33:59 PM; message=Backup reserve copy attributes: format tib; need_reserve_backup_copy false
id=2; date/time=9/18/2016 5:33:59 PM; message=Operation WHSDataBackup started manually.
id=3; date/time=9/18/2016 5:34:03 PM; message=Backup reserve copy attributes: format tib; need_reserve_backup_copy false
id=4; date/time=9/18/2016 5:34:03 PM; message=Operation: Backup
id=5; date/time=9/18/2016 5:34:03 PM; message=Priority changed to Low.
id=6; date/time=9/18/2016 5:34:03 PM; message=The specified file does not exist: F:\Acronis Backups\WHSDataBackup_full_b13_s1_v1.tib.; line_tag=0x4D3F22948E29F1C7
Error_Code=ASMA5QHH8SmOlCI…
id=7; date/time=9/18/2016 5:34:03 PM; message=The initial full backup version is not accessible at the moment.; line_tag=0x65E40AA0B487162; hide=1
id=8; date/time=9/18/2016 5:34:03 PM; message=The specified file does not exist.; line_tag=0xF35F747B3B21FC06; hide=1
id=9; date/time=9/18/2016 5:34:03 PM; message=The system cannot find the file specified; line_tag=0xBD28FDBD64EDB8F4; hide=1
id=10; date/time=9/18/2016 5:34:03 PM; message=The specified file does not exist.; line_tag=0xF35F747B3B21F8E2
Error_Code=AREABADi…
id=11; date/time=9/18/2016 5:34:03 PM; message=The system cannot find the file specified; line_tag=0xBD28FDBD64EDB8F4; hide=1
id=12; date/time=9/18/2016 5:34:07 PM; message=Create Backup Archive From: Disk 2 To file: G:\Acronis Backups\WHSDataBackup.tib Compression: Normal
id=13; date/time=9/18/2016 5:34:07 PM; message=Pending operation 172 started: 'Creating partition image'.
id=14; date/time=9/18/2016 5:34:28 PM; message=Writing full version to file: WHSDataBackup_full_b13_s1_v1.tib
id=15; date/time=9/18/2016 5:34:28 PM; message=Writing full version to file: WHSDataBackup_full_b13_s1_v1.tib
id=16; date/time=9/18/2016 5:38:28 PM; message=Terminated by user.
Start= 9/18/2016 5:33:59 PM
Finish= 9/18/2016 5:38:28 PM
Total Time= 00:04:29
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