Path: 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

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.

-- 
-----------------------------------------------------------------------------
Darren G. Holloway	Systems Administrator	       GENIE Computer Systems
UUCP: calgary!xenlink!blender!genieho!{darren|root} REALTIME: +1 403 295 0418
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