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Old 14th July 2008
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graudeejs graudeejs is offline
Real Name: Aldis Berjoza
ISO Quartermaster
 
Join Date: Jul 2008
Location: Riga, Latvia
Posts: 589
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if you won't include -a flat, dmup will calculate some tabe blocks or something, and write only as much as these can be filles (whic is very small), and then ask to dumb question... i don't remember what exactly....

Code:
     -a      ``auto-size''.  Bypass all tape length considerations, and
	     enforce writing until an end-of-media indication is returned.
	     This fits best for most modern tape drives.  Use of this option
	     is particularly recommended when appending to an existing tape,
	     or using a tape drive with hardware compression (where you can
	     never be sure about the compression ratio).

Whit -a dump will write as long as there is space on disk. or dump is ended.....
and there won't be problems.....
I did it many times....

to restore dump you need to format slice (newfs /dev/slice or newfs -U /dev/slice), then mount it, ch into mount point, and restore -rf /path/to/dumpfile
or bzcat /pat/to/dumpfile.bz2 | restore -rf -
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