Article View: comp.sys.ibm.pc.rt
Article #552Re: Can 6157-002 tape drive be forced t
From: Darren Holloway
Date: Thu, 09 Nov 1989 22:47
Date: Thu, 09 Nov 1989 22:47
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1495 bytes
In article <213600004@s.cs.uiuc.edu>, silver@s.cs.uiuc.edu writes:
>
> Re: 6157-002 tape drives being slow
>
> Yes, I agree they aren't speed-demons, but I have obtained a tremendous
> speedup with buffering. The daily backups we make (5-8Meg) take
> only 4-5 minutes. The fulldumps (200+Meg) take only 75-80 minutes.
> That's not including the time to switch between the 4 tapes it requires.
You can get about 10-20% more speed than -C2000 by using "dd", as such:
To do a backup:
li -Ra /u | backup -ivr -f - -C30 | dd of=/dev/rmt0 bs=30b
To do a restore:
dd if=/dev/rmt0 bs=30b | restore -xv -f - -C30
However, I have heard that it is possible to lose your end-of-tape markers
while doing this...You will have to try it yourself and decide.
--
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Darren G. Holloway Systems Administrator GENIE Computer Systems
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!cs.utexas.edu!rice!uw-beaver!ubc-cs!alberta!calgary!xenlink!blender!genieho!darren From: darren@genieho.UUCP (Darren Holloway) Newsgroups: comp.sys.ibm.pc.rt Subject: Re: Can 6157-002 tape drive be forced t Summary: Even faster way Message-ID: <3@genieho.UUCP> Date: 9 Nov 89 22:47:59 GMT References: <3425@nmtsun.nmt.edu> <213600004@s.cs.uiuc.edu> Lines: 25