How to share a tape library between two backup solutions?

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How to share a tape library between two backup solutions?

Veeam Logoby zoltank » Tue Sep 03, 2013 1:50 pm

I have both Veeam and Symantec Backup Exec installed on the same server. Backup Exec runs the tape library, backs up the few physical servers we have, and writes Veeam backups to tape to send off site. However, since I installed Veeam v.7 it keeps loading its own tape drivers, which are then conflicting with the Backup Exec drivers and keeping Backup Exec from working. Even when I delete the tape library from Veeam it just adds it back again. Could someone please tell me how I can prevent Veeam from ever even trying to load drivers for the tape library?

I've already opened case #00438411.
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Re: How to disable loading tape drivers?

Veeam Logoby zoltank » Tue Sep 03, 2013 1:54 pm

Or, if Veeam is not installing drivers, then prevent it from looking for and trying to access tape devices.
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Re: How to disable loading tape drivers?

Veeam Logoby foggy » Tue Sep 03, 2013 2:02 pm

There's no way to stop Veeam B&R to autodetect and lock tape devices other than stopping its services. Do you have an ability to install v7 on another server to avoid these conflicts?
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Re: How to disable loading tape drivers?

Veeam Logoby zoltank » Tue Sep 03, 2013 2:18 pm

So Veeam locks the tape device as well?

As much as it sucks, it looks like I'll need to downgrade Veeam to keep this from happening.
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Re: How to disable loading tape drivers?

Veeam Logoby foggy » Tue Sep 03, 2013 2:54 pm 2 people like this post

I've just talked to R&D and there's actually a way to prevent this, at least partially. By default, Veeam B&R performs tape devices rescan each 30 seconds, which makes it temporarily (for the duration of the rescan operation) lock the device. You can increase the rescan interval by setting it to extremely high value so that rescan never occur after Veeam B&R is started (so basically rescan will be performed on each Veeam B&R service start only, allowing you to successfully use BE the rest of the time).

The interval can be set via the following registry key (value in seconds):
Code: Select all
ChangerElementFillCompletionTimeoutSec
DWORD
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Re: How to disable loading tape drivers?

Veeam Logoby zoltank » Tue Sep 03, 2013 3:23 pm

That sounds like it would work pretty well. Would you please tell me where the registry key is supposed to go?
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Re: How to disable loading tape drivers?

Veeam Logoby foggy » Tue Sep 03, 2013 3:27 pm

It's in the standard HKLM\SOFTWARE\VeeaM\Veeam Backup and Replication hive. And don't forget to restart the backup service after creating the key.
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Re: How to disable loading tape drivers?

Veeam Logoby zoltank » Wed Sep 04, 2013 2:06 pm

So far this seems to be doing the trick.
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Re: How to disable loading tape drivers?

Veeam Logoby foggy » Wed Sep 04, 2013 2:09 pm

Glad to hear, thanks for confirming. Probably the next version will allow to disable the rescan operation completely.
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Re: How to disable loading tape drivers?

Veeam Logoby zoltank » Sat Sep 07, 2013 2:36 pm

So far this change is working very well. I'll check back again in 10 days.
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Re: How to disable loading tape drivers?

Veeam Logoby zoltank » Mon Sep 16, 2013 6:26 pm 1 person likes this post

Still working well without issue.
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Re: How to disable loading tape drivers?

Veeam Logoby zoltank » Tue Sep 24, 2013 12:55 pm 2 people like this post

Just checking back in one more time. The fix is still working really well, and I consider this problem resolved.
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Re: How to share a tape library between two backup solutions

Veeam Logoby namiko78 » Wed Oct 16, 2013 12:47 pm

I am also having this issue. Is it possible to address this in a patch, so it can be fully disabled?
Thanks
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Re: How to share a tape library between two backup solutions

Veeam Logoby Dima P. » Wed Oct 16, 2013 12:49 pm

Steven,

Have you tried to modify the registry key as it was mentioned before?
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Re: How to share a tape library between two backup solutions

Veeam Logoby namiko78 » Wed Oct 16, 2013 12:53 pm

Yes, but veeam still tries to access the tape drive on startup, which messes up symantec and causes the jobs to lock up. It would be better if i could simply disable.
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