BAB 11 & DLT VS80 very slow only 3.5MB/Min 1

[Conman]

I have BrightStor Arcserve Backup Version Release 11 for Windows and a Hp Storageworks DLT VS80 it takes 3hrs to backup one gig using BrightStor. I tested it with NTBackup and it only took 7mins to do the same.

Looking in device manager within BAB I can see that the DLT is being picked up correctly but if I look at the 'Details' and 'Cartridge Type' it is listed as a DAT tape, not sure if that should read DLT. Any help much appreciated

 

[Conman]

Sorry thas on a W2k3 Server...........

 

[ACiDelic]

I did some searching on the CA support site (

http://supportconnect.ca.com)

and found these three items:

http://supportconnect.ca.com/sc/sol...&release=11.0&number=0000032&type=&os=WINDOWS

http://supportconnect.ca.com/sc/kb/...6/14/2004&relevance=100%&fromscreen=kbresults

It looks like there is a known problem. Try contacting CA support to see if they have a fix yet.

 

[rn53982]

Conman,

I had the exact same problem as you with this drive. I was only getting backup speeds of any where from 3-5 MB/min which is extremly slow. To fix the problem, I had to enter the following entry into the windows registry. I am running Windows XP Pro SP1 by the way.

HKEY_Local_Machine\Software\Computer Associates\Brightstor ARCserve Backup\Base\TapeEngine\DEVICE2

Under this key I had to add a new DWORD Value.
Name= DefaultBlockFactor
Type= REG_DWORD
Data=7

Make the data value HEX and just put in 7 for the value.

Above where I have DEVICE2 in the key, you may have other device folders listed. Just click on each one and look for your drive to show up. I have two tape drives show one is under DEVICE2 and the other under DEVICE1.

Once you make the registry entry you will need to reboot your machine. I did this and my backups went from the 3-5 MB/min to 175-200 MB/min. By default, arcserve backs up data in 1KB block sizes. By making this registry entry and setting the data value = 7, you are telling it to backup in 64 KB block sizes. You can set this data value equal to any value 1-7, each corresponding to a block value (1=1KB, 2=2KB, 3=4KB, 4=8KB, 5=16KB, 6=32KB, 7=64KB). A value of 7 is obviously going to give you maximum results.

I hope this helps your problem. It sure helped mine. Feel free to contact me if you have problems or my directions are confusing.