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Date:      Mon, 19 Aug 1996 12:24:26 -0500 (CDT)
From:      David Brockus <>
Subject:   Problems with dump
Message-ID:  <>

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I am using a Sony SDK-5200M tape drive on a FreeBSD 2.1.5 system with an
Adaptec 2940.  I am having problems finding the correct density and length
settings.  I am using DDS-1 90m tapes.  I am using a length value of 295
ft. I found the 'Linear recording density' in the manual for the tape
drive(61000 BPI).  Here is what happens when I use dump with those values.

cyber1# dump 0ufds /dev/nrst0 61000 295 /usr
  DUMP: Date of this level 0 dump: Mon Aug 19 12:07:04 1996
  DUMP: Date of last level 0 dump: the epoch
  DUMP: Dumping /dev/rsd0s1f (/usr) to /dev/nrst0
  DUMP: mapping (Pass I) [regular files]
  DUMP: mapping (Pass II) [directories]
  DUMP: estimated 198158 tape blocks on 2.16 tape(s).
  DUMP: dumping (Pass III) [directories]
  DUMP: dumping (Pass IV) [regular files]

The tape is suppose to store 2GB native and 4GB w/compression.  What am I
doing wrong?  Am I using the wrong units of measure?  I checked the man
page and a section in a book on 4.4BSD,  I thought that this was the 
correct usage.

Any suggestions would be greatly appreciated.

David Brockus

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