Locking partion D taking too long in Disk based backup
Hi ,
I have just run a new job , which is a disk-based backup and from the log it is observed that it is "Locking Partion D".
This task has been apparently running for a few hours already with no end in sight.
The D drive has quite a large amount of files around 3 TB worth of files. My Acronis version is : Acronis Backup Advanced 11.7 ( for Windows Server)
The source/data ( server)is running Windows Server 2003 while the Acronis is installed in Win Server 2012 machine.
Appreciate your assistance on the issue. Thanks.
Hi Ekaterina,
Appreciate your response on my query.
I managed to get hold of Acronis Customer Support and they adviced me that for Disk-Based backup Acronis requires around 20% of the total backup capacity ( in my case total backup capacity is 30 TB) on C drive ( this can be changed to any other partition )for the Acronis to take a temporary snapshot.
Which in my case is not possible as of now. So I've withdrawn from the possiblity of disk-based backup and am trying file-level backup. (Apparently for which too the itzam DB is too big and support-team has recommended to reduce the backup size for each job -which is not an option for me now).
Anyways I'm trying to complete a successful backup job, hopefully..
Thanks for your advice I will try that too
Regards,
Shintu
Thank you for additional details! Yes, a backup task can stuck at snapshot creation when there is not enough space to store volume snapshots. More about snapshot technology you can read here).
In the command line (Start-Run -> cmd), issue the following command: vssadmin list shadowstorage
You'll get the list of volumes with the size of VSS storage. The article also explains how to extend the storage or make it unlimited E.g. vssadmin resize shadowstorage /for=c: /on=c: /maxsize=unbounded
Alternatively, if none of the listed solutions work for you, you can temporary disable VSS in the Advanced settings of the backup plan (Volume Shadow Copy -> Do not use VSS). Re-attempt backup after that. In this case a VSS snapshot will not be created for the selected volumes, this might result in the data inconsistancy if some data will be modified or moved during the backup process. What kind of data are backed up? If you want to image running databases like Exchange or SQL, we'd recommend to stop DBs prior taking a snapshot and then start again using Pre\Post commends. Thus we can ensure the resulting backup will contain consistent image of DBs without using VSS.
Thank you,
Hi Ekaterina,
Thanks for the technical information. As you said I will try to disable VSS and run the backup again.
There wont be any issue of data inconsistencies because the data is only video files from the CCTV so disabling VSS seems like a good option.
Also I would like to seek your advice on the below:
If I opt for disk-based backup, as per Acronis Support team I need around 20% of the total backup data-size for snapshot (as I mentioned in the previous post). My total data size is 30TB so 20% would be around 5.6 TB. My question is if reserve 2TB of storage will this be sufficient to run disk-based backup.
Appreciated.
Shintu
Hello Shintu,
The size of a resulting schadow copy will depend on the amount of changes made to the source data during the backup operation. You may want to re-schedule backup to a different point of time, where the source data are not modified\used by other processes and test if a created snapshot fits the free space. Also note, that if only a small block of the file has been modified - the whole file will be considered as changed and will be included into a snapshot. Thus, if you have large media files, changes in these files can make a significant contribution to the resulting snapshot.
Thank you,