home *** CD-ROM | disk | FTP | other *** search
- Path: sparky!uunet!charon.amdahl.com!amdahl!rtech!sgiblab!spool.mu.edu!howland.reston.ans.net!usc!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: 2 SYS disks vs. Standalone backup
- Date: 28 Jan 1993 01:35:33 GMT
- Organization: HST Wide Field/Planetary Camera
- Lines: 60
- Distribution: world
- Message-ID: <1k7d95INNn40@gap.caltech.edu>
- References: <C1IKw1.F75@nmrdc1.nmrdc.nnmc.navy.mil>
- Reply-To: carl@SOL1.GPS.CALTECH.EDU
- NNTP-Posting-Host: sol1.gps.caltech.edu
-
- In article <C1IKw1.F75@nmrdc1.nmrdc.nnmc.navy.mil>, dsc3pzp@nmrdc1.nmrdc.nnmc.navy.mil (Philip Perucci) writes:
- >The patient:
- > VAX 6410, 3 x 1Gb hard disks, 1 TK70.
- >
- >The problem:
- > Backups! Also, no money for 9-track or 8mm...
- >
- >Issue:
- > Backups need to be "idiot" proof, so operations personnel can run them.
- >The procedures should also be easy and reliable. Stand-alone backup on
- >TK70 is difficult/impossible to automate.
- >
- >Proposal:
- > Have 2 separate system disks. The 2nd system disk would be used ONLY for
- >backup of *main* system disk. The 2nd system disk would have a "captive"
- >account "backup" for, you guessed it, backup. The operator would boot the
- >2nd system disk, logon as "backup", follow prompts for swapping TK70s needed
- >to backup the *main* system disk, then re-boot the *main* system disk.
- >
- >Question:
- > Is proposal valid?
-
- It's valid, but unnecessary. You don't need to use two disks. Just make an
- account, BACKUP, on the normal system disk. Make it CAPTIVE, and have the
- procedure mount the necessary disks, and do the backups. Then teach your
- operator how to to a "MINIMUM" boot, log in as backup, then do a normal boot.
- You can even automate this. Something along the lines of:
- $ IF F$GETSYI("STARTUP_P1") .EQS. "MINI"
- $ THEN MCR SYSGEN
- USE CURRENT
- SET STARTUP_P1 DEFAULT
- WRITE CURRENT
- $ {mount the disks}
- $ {do the backups}
- $ @SYS$SYSTEM:SHUTDOWN 0 1 0 1 0 1 NONE
- $ ENDIF
- $ MCR SYSGEN
- USE CURRENT
- SET STARTUP_P1 "MINI"
- WRITE CURRENT
- $ @SYS$SYSTEM:SHUTDOWN 0 1 0 1 0 1 NONE
- for the captive procedure is what you're looking for. When the operator logs
- in as BACKUP, if the system's running normally, it sets it for a minimum boot
- and reboots. If the system's been booted minimum, it sets it to do a normal
- boot, mounts the disks, does the backups, and reboots.
-
- Thus, all the operator has to do is:
- 1) Log in as BACKUP;
- 2) Wait for the system to reboot;
- 3) Log in as BACKUP;
- 4) Load tapes as requested;
- When the backups are done, the system reboots normally.
- --------------------------------------------------------------------------------
- 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.
-