Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!usc!apple!agate!shelby!portia.stanford.edu!elaine21.stanford.edu!dhinds
From: dhinds@elaine21.stanford.edu (David Hinds)
Newsgroups: comp.sys.sgi
Subject: Re: Question bru-ing again!!
Message-ID: <1991Feb13.061746.21283@portia.Stanford.EDU>
Date: 13 Feb 91 06:17:46 GMT
References: <9102122035.AA22599@igor.tamri.com> <1991Feb13.043605.17095@odin.corp.sgi.com>
Sender: news@portia.Stanford.EDU (Mr News)
Organization: Stanford University - AIR
Lines: 26

In article <1991Feb13.043605.17095@odin.corp.sgi.com> olson@anchor.esd.sgi.com (Dave Olson) writes:
>In <9102122035.AA22599@igor.tamri.com> sissi@IGOR.TAMRI.COM (Sissi Tchehrazi) writes:
>| 	
>| 		mt fsf (advances my 8mm tape one file)
>| 			at this point I will like to write a new file
>| 		bru -cvf /dev/nrtape (8mm is linked to tape size=0K ..)
>| 				result:
>| 		bru: Warrning Input/Output Error
>| 		bru: load volume 1 and enter ....
>
>Because while 8mm drives can append at any FM, it has to be on the
>BOT side of the FM.  So you have to do mt fsf 1, mt bsf 1, if I
>remember correctly.  Remember that the new EOD is where you stop
>writing, you can't just overwrite part of the data.
>
>mt feom takes care of getting you on the correct side of the FM;
>I'm not sure right now if we made the append at any filemark work in 3.2 or
>3.3, or perhaps not till 4.0

I don't think this is right.  I'm pretty sure the 8mm drives can't back
up except when rewinding, so "mt bsf 1" won't work.  "mt feom" puts you at
EOD, which has to be on the far side of whatever other marks are put down
at the end of a file.

 -David Hinds
  dhinds@cb-iris.stanford.edu