U233A@wvnvm.wvnet.edu (05/24/91)
What ramifications are there in backing up the system while users are still logged on? In addition, we do not unmount the filesystems prior to the backup executing. It appears that under both of those circumstances, the filesystems are being backed up ok. I havn't had any problems so far in restoring files that were backed up under these conditions. I'd be glad for advice. Thanks---/tony
merrick@magnus.acs.ohio-state.edu (Tom Merrick) (05/24/91)
In article <91143.132238U233A@wvnvm.wvnet.edu> <U233A@wvnvm.wvnet.edu> writes: > What ramifications are there in backing up the system >while users are still logged on? In addition, we do not >unmount the filesystems prior to the backup executing. >It appears that under both of those circumstances, the filesystems >are being backed up ok. I havn't had any problems so far in >restoring files that were backed up under these conditions. > >I'd be glad for advice. Thanks---/tony You could conceivably lose a large amount of data if you backup by inode. This would happen if the subdirectory was being modified while the backup process was going on. If this subdirectory is corrupted, then all of the files under it would be unaccessible. I tend to do a backup of each file system by name using the following command: cd /usr && find . -xdev -print | backup -iqpf /dev/rmt0.x So if a file is being modified during the backup, that file is lost and not the rest of the files in the subdirectory. Tom Merrick Ohio State University
rbraun@spdcc.COM (Rich Braun) (05/24/91)
I use a script which pipes the output of find into cpio, but I'm concerned about my ability to restore files in the event of a catastrophic disk failure. Suppose the root filesystem gets trashed; can I bring the system back up from a tape produced in this way? My system came pre-loaded. How do I construct a bootable floppy which can be used for booting if the system fails? (I would RTFM, but IBM has a policy of handing out manuals on disk rather than on paper. In the event of a catastropic failure, my manuals would therefore be unavailable, unless I had some way of fishing them off a tape under a non-IBM operating system.) -rich
scott@prism.gatech.EDU (Scott Holt) (05/24/91)
In article <7627@spdcc.SPDCC.COM> rbraun@spdcc.COM (Rich Braun) writes:
!I use a script which pipes the output of find into cpio, but I'm concerned
!about my ability to restore files in the event of a catastrophic disk
!failure. Suppose the root filesystem gets trashed; can I bring the system
!back up from a tape produced in this way?
No, but you can reinstall the system from a tape made with the backup
command - or with the backup system option from "smit startup.
!
!My system came pre-loaded. How do I construct a bootable floppy which can
!be used for booting if the system fails? (I would RTFM, but IBM has a
!policy of handing out manuals on disk rather than on paper. In the event
!of a catastropic failure, my manuals would therefore be unavailable,
!unless I had some way of fishing them off a tape under a non-IBM operating
!system.)
Well, in this case, the procedure is in TFPM (The F Printed Manual) - its in
the AIX Installation Guide. This guide should be Operators Information binder.
Also, the 3003 patch set includes a set of boot disks.
-Scott
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