wyman@athertn.Atherton.COM (Wyman Chong) (09/19/90)
Does anybody know if this is a bug? I am having problems trying to use dd and tar under either Ultrix 3.1D or 4.0 running on a DECStation 3100. When writing to the tape drive using tar everything is OK. However if I try the following: pluto:wyman{8}:tar cvf /dev/rmt0h good fdact.c a good 16 blocks a fdact.c 55 blocks pluto:wyman{12}:dd if=/dev/rmt0h | tar tvf - 4+0 records in 4+0 records out tar: blocksize = 4 rw-r--r-- 2150/0 8113 Aug 30 15:39 1990 good tar: Directory checksum error, possible file name: Atherton Technology. *------------------------------------------------------------------------ From the looks of it If I create a tape using tar I can extract it with tar However, if I extract it using dd I have problems. I was able to extract it using dd if I created it using dd. The reason I need dd is that I want to be able to do something like.... rsh tapemachine "dd if=/dev/rmt0h" | tar xvf - This used to work under 3.1 (I think) but does not seem to work under 3.1D or 4.0. This also works under SunOS. Any ideas? Wyman Chong Atherton Technology wyman@atherton.com {decwrl,sun}!athertn!wyman