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Setting up incremental backup in Backup Exec 2010

Posted on 2016-10-04
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Last Modified: 2016-10-26
Hi,

 In Backup Exec 2010, I have scheduled a daily incremental (?) backup job to back up files and folders (which is about 800GB)  from E drive to an 3TB external hard drive with a hope that it will erase old data necessary to make room for new data automatically.
 The very first job took about 12 hours. 2nd/3rd/4th job took about 7 hours consistently. Since there aren't that many files created or edited daily, I thought it would take less than 1 hour. Windows server backup that is done daily, which is incremental, takes less than an hour.
Apparently I did not set up this job correctly. It is already showing "low disk" on 3TB external usb HD.
I attached some screenshots from the backup job properties.
Can you help?
Job-Properties.doc
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Question by:sglee
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by:Brian B
Brian B earned 250 total points (awarded by participants)
ID: 41830670
Hi sglee,

You can't back up the Exchange database by backing up the drive where it resides. The database is locked and backup will not be able to access it, possibly making multiple tries to do so which would slow down your backup. You will probably have errors in your backup logs that correspond to that.

Now, since you are doing incremental backups, you are only backing up the data that changed since the last backup. In order to maintain the integrity of your backup database, it has to keep every single backup that was made. What you probably want to do is schedule a full backup once a week and then an incremental on the other days.

It might not make much difference, but you are also using hardware compression. Since you are not backing up using hardware (i.e. a tape drive), you won't get any compression. Try using software instead.

I have also added some other topics to your question which are more relevant to the subject at hand, so hopefully you'll get some more answers from that.
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by:Adam Brown
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ID: 41830773
Does the File backup run against the volume that holds the Exchange Database? If so, then it will do a backup of the entire Exchange database every day because the file itself changes. A file only backup running an incremental backup will back up the entire file if it changes, so running a backup on a folder that has an Exchange DB on it will require extra time to completely copy the Exchange DB.

I'm not sure if this is an Exchange server that you're running the backup against or if it's a different file server, or what. What are you trying to back up here?
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by:sglee
ID: 41831021
The E drive has Exchange database folder as well as other user files and folders, but I excluded Exchange database folder from the daily file backup job because I have a separate job to backup Exchange database and user mailboxes on a 4 TB ext Usb drive and it runs fine by erasing old data as necessary.

I changed compression from Hardware only to Software and it make sense to do so since there is no tape drive anymore.

My question is that why backup exec is displaying warning sign about lack of space on 3TB ext usb drive instead of erasing old data as necessary?
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by:sglee
ID: 41831848
Job Monitor My ComputerBackup Device AlertTwo days in the row, it missed the backup with the message: "Error             : e000e020 - The job was scheduled to run, but the availability window closed before the job could start. There may not have been any destination devices available during the window, or the job may have been submitted to run when the window was closed.
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by:sglee
ID: 41831870
Low Disk AlertThe reason that it failed to back up is because the external usb hd has run out of space and somehow the backup device is set not to overwritten?
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by:Brian B
ID: 41831986
Can you look at the actual contents of the backup drive? That may help you to see the backup sets and understand why the space is being used up. You said the drive being backed up is about 800GB, but how big have the backup jobs been so far?
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by:sglee
ID: 41832018
Is this what you are looking for?
3TB Ext USB  HDJob Monitor
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by:Brian B
ID: 41832034
Yes that's it. It almost looks like the backup if full not incremental. Looking back at you original document you attached, it appears that the job is full, not incremental. Can you confirm? It the job is set correctly, look at some of the files to ensure the archive bit is being set correctly after the files are backed up.
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by:sglee
ID: 41832112
Backup Job GeneralBackup Job General - OptionsHere are the screenshots related to Backup Method. First screen shot shows what is currently set and 2nd screen shows other options.
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by:Brian B
ID: 41832425
Okay, so it is incremental, that's good. However my second point still may apply; Your backups are the same size everyday and it appears to be all the data is being captured. Check the archive bit on some of the files.
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by:sglee
ID: 41832432
@Brian
You misunderstood. Currently selected backup method is "Full - using archive bit (reset archive bit)."
I just want to have one full backup and backup changes only thereafter.
What should I choose?
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by:Brian B
Brian B earned 250 total points (awarded by participants)
ID: 41832443
Ah, there is the problem then. I would say schedule the full job once a week and an incremental job the other days.
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by:sglee
ID: 41832450
"say schedule the full job once a week and an incremental job the other days." --> if it is going to perform a full backup every week, won't 3TB external USB HD eventually run out space unless it erases old data automatically?
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by:sglee
ID: 41832635
@Brian
I like to start from the scratch, so I re-formatted 3TB HD and deleted current backup job along with history of jobs.
What backup method should I choose if i want a full backup of E Drive and backup changed/new files only thereafter?
Backup Method
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Adam Brown earned 250 total points (awarded by participants)
ID: 41832749
You'd need to create 2 jobs. One set as a Full backup and the other set as Incremental. The full backup would need to use the same method (Archive bit vs modified time) as the incremental. You can either schedule a weekly full backup or just do a single full backup with incremental backups thereafter (Up to you). Doing the latter will likely result in significantly longer recovery times, but also significantly less storage used.
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by:Brian B
Brian B earned 250 total points (awarded by participants)
ID: 41833653
I'm not sure the software you are using manages the backups as  far as getting rid of older ones. You may need to manage the backup files manually (or write a script to do it). Think of the files like tapes... Eventually you rotate the tapes and have to erase one to reuse it.

As to the idea of running incremental all the time, just keep in mind if you ever have to recover something and all you have is incrementals, the restore process will have to go through each individual file. That could take a long time.
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by:sglee
ID: 41833683
What backup software (other than this Symantec Backup Exec) works like Windows Server Backup where it makes up a complete backup and do incremental backups thereafter? It seems Symantec Backup Exec is very outdated. I like to pick the folder for a backup and it should do a complete backup first time and should do incremental thereafter.
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by:Brian B
Brian B earned 250 total points (awarded by participants)
ID: 41833696
Yes if it's the 2010 version it is very outdated. Newer products are designed specifically for using disk based backup and would probably work much better for your needs. Symantec Netbackup is now sold as Veritas. Other than that there a lot of backup products:
http://www.storagenewsletter.com/rubriques/market-reportsresearch/2015-magic-quadrant-for-enterprise-backup-software-and-integrated-appliances-gartner/
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by:sglee
ID: 41857469
Job monitorHD UsageSorry for the late reply.
Update: I created two backup jobs:
(1) E Drive Full Backup: performed only on Sundays.
(2) File Backup Incremental: Incremental backup of E Drive daily.
(3) Media set configuration: for both (1) & (2)
Keep Data for 1 Week. Append to media, overwrite if no appendable media is available.

So far it has been doing a weekly full backup and daily incremental backups flawlessly.
Although I will have to see how the space will be managed when the 3TB USB HD runs out of space, I hope it will erase old backups in order to perform new backups.
Did I set it up correctly by creating two backup jobs?
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