Re: [Dump-users] RE: Dump HOWTO

[Bernhard E. <be...@be...>]

Stelian Pop wrote:
[...]
> Use the no rewinding tape device (such as /dev/nst0) and:
> 
>         mt -f /dev/nst0 rewind
>         dump 0f /dev/nst0 /dev/sda1
>         dump 0f /dev/nst0 /dev/sda2
>         dump 0f /dev/nst0 /dev/sda3
>         mt -f /dev/nst0 rewind

I've seen really ugly things dumping directly to DDS-2 drives on several
different boxes. (DDS-3 seems to be ok.) I have to use dd to write at
fixed block sizes:
dump 0af - /dev/sda1 | dd obs=32k of=$TAPE

# /sbin/dump 0a /tmp/
  DUMP: Date of this level 0 dump: Tue Jun 27 10:24:36 2000
  DUMP: Date of last level 0 dump: the epoch
  DUMP: Dumping /dev/hdb11 (/tmp) to /dev/nst0
  DUMP: Label: none
  DUMP: mapping (Pass I) [regular files]
  DUMP: mapping (Pass II) [directories]
  DUMP: estimated 57046 tape blocks.
  DUMP: Volume 1 started at: Tue Jun 27 10:24:37 2000
  DUMP: dumping (Pass III) [directories]
  DUMP: dumping (Pass IV) [regular files]
  DUMP: Closing /dev/nst0
  DUMP: Volume 1 completed at: Tue Jun 27 10:26:31 2000
  DUMP: Volume 1 took 0:01:54
  DUMP: Volume 1 transfer rate: 500 KB/s
  DUMP: 57034 tape blocks (55.70MB) on 1 volume(s)
  DUMP: finished in 112 seconds, throughput 509 KBytes/sec
  DUMP: Date of this level 0 dump: Tue Jun 27 10:24:36 2000
  DUMP: Date this dump completed:  Tue Jun 27 10:26:31 2000
  DUMP: Average transfer rate: 500 KB/s
  DUMP: DUMP IS DONE
# mt rewind
# /sbin/restore r
. is not on the tape
Root directory is not on tape
abort? [yn] y
dump core? [yn] n


"dd bs=32k..." (ibs=obs) didn't work for me, I have to use "obs=32k".