Path: utzoo!attcan!uunet!lll-winken!lll-tis!helios.ee.lbl.gov!pasteur!ucbvax!NUSVM.BITNET!GBOPOLY1
From: GBOPOLY1@NUSVM.BITNET (fclim)
Newsgroups: comp.sys.apollo
Subject: re: domain/ix tar and /dev/rct8
Message-ID: <8809091305.AA20137@umix.cc.umich.edu>
Date: 9 Sep 88 12:46:09 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
Lines: 38
X-Unparsable-Date: Fri, 09 Sep 88 16:43:17 SST

sometimes the following works and sometimes it doesn't :
[hopes this is fixed in sr10]

     first you need to log on or crp on or telnet onto the node
that has the
cart drive.  then you must ensure that the tape is rewound.  use
"/com/rbak -dev ct -rewind".  now try "tar -f /dev/rct8 ...."

if the above doesn't work, i do
     log on node. (no need to rewind tape)
     /com/rwmt -dev ct -f 1 -rf f -unlab -r -raw -rl 512 -bl 512 file_1
     tar -f file_1 ...
if you have a few tarfiles on tape, then change -f 1 and file_1 to -f n
and file_n respectively.

another method is
     log on node and *rewind* tape
     dd if=/dev/rct8 | tar -f- ....


i found out that i cannot make tar tapes at sr9.7.  some guru told
me that i have to use a blocking factor of 1 (slllooooowwwww).  so
i do the following:
     tar -cvbf 1 file_1
     log on node. (no need to rewind tape)
     /com/rwmt -dev ct -f 1 -rf f -unlab -w -raw -rl 512 -bl 512 file_1


i also found out tapes make on non-apollo cart drives need not be
done with a bf of 1 (could still use default of 20), but apollo
cart drives must read and write at a bf of 1.

i hope this helps.  beaucomp of lucks.

fclim          --- gbopoly1 % nusvm.bitnet @ cunyvm.cuny.edu
computer centre
singapore polytechnic
dover road
singapore 0513.