jfh@killer.UUCP (John Haugh) (06/16/87)
We recently had to backup a file system over Ethernet using cpio and when dump(1)ing the system today, dump wanted to backup everything. I realize that this is because I told cpio to reset the access times on the files after saving them. Now for the questions. 1). Has anyone got a PD dump that is compatible with the old dump? - I like dump for a variety of reasons. I _don't_ want to switch to cpio or tar or dasflkjsd. 2). Has anyone got a PD cpio that knows how to read physical disks and thus not change any of the times in the inode? - I might use a program like this if I had the source or it understood all about multi-volume archives. (Read as: didn't ask for the name again) 3). Has anyone done anything remotely like any of this? I know this is coming on the back of alot of chatter about backups, but my poor operator is having a rough time. She needs your help :-) ... - John. (jfh@killer.UUCP) Disclaimer: No disclaimer. Whatcha gonna do, sue me?
john@xanth.UUCP (John Owens) (06/24/87)
In article <1007@killer.UUCP>, jfh@killer.UUCP (John Haugh) writes: > We recently had to backup a file system over Ethernet using cpio and when > dump(1)ing the system today, dump wanted to backup everything. I realize > that this is because I told cpio to reset the access times on the files > after saving them. Now for the questions. > 2). Has anyone got a PD cpio that knows how to read physical disks > and thus not change any of the times in the inode? If you umount the filesystem and remount it -r (read-only), the access times will not be updated. -- John Owens Old Dominion University - Norfolk, Virginia, USA john@ODU.EDU old arpa: john%odu.edu@RELAY.CS.NET +1 804 440 4529 old uucp: {seismo,harvard,sun,hoptoad}!xanth!john
haral@unisol.UUCP (Haral Tsitsivas) (06/25/87)
In article <1007@killer.UUCP> jfh@killer.UUCP (John Haugh) writes: >We recently had to backup a file system over Ethernet using cpio and when >dump(1)ing the system today, dump wanted to backup everything. I realize >that this is because I told cpio to reset the access times on the files >after saving them. Now for the questions. Ahemm.... There is no dump(1) but there is a dump(8). Actually, there is a dump(1) under System V but the manual entry says "dump selected parts of an object file" which does not seem to backup a filesystem. Dump(8) does not look at your last access time... It looks at the last modification time and the date of your last backup as defined in the file /etc/dumpdates. From the manual again: "Dump copies to magnetic tape all files changed after a certain date in the filesystem". "Files changed" does not refer to access times. If you want to reset dump's idea of the last backup time (presumably to the time of a backup done with cpio) edit the file /etc/dumpdates by hand and modify the last dump date. --Haral Tsitsivas UniSolutions Associates ...!seismo!scgvaxd!ashtate!unisol!haral (213) 641-6739