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Sonicwall CDP Backup stopped - how to restart

Posted on 2013-12-03
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Last Modified: 2013-12-10
I have a sonicwall CDP appliance I use to backup my servers. I installed the agent onto a server that has about 200gb's of data. The CDP job began to run and started backing up the files. About half way through it stopped with a file it couldn't backup.

I don't know how to get it to start again. If it was a scheduled job it would run on the next schedule but this job runs continuously. If I add or change a file it immediately backs it up but I have about 100gb's of data that has not backed up at all.

I tried restarting the agent several times and rebooting the CDP box but that didn't help.

Any suggestions on how to get the remaining data to backup would be appreciated.
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Question by:AJNS
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by:diverseit
ID: 39694963
Hi AJNS,

Are you getting a specific error in the logs?

What model CDP do you have?

What versions are the servers in question, e.g. Windows Server 2012, etc?

What kind/type of data is it failing to backup or getting stuck on? Exchange related or just flat files (docs)?

Thanks!
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by:AJNS
ID: 39705966
Sorry for the delay, I was sure I had responded to this and was waiting to hear back. Must not have submitted it.

Anyway, it is flat files copying from win 2008 r2 to a 310.

The error was that the backup job had failed but since then I removed and re added the agent and the backup ran again from the beginning. No error this time, it thinks it completed and it is doing the continuous protection, backing up new and changed files.

However it is at about the same point. It has about 140gb's of data backed up in just over 328,000 files. On the server it shows 220gb's of data in 478,000 files.

I double checked the agent and all the files are selected. I checked the quota on the sonicwall and it is set for 300gb so that's not the issue. It seems to me it's failing to backup a lot of data in those folders. Could the de-duplication be that good?

I don't know how to verify it. I randomly selected some data to restore and that was fine but I'm worried a month from now somebody will need a file restored and I won't have it.
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by:diverseit
ID: 39706715
You should be able to set it up to alert you when failed from the logs.

I'm not sure why it's almost doubled in size...versioning?

You should be able to do a side-by-side comparison between the live data and the backup to see what is adding more.

Check there and let me know.
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Author Comment

by:AJNS
ID: 39706827
Sorry for the confusion but it's actually the opposite. The backups are much smaller. There are random folders that are not backed up.

The only errors are a couple of files here and there. No big deal, they were actually corrupt files left over from old Mac users. It is working now without errors its just that there is about 100gb's of data not backed up.

I don't know why it has not backed up those folders and files or how to make it back them up.
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diverseit earned 500 total points
ID: 39706842
Are you on the latest release of the firmware & software?

FILE LIMITATIONS.

Are the disks FAT32 by chance or NTFS? Wondering if file limitation are affecting these backups.

There was a limitation occurring when performing a local archive of a file larger than 4 gigabytes to a FAT32 file system on a USB drive. The workaround was to reformat to NTFS and the solution was to upgrade to SonicWALL CDP 5.1 release.

Also, the CDP system has no set maximum length, but is limited instead by the host operating system on which it is backing up. e.g. on a Windows file system using NTFS disk formatting, files are limited by Windows to a maximum file name length of 256 characters. As this is enforced as a part of the NTFS format, CDP must naturally adhere to that same limit.

ADD FOLDERS MANUALLY:

via AGENT TOOL:
Open up the Agent Tool for the Agent to add the folder backup to.
Click on Folders, Click Add Folder.
Select the folder to add, Click OK to accept the change.
You will see the folder appear.
Click on the Status page to see the files seeding.

via ENTERPRISE MANAGER:
Log into the Enterprise Manager
Click on Agents, Highlight the agent that you want to add the folder backup to.
Click on Add folder
Enter the full path of the folder (below) :
Click Save for the folder to appear and start to seed.

HUNG FILES

If it's percentage of completion has not moved in minutes, hours, or days, on your Windows system, go to services.msc and simply restart the CDP or IBR Agent Service -- 99.9% of the time this will resolve the issue and the backup will restart, completing normally. This rare behavior is normally caused by the service having hung briefly and not resumed properly, or the connection from the Agent host to the appliance on port 1000 was briefly interrupted, causing the backup to hang. This almost always will appear on a very large file in CDP mode backups, and typically the file will be 1+ gigabyte in size.

On Linux and Apple this is even more unusual, and extraordinary for how rarely it occurs. I'd recommend contacting SonicWALL support for guidance on how to restart your Agent service on these systems (various by distribution and version).

let me know how it goes!
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Author Comment

by:AJNS
ID: 39708511
It was the 256 character limit. There was a subfolder buried in there. Each time the backup hit that folder it would error out. The CDP would continue to update files but would not finish seeding.

Once I excluded that folder and restarted the agent the seeding continued and is almost done.

Thank you for the help.
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by:diverseit
ID: 39708554
You're welcome! Glad I could help and thanks for the points!
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