Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!usc!elroy.jpl.nasa.gov!ames!dftsrv!jagubox.gsfc.nasa.gov!jim From: jim@jagubox.gsfc.nasa.gov (Jim Jagielski) Newsgroups: comp.unix.aux Subject: Copying file systems Message-ID: <5438@dftsrv.gsfc.nasa.gov> Date: 28 May 91 10:27:58 GMT Sender: news@dftsrv.gsfc.nasa.gov Reply-To: jim@jagubox.gsfc.nasa.gov (Jim Jagielski) Organization: NASA/Goddard Space Flight Center Lines: 50 Many moons ago (well, a few then) there was a discussion here on c.u.a concerning the "best" way to copy entire file systems: tar, cpio, dump.bsd or whatever. I wrote that, IMHO, using tar didn't make sense, since it has trouble with special file types; using find and cpio required filtering out the mount point of the new file system to prevent copying copys. Now this isn't all that difficult, but it does add a level of complexity and it DOES change file time- stamps, which may not be such a good thing. I suggested that using dump.bsd and restore in a simple pipe was the way to go: $ dump.bsd -t 4.2 0uf - /dev/rdsk/cxdysz | (cd /mnt; restore -T 4.2 xf - ) Of course, you could dump to tape and then restore from it, but this takes much longer. Well, I just moved my A/UX system to 2 335 MB Wren Runners using the above method and I have a few observations to share: 1. This method, more specifically restore (I think) had trouble "copying" named pipes. In my configuration there were only 2 (lib/cron/FIFO and lpd/AppleTalk/pipe) and after the dump/restore I simply copied them over... restore said something about an "unknown mode 010xxx" where xxx was either 660 or 666. 2. All symbolic links were (re-)created with an owner and group of root. Of course, this really doesn't matter, since the owner, group and mode of a link doesn't mean all that much, but it still is a change over what the file-system looked like before... Everything else went off without a hitch... Oh yeah, by the way. The correct /etc/disktab entry for the 335MB Wren Runner (ST 4385D, 385H: 94181-385) is: # Wren 4385 # WR385|Runner|ST4385:\ :ty=winchester:ns#56:nt#15:nc#791: At least, that's what the Seagate spec-sheet says :) -- =========================================================================== #include =:^) Jim Jagielski NASA/GSFC, Code 711.4 jim@jagubox.gsfc.nasa.gov Greenbelt, MD 20771 "If we increase the size of the penguin until it is the same height as a man and then compare the relative brain size, we know find that the penguin's brain is still smaller. But, and this is the point, it is larger than it WAS!"