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DAT160 USB External not performing ANY hardware compression

James A-K
Occasional Visitor

DAT160 USB External not performing ANY hardware compression

The tape drive is brand new, I have tried using Backup Exec 12.5, NT Backup and HP Data Protector Express (comes bundled with the tape drive) I can't get any compression over 1:1, Data Protector Express is showing 0.7:1 (how can that be!!) I have tried on 2 servers (2nd being a Prolient ML110) with the same result. The test data has no jpgs, mp3 etc and I know it is compressible. I'm not looking for 2:1 just more than 1:1 as I need to backup more than 80GB which I should be able to with a DAT160 tape drive.
HP Storage works library and tape tools shows that compression is working at over 2:1 but there is no compression with real backups! I have checked firmware and drivers are all the latest.

Please can someone help?
21 REPLIES
TapeDrive Killer
Trusted Contributor

Re: DAT160 USB External not performing ANY hardware compression

Choose only hardware compression and none software compression

Pablo Alvarado Siles
One drink away from sleeping on the pavement
Castellino
Occasional Visitor

Re: DAT160 USB External not performing ANY hardware compression

Try HP libarary and tape tool's. and under the etest option there is device configuration test. i think it has an option to enable hardware compression.

but if its a DAT160 it should surely take 80GB on a cartridge for sure not too sure as to why it doesnt happen
James A-K
Occasional Visitor

Re: DAT160 USB External not performing ANY hardware compression

Hi, thanks for your replies.I do have only hardware compression enabled.

I will try to enable hardware compression using the HP libarary and tape tool's tomorrow, but to be honest it shows as being enabled eveywhere I look, it just does not actually do the compression. It does backup 80Gb onto a tape but not any more.

Regards
Matthew Cutting
Occasional Advisor

Re: DAT160 USB External not performing ANY hardware compression

Hi there,

I was just wondering if you have had any luck resolving this? we are having exactly the same issue with a customers tape drive...

Thanks.

Matt
Víctor Cespón
Honored Contributor

Re: DAT160 USB External not performing ANY hardware compression

Stop the backup software services, reboot, and perform the compression test with L&TT.
Many backup programs disable compression on the drives as soon as the service starts.
Matthew Cutting
Occasional Advisor

Re: DAT160 USB External not performing ANY hardware compression

I have tried the HP Tape tool, and compression works okay with that. Backup Exec 12.5Gb only notices the tapes as 80Gb tapes and will not go over this amount. Same as NT backup. Any more thoughts?
Víctor Cespón
Honored Contributor

Re: DAT160 USB External not performing ANY hardware compression

If L&TT can use the compression and the compression test shows 2.x:1 compression then the problem is software related, not hardware.
James A-K2
Occasional Visitor

Re: DAT160 USB External not performing ANY hardware compression

Hi Matthew

I did not ever manage to get to the bottom of it. I had various support calls out with HP and with Symantec and neither were able to get to the bottom of it. HP shipped me two replacement drives but the result was the same. I can't see how the problem can be with Backup exec if itâ s also a problem with NT backup.

James.
tluggiero
Occasional Contributor

Re: DAT160 USB External not performing ANY hardware compression

I also have the DAT 160. In teh HP storageworks library tools, hardware compression is enabled. When I used XP Pro's backup at 73GB it made me change the tape. I would like to get full use of the 160gb tapes! I can't find a solution anywhere
Vernny
Advisor

Re: DAT160 USB External not performing ANY hardware compression

Hi Everybody,

James, in your first reply I saw that you we were trying to backup jpgs, mp3 files which they already come in ca compressed format and a storage device is not smart enough to compress it even more like in .zip, .rar, etc. For testing purposes, try running a long backup of Microsoft Office files, bmp, data bases, .txt, etc.

Also, verify your USB port settings in the Server. Depending of the technology it might be using a 1.0 USB Port when drives require 2.0.

You can try also with a regular workstation to test it.

Regards,
Vernny D.
Tom Maor
Occasional Visitor

Re: DAT160 USB External not performing ANY hardware compression

the thing also happen on my servers .
i'm using BE 11d . i have compression with the storage works but no compression with the BE . did you manage to solve this problem yet...?
Matthew Cutting
Occasional Advisor

Re: DAT160 USB External not performing ANY hardware compression

Hi Tom,

I have had no luck in rectifying this issue... Hopefully we can find something sooner than later...
Tom Maor
Occasional Visitor

Re: DAT160 USB External not performing ANY hardware compression

i'm trying to install the "HP data protector expres" to see if it's also havr the same problem , it's all by advisde from HP client support . i will tell u as soon as i'll insall this .
Tod Bauer
Occasional Visitor

Re: DAT160 USB External not performing ANY hardware compression

I have the same issue here as well. I just recently updated the USB drivers to the latest available. Backup Exec unfortunately does not provide drivers for this drive.

Running the tape tool shows that I can enable compression, and looking at the driver properties, I can see that compression is set to TRUE.

As soon as I start up Backup Exec, the value in the driver properties changes to FALSE. It appears that Backup Exec is shutting off compression.

Running the BE job with software compression does nothing either. It would appear that compression is not possible.
Tom Maor
Occasional Visitor

Re: DAT160 USB External not performing ANY hardware compression

so i guess the poblem is coming from the BE...? they say there in the wizard that the software does not support usb tapes . and that u should ask your tape vendor for the right drivers . so who should i call. it's comfusing
Jeff_nz
Occasional Visitor

Re: DAT160 USB External not performing ANY hardware compression

Same issue here, Running a DAT72 drive - (latest firmware and drivers) with HP Data Protector Express. - Backup job has hardware compression on and software compression off. I only get 1:1 (35-36GB), never any better. Data I'm backing up is very compressible.
Ran Library and tape tools, compression is on and the tape test got 2:1. So if it's not "hardware" and it is indeed software that is the issue, why is compression failing when I try NTBACKUP, HP DPX, and when others try BE 12.5? I doubt every piece of software is faulty. Is it a driver issue?



Gary J. Porter
Occasional Contributor

Re: DAT160 USB External not performing ANY hardware compression

We are also experiencing a similar problem.

H compression is on, S compression is off but we are still running out of tape space on an 80G tape.

Has anyone received a solution from HP?

Regards

Gary
Rob Leadbeater
Honored Contributor

Re: DAT160 USB External not performing ANY hardware compression

Hi Gary,

Please open your own thread. By all means reference this one if necessary.

That way you can assign points to replies if people solve your problem...

Cheers,

Rob
Gary J. Porter
Occasional Contributor

Re: DAT160 USB External not performing ANY hardware compression

At Rob's suggestion I have opened a new thread

Error 64: Not found became - Error 1401: Alert - Please insert compatible media

Please have a look if you found a solutions.

Regards

Gary
Sean F. Howell
Occasional Visitor

Re: DAT160 USB External not performing ANY hardware compression

I just got off the phone with HP Support.  First the technician told me to go buy another backup software package to test the drives compression, when I told him that would not happen then the technician told me it was not HP's problem.  If the HP L&TT compression test claims hardware compression then the hardware works and the software is not their problem, contact the manufacturer of the software.

 

I do not think I will be recommending HP anymore.  

Dennis Handly
Acclaimed Contributor

Re: DAT160 USB External not performing ANY hardware compression

>L&TT compression test claims hardware compression

 

As Vernny mentioned above, some data files can't be compress farther.  What type of data were you trying to backup?