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BackupExec 2010 R3 on Windows Server 2003 SP2 Suddenly Slow thoughput

Created: 21 Mar 2013 • Updated: 26 Mar 2013 | 11 comments
This issue has been solved. See solution.

Hi all,

My Media server (backup server) is running

- Windows Server 2003 SP2

- BackupExec 2013 R3

- attached a SAN storage

- with HP tape library (LTO 4)

- Backup job included backup Local Disk, Virtual Disk (from  SAN) and remote server

Two weeks before, the backup job rate is nromal, it running from ~3,000 MB/min

And, Now it drops to 180MB/min

 

I apply all the hotfix by "Live Update", disable "Removable Storage" service, reboot the server and Tape library.

But, no luck! no any improvement on the job rate!

I tested the network speed by copying a 4GB file between a remote server to media server, it is noraml and takes ~ 2 mins.

And, tested the I/O read/write on SAN by copying a 4GB file between SAN and the media server, it also noraml and takes < 2 mins.

 

Now, I found that BE takes over than 1 hrs, but still backing up a 8GB file!?!?

 

Does anyone have any idea to fix this problem?

 

Many Many Thanks!

 

 

 

 

Operating Systems:

Comments 11 CommentsJump to latest comment

CraigV's picture

Hi,

 

Any changes to Windows via updates, or a new AV installed or new antivirus definitions etc? Check any AV installed and make sure it isn't scanning the BE services, and if so, put in an exclusion for this.

Thanks!

Alternative ways to access Backup Exec Technical Support:

https://www-secure.symantec.com/connect/blogs/alte...

TTHK's picture

Hi CraigV,

Thanks for the tips, it did have Windows & AV updates.

And, I tried to disable the AV for a while during Backup, but no improvement as well.

But, will try to set exculsion in the AV to see any improvement.

Thanks!

 

 

TTHK's picture

I following McAfee to did the exclusion
https://kc.mcafee.com/corporate/index?page=content...

But, it seems no improvement

Then, I try to increase the buffer size, buffer count and High water count to see any improvement.

But still no improvement!

I found when BE backup a large file (e.g. 7GB) in remote server, it started at ~3, 000MB/min, after an hour it will drop to 400MB/min.

After it finished backup the large file, it still keep at 400MB/min, no increase backup rate and even drop to 200MB/min

Roar!!!

@@

CraigV's picture

...try backing up to a B2D and see if you get the same issue. The only other thing I would suggest is to make sure that your media server is fully patched, and that these patches have been push-installed to any remote servers you might have.

Also, if need-be, uninstall the patches applied to Windows, and apply them 1-by-1 to see if 1 of these caused your slow-down.

Thanks!

Alternative ways to access Backup Exec Technical Support:

https://www-secure.symantec.com/connect/blogs/alte...

TTHK's picture

Hi both,

I inspect that it may be caused by tape drive, it already used to run backup for over 3 years.
backup 16 LTO-4 a week

Do you have experience that the slow performance is caused by the old tape drive?

Hi pkh,

Yes, the articles is good. i refer this articles to tune my tape drive as well.

Thanks!

CraigV's picture

...run a cleaning tape and see if this helps at all. If it is an HP drive, HP Library and Tape Tools can do a write test on the drive, which would be agnostic to BE (just stop the BE services or it won't detect your tape drive and robotics at all). You need a blank tape for this. If it gives you the same write speeds then the issue lies with the hardware and not BE.

Thanks!

Alternative ways to access Backup Exec Technical Support:

https://www-secure.symantec.com/connect/blogs/alte...

SOLUTION
TTHK's picture

CraigV,

I can set backup to disk, although i set device and media, but after start the job it prompt

====================================
No drives were found that support hardware encryption.

@@

Really getting crazy

CraigV's picture

...OK, so the obvious question is any encryption enabled in the job? Or on the device (tape)?

Thanks!

Alternative ways to access Backup Exec Technical Support:

https://www-secure.symantec.com/connect/blogs/alte...

TTHK's picture

Hi CraigV,

Thanks for your tips and patience!

Just run the HP Library & Tape Tools and it reported there is error on the drive.

Due to the SLA, they will come & check drive tomorrow, see it is the root reason or not.

Thanks!

TTHK's picture

Hi both,

Finally, HP engineer come onsite and replace the LTO-4 drive.

Now, the backup data rate resume, from ~ 200MB/sec to ~4000MB/sec.

As CraigV's suggestion, for those users running HP Tape Drive/Library, I would highly recommend backup operator to run HP Library & Tape Tools to find out there is any problem in hardware, before drill into software and network investigation.

Thanks all!