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How to configure Media sets and overwrite protection

Created: 14 Feb 2014 | 8 comments

Hi

 

Advice please.

 

I need to set up a daily job to a removable USB drive.  This drive will be removed and repalced on a seven day cycle.

 

On the seventh day I also want to schedule an additional job to back up extra files.

 

What is the best way to create a media set and what settings should i use regards overwriting the media or appending.

 

I assume i set up B2D as removable device.

 

I'd like to know for 12.5, 2010 and 2012 but imagine the same principal will apply.

 

Thanks

 

Operating Systems:

Comments 8 CommentsJump to latest comment

Laurie_Downey's picture

For BE 2010 R3 refer to: http://www.symantec.com/docs/HOWTO55855

 

BE 2012 works a little differently so you will want to refer to the following: http://www.symantec.com/docs/TECH38839

Laurie Downey

Backup Exec

Advanced Tech Support

Symantec Corporation

www.symantec.com

 

 

revenge of the cream's picture

Thats great,

How should I set the append/overwrite for the second weekly job?

pkh's picture

1. You do not append to disk media. There is no advantage to this. You always specify overwrite in your jobs

2. Read my articles below on how to set up your disks

https://www-secure.symantec.com/connect/articles/h...

https://www-secure.symantec.com/connect/articles/h...

3. For BE 2012, your disk storage would be managed by DLM so media sets does not apply. For the older versions, all you need to set is the OPP.

Laurie_Downey's picture

For BE 2012 you could set up a device pool to achieve what you are wanting to accomplish

Refer to the following for weekly rotation of USB devices with Backup Exec 2012: http://www.symantec.com/docs/TECH124516

 

Laurie Downey

Backup Exec

Advanced Tech Support

Symantec Corporation

www.symantec.com

 

 

Colin Weaver's picture

Hmm 12.5 didn't officially support detaching USB disks (The removable backup to disk option in 12.5 was intended for cartridge devices where the chassis of the device remains connected to the backup server)

If you detach a USB disk in 12.5 and it goes offline then it is likely to remain offline even when you re-attach it unless you restart the BE services with the USB disk online.

Despite not really being designed into the product, some customers did find unofficial workarounds to manage detaching of USB disks, in 12.5). In some cases I believe the workaround involved giving each USB disk it's own reserved driver letter, doing service restarts and putting the disks into a custom device pool (and sending the jobs to the pool) As all of these options are not official (in 12.5) it would be down to you to fully test what does and does not work for you

EDIT: and to explain a point others have made. a Backup to Disk folder is a container for multiple individual (or sometimes linked if max size is reached) pieces of Backup Media. (usually referred to as bkf files). When we talk about Overwrite and Append to a backup to disk folder we are talking abouth the BKF files and not the whole of the disk storage device. An Append would add to an existing BKF file with an Overwrite choosing to delete and recreate the BKF file rro make a new one) with new content.

For various reasons appending to bkf files can, over time, cause confusion over required media and in worse case scenarios inability to be able to restore. As such we always recommend using Overwrite Jobs to backup to disk storage (and in fact in the latest version of Backup Exec we have removed the ability to Append to such files.)

BTW if your backup to disk folder contains IMG folders (GRT enabled sets) then we have always created new ones of these and never appended no matter what the settings in the job.

 

 

revenge of the cream's picture

Hi Colin

 

So if i set two overwrite jobs to the same USB disk, one straight after the other but my media set is configured to not allow overwrite for 6 days.  Will it put both jobs on the same drive?

Or am I better creating one job to run 6 days a week and another for the seventh day including all the files i need?

 

Thanks

 

Colin Weaver's picture

If you set both job to the same drive like you state and both start as Overwrite then as long as there is space the second job will create a new bkf file (or-use one from 6 days earlier if found, depending on other settings)

What customers often get wrong is that if a tape is inolved in the same scenario then the 6 day overwrite protection would actually cause the second job to sit asking for a new tape  (unless second job was set to append) - because an overwrite on tape does affect the whole of the tape, where an overwrite on disk only affects the media files held on the disks. It is this difference we are trying to explain whilst stating the you should not append to disks (because this can cause other problems)