govern (12/03/82)
I have a VAX 11/780 with USG UNIX Ver. 4.2 (~~ 4.0). Something is corrupted that prevents me from mounting or unmounting the /dev/rp1 file system which contains /usr. The files are all there, so it at least ACTS mounted. I have another file system on /dev/rp4, which I would like to mount on /usr/ipws, but can't. (It mounts fine on /bck.) In both cases I get "device busy" errors when I try to mount or umount. Changing /etc/mnttab hasn't helped, although maybe I've missed something? HELP!! Thanks; Bill Stewart BTL-WB 201-870-7699 (After 2:30 Friday) houxn!hoscf!wcs, or ucbvax!ihnss!hoscf!wcs or decvax!harpo!hoscf!wcs
roediger.ANL-MCS@SRI-UNIX@sri-unix (12/15/82)
From: roediger.ANL-MCS at SRI-UNIX (Gary &) Date: 10 Dec 1982 09:44:47-PST The accounting file is probably being used. Try turning the accounting off first; then umount it. Gary Roediger ucbvax!anlams!roediger roediger@ANL-MCS
Michael.Young.CMU-CS-A@SRI-UNIX@sri-unix (12/15/82)
From: Michael Wayne Young <Michael.Young.CMU-CS-A@SRI-UNIX> Date: 9 December 1982 1408-EST (Thursday) Often mount/unmount is impossible because some process's current directory is on that filesystem or some file is open there. I know of at least one kernel that "revokes" access to files on a structure if you try to dismount it, but I don't think it tries to get rid of processes whose current directory is on it (as that's harder to decide what to do). You might want to see if some process that's always running that is stopping you up. Does your flavour of Unix allow mounts on top of already mounted systems? [I'm unfamiliar with the USG-related ones.] That might be a no-no entirely. Otherwise, I can't tell why you wouldn't be able to handle mounting on /usr/foo. Michael