Question about Dell PowerVault 110T DLT VS160 DLT Tape Drive

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Backup Problem With Win 2003 Server and Veritas 10D Software there is no compression, though in the tasks compression is enabled. After reaching 80GB of data in a backup, the tape comes out and the backup-software asks for the next tape. We use DLT VS160 Tapes from Dell where about 160 GB should be no problem. Thanks in advance.

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80GB is the non compressed and 160GB is fully compressed. Based on my experience youll never get a compression rate of more than 1.5 to 1, so you should expect to get more than 120GB on the tape.

The issue that you are having is that you are using the drivers that either are built into windows or came with the tape drive and not the driver from symantec.

Go into Tools->Wizards->Device Configuration Wizard and follow the step to "Install tape device drivers". This should take care of the compression issue.


Posted on Feb 08, 2009

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How to configure or enable hardware compression in DW065B LTO1 Drive. When trying to take backup in H/w compression mode the tape (100/200 GB Tape) is ejected.


The L&TT support ticket contains drive configuration information such as whether hardware data compression is enabled or not.
Use L&TT to pull the ticket then look in the Drive->Drive Configuration section for details.
Here's an example:
|__ Drive
||__ Data compression : Enabled
||__ Current block size : Not available
||__ Detect WORM tampering : WORM not supported
||__ Reads after WORM tampering : WORM not supported
||__ Media removal (software controlled) : Allowed
If data compression is not enabled then it is likely that it has been turned off by the backup application. Check the options in your application to ensure that software compression (done by the server) is turned off and hardware compression (done by the drive) is turned on.
Data compression can be turned on in the drive by
  • The application ( the application will usually override the drive configuration so configuring the application correctly is of prime importance)
  • Resetting the drive
  • Power cycling the drive
  • Using the L&TT Set Drive Configuration utility (use the options to enable compression -see the L&TT user guide below)
NetBackup usersCaution NetBackup will turn off hardware compression in the drive at the end of each backup, so when you look at it with Library and Tape Tools it will be off. This is actually normal for NetBackup, so please check the configuration of NetBackup to make sure that compression is configured correctly. In this case see 'Measure Compression Ratio' (go back one level) as that will show whether compression has been in operation in the drive.
Click here to download the free L&TT utility (www.hp.com/support/tapetools) - this will also access the L&TT user guide
Use the L&TT FAQ to find out how to pull a ticket.
Click here for the L&TT FAQ. (www.hp.com/support/lttfaq) Look for How do I generate a support ticket? in the contents.

Aug 03, 2010 | HP HEWLETT-PACKARD DW065B ULTRIUM 232...

1 Answer

HI TLD tape drives are writing with low transfer rate. we are using veritas netbackup 6.5.3 verision


Hi,
The low throughput may be because of many factors. Check the below factors.. It could improve your throughput.
1. Restart and disable any antivirus firewall on both backup server and client. The network utilization should be more than 20% in the master backup server. Just to make sure there is no hinderence to data flow, try copying a single big file (a 1Gig ISO file will do) from any server to backup server, the network utilization should shoot above 10% then. And will vary to 20%. If it is steadt @ 8 or 10% then firewal is the culprit. Disable it.
2. Team 2 or 3 NICs in the master backup server. Teaming at the client will also help.
3. Check the total size of data to backup, and the average size and number of files to backup, if the average size is in the range of KBs and the number of files is very high. Then only the 'Flash Backup Liscence" will only help.
Please come back and post the ratings for my solution if it turn to be of any use to you. Thnx

Mar 15, 2010 | HP (DW017A) Ultrium Tape Drive

1 Answer

Certance DAT 72 tape drive stopped communicating with PC


We have had the same problems with HP drives and Veritas. In our case it was not the drive per se. While I am assuming that based on the date of your post that you have moved to another solution, however, I will provide for you what we did.

First shut all down, disconnect the tape drive from the scsi cable, then restart. Go into computer management and turn all your backup exec services from auto to manual. Now go to devices and do a rescan. Once this is done and you see no tape drive whatsoever in the devices shut down the server. Reconnect the scsi cable to the drive and restart.

Go back into computer management, back to devices and rescan for hardware changes. Do you see it? If so, good! Sometimes a re-seating of connectors will do that. On the other hand, it could also be a tape driver from Veritas that just doesn't work (my case), take the original driver cd that came with the unit and start that loading up. Can you see it now? Can you use windows backup to access the tape drive? Now go into services and start the services individually. Go into backup exec and see if you can read your tape. Go back to services and reset all services back to auto. If you ever have to reinstall/upgrade backup exec, think twice about using their drivers.

Nov 12, 2009 | Certance Internal DAT 72 (cd72lwh-s) DAT...

1 Answer

Sun L25 Tape Library


what drives are inside as these units can come in several configs. For all SCSI units the Adaptec 29320 is good for fiber the qlogic cards are my prefered cards.

Drivers are available from sun for the library and drives although you can sometimes use the standard windows drivers for many drives. (search for LTO as the tape drive manufacturer in win drivers for LTO) Although best to use sun drivers if at all possible.

Library comes up as a medium changer in device manager.

What backup software are you using? If Backup exec then the latest version already comes with their drivers built in

hope this helps

Aug 27, 2009 | Sun StorEdge L25 (SG-XLIBL25D-BASE) DLT...

2 Answers

I have a Quantum SDLT 320 drive in a Dell 2800 server that has the yellow attention light stuck on. It is performing backups successfully in Veritas and giving no errors from Veritas or anywhere else. Can...


Sounds like it may be the cleaning light (far right)

You need to use a cleaning tape in the drive (they do expire after either 20 or 40 uses so use a brand new one to be sure)

That should clear the light. If it comes back on after another backup then try using the cleaning tape again and then a brand new tape for the backup.
If the light comes on again then the drive will need to go for repair as the head is knackered.

Try www.tape-drive-repair.com for this as they are pretty good price wise and also offer a 1 years warranty on their drives and repairs

Aug 13, 2009 | Quantum ValueLoader SDLT 320 Super DLT...

2 Answers

Quantum superloader not showing in windows device manager


First off, I have to say that I have had nightmares with Quantum tape libraries. It is possible that they are still manufacturing lemons. I had one replaced 4-times and it still did not work!

Start troubleshooting by making sure that it is identified by the controller card it is connected to. You should see this during the server POST before Windows starts. If you don't see it there then Windows definitely won't see it. Send it to Quantum for service.

If the controller sees it then make sure that you are using the Backup Exec drivers. Never use the manufacturer's drivers with Backup Exec. Veritas, now Symantec, has a downloadable utility called the Device Driver Installation Wizard that will make sure you have the correct driver loaded.

I hope this helps.

Nov 13, 2008 | Quantum SuperLoader 3 LTO 2 Tape Drive

1 Answer

Tandberg LTO HH (LTO-3)


The error is because the driver isn't loaded for the device. Look up how to add the device in symantec help. If windows recognizes it already then usually you can go to devices and add teh device from within symantec.

Jun 03, 2008 | Tandberg Data 200/400GB 420LTO LTO2...

2 Answers

Benchmark VS80 Tape drive giving Bad Media messages


Sounds a bit strange - I've seen this happen when tapes are re-used in a different drive but not when re-used in the same drive. You could try degaussing (magnetically wiping) the tapes. This should effectively make them appear as new ones.

Apr 07, 2008 | Benchmark DLT1 DLT Tape Drive

1 Answer

My Tandberg LTO Drive isn't working with Veritas Backup Exec


When you say 'rolled back' did you use a system restore function? Do the backup logs say why they failed?

Sep 12, 2007 | Tandberg Data 420LTO LTO 2 Tape Drive

1 Answer

How can I turn on/off hardware compression in Windowns 2003 Server


Hardware compression is more efficient and faster than software compression and under normal constancies you won't want to do that. Having said that if your drive allows it you would need to download and install a software utility made by your tape manufacturer. That what you will use to turn off that functionality; not a setting on the PC or the backup software. Bottom line is you will need to talk to IBM support. Probably not the answer you wanted to hear but I just went through this with HP a few months ago. They have a general purpose utility that turns off the hardware compression, does a drive analysis, a cheapo write current alignment, firmware update and a few other neat tricks.

Jun 27, 2007 | IBM 100/200 LTO (59p6717) Ultrium Tape...

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