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- Path: sparky!uunet!wupost!cs.utexas.edu!rutgers!cmcl2!acf3!zhangd
- From: zhangd@acf3.NYU.EDU (zhangd)
- Newsgroups: comp.unix.admin
- Subject: Hi, there:
- Message-ID: <61800001@acf3.NYU.EDU>
- Date: 3 Jan 93 23:23:00 GMT
- Sender: notes@cmcl2.nyu.edu (Notes Person)
- Organization: New York University
- Lines: 23
- Nntp-Posting-Host: acf3.nyu.edu
-
-
- Hi, there:
-
- When I am doing backup of a user filesystem at midnight, I prefer to umount the filesystem
- and then mount readonly thereafter. However, the filesystem is often unmountable
- because of "device busy" error! The point is somebody uses open files on it via NFS
- and I can't detect and close them all. Although I logout all current users on UNIX, those
- users on PC can still have open files via PC-NFS. I believe this is a quite common
- dilemma for most sysadmin.
-
- Questions:
- 1. how dangerous to backup a partition ( dump ) with some file opening on it?
- could this only corrupt those files or the whole filesystem in some special case?
-
- 2. if there is a way to find out all opening files on a partition and close them forcefully? ( mount, showmount...)
-
- 3. Could other backup commands ( like TAR ) handle this situation better?
-
-
- Thanks very much!
-
-
- James Han
-