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тАО02-01-2008 09:01 AM
тАО02-01-2008 09:01 AM
DW027A and BackupExec 11d hardware compression
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тАО02-01-2008 09:03 AM
тАО02-01-2008 09:03 AM
Re: DW027A and BackupExec 11d hardware compression
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тАО02-01-2008 09:35 AM
тАО02-01-2008 09:35 AM
Re: DW027A and BackupExec 11d hardware compression
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тАО02-01-2008 06:25 PM
тАО02-01-2008 06:25 PM
Re: DW027A and BackupExec 11d hardware compression
Now I am seeing the following in the L&TT compression test:
! Before running this test, L&TT determined that your hardware compression algorithm is switched off.
! This was probably set by your backup software.
! L&TT has not altered your setup.
Backup Exec 11d diagnosic shows that [Compression Hardware] = 0x1
Any combination of confiurations with L&TT or Backup Exec (w/service restarts) has been tried. still getting 1:1 throughput.
Help!
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тАО02-03-2008 03:57 AM
тАО02-03-2008 03:57 AM
Re: DW027A and BackupExec 11d hardware compression
The level of compression that you'll get will depend entirely on the type of files that you're backing up, and whether they're already compressed.
For example, if you try to back up GIF images, or ZIP files, these are already compressed formats, so the tape drive won't be able to compress them further.
Hope this helps,
Regards,
Rob
P.S. You might want to close your other duplicate thread...
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тАО02-04-2008 07:30 AM
тАО02-04-2008 07:30 AM
Re: DW027A and BackupExec 11d hardware compression
A full backup to 1 DAT72 tape is 32GB and takes 4+ hours per tape. Compression is not enabled as the driver in device manager is displayed.
I've tried 3 re-installs of backup exec as it gives the option to use propietatry, windows, or the existing hp oem drivers. I am using 1.6.0.0 for the Tape Drives driver. In all cases, device managers driver info seems to be replaced when the backupexec service starts. the multitabbed driver information disapears and when the service is stopped reappears, at which time the tab for configuration shows: COMPRESSION=FALSE. However backupexec's diag always shows 0x1 for compression.