SUMMARY: Archive Python 4mm dump density and length for SunOS 4.1.3

From: tims@tfb.com
Date: Fri Jan 07 2000 - 15:08:03 CST


The correct answer was to bring the system down to single user mode and
remove the "v"erify from the command line. The verify still failed in single
user mode but I was able to restore files from the tape. Thank you for the
quick response.

-----Original Message-----
Sent: Friday, January 07, 2000 8:24 AM
To: 'sun managers'
Subject: Archive Python 4mm dump density and length for SunOS 4.1.3

Does anyone have the correct values for density and length to make dump work
properly under SunOS 4.1.3. I am using a 4mm Archive Python (Conner model #
CTD8000R-S) and 3M imation 4mm DDS-90 data tape. The tape is capable of 2G
or 4G compressed. using the command
"dump 0dsfuv 42500 1000 /dev/rst0 /dev/sd2c" produces the following output.

DUMP: Date of this level 0 dump: Fri Jan 7 08:15:27 2000
  DUMP: Date of last level 0 dump: the epoch
  DUMP: Dumping /dev/sd2c to /dev/rst0
  DUMP: mapping (Pass I) [regular files]
  DUMP: mapping (Pass II) [directories]
  DUMP: estimated 188200 blocks (91.89MB) on 0.48 tape(s).
  DUMP: dumping (Pass III) [directories]
  DUMP: dumping (Pass IV) [regular files]
  DUMP: level 0 dump on Fri Jan 7 08:15:27 2000
  DUMP: Tape rewinding
  DUMP: Finished writing last dump volume
  DUMP: Starting verify pass
  DUMP: Tape verification error 31 feet into tape 1
  DUMP: NEEDS ATTENTION: Do you want to rewrite?: ("yes" or "no")

The dump completes but the verification always fails. I have tried different
tapes and values for the length and density and the only thing that change's
is how many feet into the verification dump fails.



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