Link to home
Start Free TrialLog in
Avatar of HaulnSS
HaulnSS

asked on

Slow Job Rate on Backup Exec 11D with HP USB DAT 160

I have tried many suggestions already listed her, with no success.  Here is the scenario:
Old Dat 72 with Backup Exec 10 and SQL agent was running fine.  I needed more capacity, upgraded to USB DAT 160, removed old drive.  Upgraded Backup Exec to 11D with SQL Agent.  Since then, backups have taken several hours (25hrs).  I have yet to try and backup everything but our database etc.  I have updated the drivers for the backup drive, Backup Exec has all current updates.  I disabled the Removable storage service.  I have played with the Block and Buffer sizes.  I have disabled compression.  
Any other ideas would be appreciated.
Server is a DL380 running Windows 2000 and SQL.
ASKER CERTIFIED SOLUTION
Avatar of dauman
dauman
Flag of United States of America image

Link to home
membership
This solution is only available to members.
To access this solution, you must be a member of Experts Exchange.
Start Free Trial
Avatar of HaulnSS
HaulnSS

ASKER

It was scsi, but I am only getting 53MB/Min on the USB.  They certainly advertise a lot more than that.  I have another USB drive on a seperate server that gets a lot better rate.
thats not surprising.
but that depends on the file length, quality of the drive and quality of the host usb~ide/sata controller inside the housing.

heres a software that will rate your drive/connection in max mb/sec
http://www.simplisoftware.com/Public/index.php?request=HdTach
you will notice scsi is way up 300mb/sec and you will probably find usb around 80mb/sec max

your usb interface on the computer can slow things down, the usb interface inside the drive can slow it down further.
for the best output for external devices is scsi,  esata, firewire 800, then usb2.0, firewire 400, usb 1.0

all of that is dependant on the quality of the card they are plugging into and the drive's interface itself.

does that drive have any other interface than usb?  also are you sure your plugging it into a 2.0 port?

for the most part you will find for convenience usb is good.. but for speed it is not the best choice.
Avatar of HaulnSS

ASKER

I completely understand what you are saying about USB, I checked into the speed limitations etc.  I am however getting 50mb/min, which is much slower than it should be.  I will try out your software link.
Just as a test connect the old tape drive just to verify the throughput problem is at the USB and not the application end.
What generation DL380? It should have a G-number on the front unless it's really old G1.
Avatar of HaulnSS

ASKER

It is a G3, I will try the old drive today.  Maybe the USB isn't 2.0, I have not been able to confirm that.
Even if the hardware is USB 2.0 the OS might not be.
Check this out.
http://support.microsoft.com/kb/319973
Avatar of HaulnSS

ASKER

That seems very possible, but I can't seem to find the driver it references.
Avatar of HaulnSS

ASKER

Does the fact that my Device Manager shows -  Standard OpenHCD PCI to USB Host Controller - mean anything???
It has been incorporated into the latest W2K service pack.

RESOLUTION
To resolve this problem, obtain the latest service pack for Microsoft Windows 2000. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
260910 (http://support.microsoft.com/kb/260910/) How to obtain the latest Windows 2000 service pack
Avatar of HaulnSS

ASKER

I have SP4, which says that is the one that supports USB2.0.
SOLUTION
Link to home
membership
This solution is only available to members.
To access this solution, you must be a member of Experts Exchange.
Start Free Trial
one other thing to try to verify the maximum throughput of your drive is create a job where only the pagefile.sys is selected and then check the rate on the report.

did you run the software and get a result of speed other than 53?
Avatar of HaulnSS

ASKER

andyalder...  This certainly would make sense.  I will order a usb 2.0 card.

Thanks for all the help and suggestions everyone!  I have another SCSI backup that is running slow as well.  I will try out the suggestions and may be posting another question soon.
dauman was actually first to asy you had to use USB2.0, I just confirmed what the machine had in it.
Avatar of HaulnSS

ASKER

I agree, I was going to review everyone's response again before I awarded points.
Avatar of HaulnSS

ASKER

Well, Four PCI cards later and no luck (They caused server to error).  I am going to go back to the DAT72 and only backup the pertinent info, until I get the new server in place.

Thanks for the help.