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11-29-2001 10:10 PM
11-29-2001 10:10 PM
SureStore DAT24 Hardware Compression?
I'm trying to use the hardware compression feature of my tape drive. I've tried enabling it in the NTBackup GUI and from the command line. I've done several tests and the tape rewinds when it hits 12GB. The documentation for the tape drive says that it supports hardware compression. I've downloaded every manual, users guide, etc. from hp's website and I haven't found any info on enabling the hardware compression feature. I thought that there might be a jumper that needs to be set, but I can't find any info on the jumpers on the tape drive except those for setting the SCSI ID. Any help would be much appreciated.
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11-30-2001 03:37 AM
11-30-2001 03:37 AM
Re: SureStore DAT24 Hardware Compression?
Hardware compression is factory set to be on so you should not need to change any settings - have you checked the type of files that you are backing up? If you use Exchange or have a lot of pre-compressed files e.g. *.zip, *.gif/tif/jpg/bmp etc then this will greatly effect the compression ratio.
If you have a lot of these type of files then this may be the fault if not try running HP Library and Tapetools compression test you can get this program from here http://www.hp.com/cposupport/information_storage/software/ltt_27_eng.exe.html
Hope this helps
Regards
Emma
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02-11-2002 08:22 AM
02-11-2002 08:22 AM
Re: SureStore DAT24 Hardware Compression?
[-] The test function encountered an unrecoverable error condition, the test failed.
[-] SCSIScript: auto abort triggered (Line: 157, Error: Auto abort triggered)
[-] I/O Exception (Error: 2408 - I/O: An unexpected Win32 error has been reported)
SCSI Cmd I/O at 2/0.1.0: Read
I am running Windows 2000. The SCSI adapter is an Adaptec AIC-7850. The Connectivity & Device Self Tests complete successfully. The backups are fine but not compressed. Any thoughts?
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02-22-2002 12:36 AM
02-22-2002 12:36 AM
Re: SureStore DAT24 Hardware Compression?
i've the same probleem with a dat 4/8Gb device
only this run on netware
the file i back up are mostly word and excel files
before the 4gb it askes for a new tape
compression is default on and the tapes are comressed formatted
What to do, by a new streamer with a higher capacity
the compression seems only to work with some rules in mind, but if to realy have to backup these files ?
With regards
Dave
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02-22-2002 01:53 PM
02-22-2002 01:53 PM
Re: SureStore DAT24 Hardware Compression?
Were you using a DDS2 tape or a DDS3 tape?
The compression test worked fine for us on a DAT24 drive when we used a DDS3 tape.
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03-11-2002 09:16 AM
03-11-2002 09:16 AM
Re: SureStore DAT24 Hardware Compression?
I have a Surestore 40 hooked up to a mac and it too seems to be ignoring hardware compression.
What's worse, I can't seem to find any mac based diagnostic programs to test for unit failure.
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03-14-2002 12:18 AM
03-14-2002 12:18 AM
Re: SureStore DAT24 Hardware Compression?
HP SureStore DAT24i hardware compression does not work.
My Environment:
- Windows 2000 Professional SP2
- BackupExec 8.5 Rev. 3572
- Adaptec AIC-7899 Ultra160 SCSI controller
What I've done:
- I've updated the tape's firmware
- I've tried using the Windows 2000 tape drivers
- I've tried using the HP tape drivers
- I've tried using the BackupExec tape drivers
- I've tried Microsoft Windows Backup 5.0
- I've testet the tape using HP Library & Tape Tools 2.7 SR4 (all OK)
- I've checked the DIP switches (all default, 1 & 2 on)
- I'm using DDS3 tape with MRS
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04-12-2002 08:00 AM
04-12-2002 08:00 AM
Re: SureStore DAT24 Hardware Compression?
I am running Win2K with BE 8.5 rev 3572 in a Compaq Proliant ML370.
The tapes are new DDS3's
All drivers and service packs are up to date.
Fustrated.
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04-12-2002 09:00 AM
04-12-2002 09:00 AM
Re: SureStore DAT24 Hardware Compression?
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04-15-2002 05:15 AM
04-15-2002 05:15 AM
Re: SureStore DAT24 Hardware Compression?
As martin Duqas stated - He turned switch nr 2=off. I have switch number 2=on and HTT states that compression i diabled! Did Martin in fact turned compression=on?
This turnaround of switch settings have occured before.
//Patrik
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11-24-2003 02:14 PM
11-24-2003 02:14 PM