Re: Modify the logical SYS$STARTUP, why or why not?

From: David J. Dachtera (djesys.nospam_at_NeOaSrPtAhMlNiOnWk.net)
Date: 01/14/04 

Date: Tue, 13 Jan 2004 21:26:14 -0600

John Brandon wrote:
>
> I just came across some changes to the logicals SYS$STARTUP in one of our
> remote sites. I would tend to think that this is not a good idea.
>
> Anyone else doing the same type changes?
>
> ANy other comments?
>
> $ show logical /full sys$startup
> "SYS$STARTUP" [exec] = "MYSTARTUP" (LNM$SYSTEM_TABLE)
> = "SYS$SYSROOT:[SYS$STARTUP]"
> = "SYS$MANAGER"
> 1 "MYSTARTUP" [exec] = "DISK2:[SYSCOMMON]" (LNM$SYSTEM_TABLE)
> 1 "SYS$MANAGER" [exec] = "SYS$SYSROOT:[SYSMGR]" (LNM$SYSTEM_TABLE)

Well, since SYS$STARTUP is DEFINEd in STARTUP.COM, any changes to it
would be likely to occur in SYLOGICALS.COM, unless an additional sin is
committed and STARTUP.COM is modified.

In the example, SYLOGICALS *IS* executed during a minimal boot. If DISK2
is not MOUNTed or DEFINEd until SYSTARTUP_VMS, the change would be
relatively harmless to an upgrade. Otherwise, there is some potential
for trouble. 

-- 
David J. Dachtera
dba DJE Systems
http://www.djesys.com/
Unofficial Affordable OpenVMS Home Page:
http://www.djesys.com/vms/soho/

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