Re: hardware commpression in ntbackup 2000 server
From: Bjorn Landemoo (mvp2.REMOVE_at_landemoo.com)
Date: 09/16/04
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Date: Thu, 16 Sep 2004 23:34:43 +0200
Pawel
This is not a general problem with NT Backup in Win2000, as it usually
works. There isn't anything in MSKB about this issue, either.
It might be a hardware/firmware problem, have you checked with your
hardware vendor?
I suppose that you are backing up compressible files. If they already are
compressed, hardware compression will not be able to compress them further.
Normally, you get a compression factor 1.2 to 1.4, meaning 24 to 28 GB on a
tape. 40GB is only sales talk. This wouldn't disable the compression state
in NT Backup, though.
Best regards
Bjorn
-- Bjorn Landemoo - mvp2@landemoo.com - http://landemoo.com/ Microsoft MVP (Windows Server - File System) "sztefek" <sztefek@hotmail.com> wrote: >Yes hardware commpression is activated. >I checked compresion status by software. >When compresion is enabled and ntbackup is set compresion status changed to >disabled. I can write no more than 20GB (not 40GB) on one DDS4 tape. > >This problem doesn't exist in ntbackup in windows 2003 server. Testing >software always shows enable compresion status. > >Thanks >Pawel > > >Uzytkownik "Bjorn Landemoo" <mvp2.REMOVE@landemoo.com> napisal w wiadomosci >news:q8ojk0hvai9jfdmlgnkqgh822qdkb9gtah@4ax.com... >> Pawel >> >> Is hardware compression activated on your tape drive? Usually, there is a >> jumper or mini-switch to enable compression. >> >> The option in NT Backup will only work if your hardware does the >> compression, as there is no software compression in the product. >> >> Best regards >> >> Bjorn >> -- >> Bjorn Landemoo - mvp2@landemoo.com - http://landemoo.com/ >> Microsoft MVP (Windows Server - File System) >> >> "sztefek" <sztefek@hotmail.com> wrote: >> >> >Why NTbackup switches off hardware compression on DDS4 tape drive? I use >> >windows 2000 serwer. >> >How to enable hardware compression when ntbackup works? >> > >> >Thanks for help >> > >> >Pawel >> > >> >
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