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- Path: sparky!uunet!charon.amdahl.com!pacbell.com!ames!elroy.jpl.nasa.gov!nntp-server.caltech.edu!SOL1.GPS.CALTECH.EDU!CARL
- From: carl@SOL1.GPS.CALTECH.EDU (Carl J Lydick)
- Newsgroups: comp.os.vms
- Subject: Re: Wierd BACKUP change in VMS 5.5-2
- Date: 18 Nov 1992 03:05:15 GMT
- Organization: HST Wide Field/Planetary Camera
- Lines: 28
- Distribution: world
- Message-ID: <1ecbtbINNmki@gap.caltech.edu>
- References: <1992Nov17.203345.23090@aplcen.apl.jhu.edu>,<1992Nov17.141404.1@slacvx.slac.stanford.edu>
- Reply-To: carl@SOL1.GPS.CALTECH.EDU
- NNTP-Posting-Host: sol1.gps.caltech.edu
-
- In article <1992Nov17.141404.1@slacvx.slac.stanford.edu>, fairfield@slacvx.slac.stanford.edu writes:
- > Just curious, from which version of VMS did you upgrade to V5.5-2?
- >The reason I ask is that we are running V5.5-1 and I ran into essentially
- >the same problem: subprocess unable to access the drive allocated to the
- >parent (don't take me too literally, can't remember whether the drive
- >was mounted or just allocated...). This had nothing to do with BACKUP.
- >I just gave up without thinking much more about it :-(
-
- If memory serves, you've *NEVER* been able to mount a tape that was allocated
- to the parent of the current process. VMS v4.0 made some changes in the way
- tape mounting was done that allowed the tape to be shared among processes in a
- job. If I recall correctly, that version of VMS had a bug that caused the
- MOUNT to also allocate the tape (or maybe it changed the ownership of a tape
- allocated by the subprocess to ownership by the parent; it's been a long time
- since 4.0 and my memory's a bit fuzzy). Thus if one mounted a tape from a
- subprocess, then dismounted it, a subsequent attempt to mount it would fail.
-
- Now, someone else has posted something about another problem with BACKUP under
- v5.5-2 which indicates that the way BACKUP handles continuation tapes has
- changed. The problem currently under discussion is probably related.
- --------------------------------------------------------------------------------
- Carl J Lydick | INTERnet: CARL@SOL1.GPS.CALTECH.EDU | NSI/HEPnet: SOL1::CARL
-
- Disclaimer: Hey, I understand VAXen and VMS. That's what I get paid for. My
- understanding of astronomy is purely at the amateur level (or below). So
- unless what I'm saying is directly related to VAX/VMS, don't hold me or my
- organization responsible for it. If it IS related to VAX/VMS, you can try to
- hold me responsible for it, but my organization had nothing to do with it.
-