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- Newsgroups: comp.unix.admin
- Path: sparky!uunet!ulowell!swlvx2!NMC.ED.RAY.COM!heiser
- From: heiser@ferrari.nmc.ed.ray.com (Bill Heiser)
- Subject: multiple dumps on EXB-8200 8mm tape
- Message-ID: <1992Jul23.141833.14606@ferrari.nmc.ed.ray.com>
- Organization: Equipment Division, Raytheon Company
- Distribution: usa
- Date: Thu, 23 Jul 92 14:18:33 GMT
- Lines: 36
-
- I am attempting to develop backup procedures to write multiple files
- to a 2.3G 8mm tape. However my efforts are being thwarted by differences
- in the way different systems seem to write the tapes.
-
- I'm writing the procedures so that the script will run rdump from the
- machine being backed up, and write to a tape in a remote host. The other
- scenario will be to use dump to write to a local tape (to keep the procedure
- generic, is there any problem with using rdump also when writing to a local
- tape?)
-
- The problem I have is that when I write a tapefile to the non-rewinding
- device, and then write another file, when I try to read the files I seem
- to have to skip filemarks sometimes. For example: If I write a tape on
- a SunOS 4.1.1_U1 or 4.0.3 system, I have a tape with several tapefiles.
- If I try to read the tape by doing several consecutive 'restore' commands
- on the non-rewinding device, the restores after the first one fail -- unless
- I do a restore, then a "mt -f fsf 1". So basically I seem to be getting
- extra file marks!
-
- When I do the same exercise on a Harris Nighthawk CX/UX 5.1 (system V R3),
- this problem does not occur!
-
- Anyone know of a trick to make this work the same on both systems? I
- suppose if it is running on the Harris, I could make it write an extra
- file makr between files, but that seems foolish. It would be better if
- all of the tapefiles are back-to-back, both on sunos and cx/ux!
-
- Thanks in advance for any ideas on this.
-
- Bill
-
- --
- * Happiness is a hot boiled lobster with drawn butter, a side dish of hot *
- * fresh steamers with melted butter & a hot corn on the cob with butter & salt*
- Work: heiser@sud509.ed.ray.com
- Home: bill@unixland.natick.ma.us Public Access Unix/USENET 508-655-3848
-