HP3000-L Archives

November 1998, Week 1

HP3000-L@RAVEN.UTC.EDU

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From:
Sletten Kenneth W <[log in to unmask]>
Reply To:
Sletten Kenneth W <[log in to unmask]>
Date:
Fri, 6 Nov 1998 14:37:10 -0800
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Stan suggested:

> ....  ability to specify a default volume set for an account ...
> it ought to be part of the    :ALTACCT command!)

This is a really good idea;  it's clearly the "failsafe" solution for
both end-user *and* third-party vendor accounts....  and not just
:ALTACCT but also of course  :NEWACCT.   I hope SIGMPE will
add it to the enhancement list....  seems like it would be another
ideal candidate for the CFE program....

As HP 3000's keep getting bigger and faster, I would think the
ability to efficiently manage multiple volume sets would move
higher on the priority list for more and more user sites....

> So...you might choose to put important packages (like HourGlass,
> SPLash! and the Lund Toolboxes) on the system volume
> set (MPEXL_SYSTEM_VOLUME_SET), ......

> Note the smiley!

Lucky you added that last note, Stan.....     ;-)

...  unfortunately, if you put them on the <long_name>, then you
cannot have the reliability of Mirroring those important accounts
(that's right:  After 3+ years or more of agitating for being able to
mirror the SYS_VOL, I still have not given up....).

...  and unless and until we *do* get the ability to mirror SYS_VOL,
there is another big advantage to keeping the number of MBytes on
that volume set as small as possible:  If you have enough spindles
in the <long_name> that the total capacity of well over one disc is
"surplus", then you can recover very quickly from a one-spindle
failure in the volume set.  Here's how:

(1)  Be sure you keep one or more good full system backup(s)
readily available...  I'm paranoid;  I like to have two that have
passed CHECKSLT and VSTORE....

(2)  Shut down and power down the system.

(3)  Open up the box and take out the bad spindle (assuming
you can figure out which one it is (and assuming you are willing
to take the responsibility for "do it yourself hardware surgery" on
your machine) ).

(4)  Power up and do an INSTALL.  Note we did this once on our
machine when Predictive said a disc was going south.  Once we
were powered up, the INSTALL only took about 15 minutes.  Then
bring up the user volumes again...  Back in business without having
to wait 4+ hours or maybe until next day for HP hardware support...

Ken Sletten

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