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- Path: sparky!uunet!elroy.jpl.nasa.gov!usc!news.service.uci.edu!unogate!mvb.saic.com!tgv.com!info-multinet
- Date: 10 SEP 92 17:56:06 GMT
- Newsgroups: vmsnet.networks.tcp-ip.multinet
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- X-RFC822-From: adelman (Kenneth Adelman) @ TGV.COM
- From: adelman@TGV.COM
- Subject: Re: Ultrix backups.
- Organization: The INFO-MULTINET Community
- Message-ID: <42E00D2910SEP92175606@TGV.COM>
- Nntp-Posting-Host: Mvb.Saic.Com
- Lines: 32
-
- > >We have ultrix 5000/240 workstations with no tapes, and vms 5.5 vax
- > >4000/500 with 5f85 and Multinet 3.1 . We have learned to NFS file share
- > >and printer share, and are ready for the lesson on what to do to back up
- > >the Ultrix machines onto vms TF85 tape. Incidentally it is a FAST tape
- > >drive, a real thrill to use.
-
- > Although I suspect it's a bit Rube Goldbergish I use dump to backup
- > file systems on Ultrix/Bugtrix to NFS mounted disks on my VAXCluster
- > running TGV MULTINET. The dumps then go out to tape with VMS BACKUP.
- > COPY has record length problems. It works.
-
- The problem with this scheme is that it results in a loss of
- certain properties of files. In particular, if a file is owned by a
- group which is not the group that you've got a user mapped to in
- MULTINET CONFIGURE/NFS, the information about which group it is owned
- by is lost when you copy it to the VMS NFS Server and back. Also, if
- a file has "holes" in it (areas which were never written) these holes
- get filled in with zeros and when the file is restored, although it
- will appear the same, it will take more disk space.
-
- The second problem is that most people would rather have UNIX backups
- in a UNIX format and VMS backups in a VMS format. The reason for this
- is so that "X" years from now if you don't have one of these machines
- you won't be unable to restore files from your backups of the other.
-
- > I've never heard of tapes being defined as an NFS mounted object.
- > MSCP has the same problem in VMS; no tapes.
-
- The RMT Server does this.
-
- Ken
-