🚀 go-pugleaf

In article <4t4otv$4bo@duke.telepac.pt>, Henrique Martins
<hjrm@mail.telepac.pt> writes
>Hi everyone.
>
>I would like to here how important is to have similar mirror servers
>for Novell 3.12 SFT III and 4.0 SFT III.
>
I can only speak abuot SFTIII 4.1 as I don't have experience with SFTIII
3.11.


>I think that if we have equal machines it is not so safe because it
>oftem happens that if a board has a problem, many others, of the same
>batch, may well have the same problem.
>
>On the other side, of couse, on there is no problem in one maybe there
>is no batch problem and both will be OK.
>
>This apply to any peace of hardware, including disks.
>
>If mirror servers are different we will have more chances of having
>one problem but, maybe, not the same one in the other machine. But
>them how confused will SFT III be ?
>

In theory, the two servers comprising an SFT system can have different
hardware, even different processor speeds. However, my feeling is that
if you play "mix-n-match" with the two servers the maintenance is going
to be a nightmare. When the two are identical it's easy to keep drivers
etc. in step.

Also, by having differing hardware on both sides you increase the
potential for problems.

Graham
-- 
Graham Glen     graham@irving.demon.co.uk       
".. and it always was possible to measure the distance between so-called
management and the so-called creative by the time it took for a memo to go
in one direction and a half-brick to come back in the other."
        Dennis Potter

hjrm@mail.telepac.pt (Henrique Martins) wrote:

>Hi everyone.

>I would like to here how important is to have similar mirror servers
>for Novell 3.12 SFT III and 4.0 SFT III.

>I think that if we have equal machines it is not so safe because it
>oftem happens that if a board has a problem, many others, of the same
>batch, may well have the same problem.

>On the other side, of couse, on there is no problem in one maybe there
>is no batch problem and both will be OK.

>This apply to any peace of hardware, including disks.

>If mirror servers are different we will have more chances of having
>one problem but, maybe, not the same one in the other machine. But
>them how confused will SFT III be ?

>Please send your comments.
>Thank you

It's very important, the servers have been equal 150%.
we had eproblems with SFTIII cause the BIOS of the Compaq DISKS was
not equal!!!!

Ohh poor people.

I remember when VAX-clusters got available. (You did'nt have
a cluster to increase relability 'cause those vax'es never crached).

Clusters could consist of *ANY* vaxes, the only thing
was that VMS releases was recommended to be one or two steps
apart.

And clusters consisted of *any* vaxes. And they worked. And this
happened (for me) at 1986 . Some clusters are still alive since
then, the cluster never dies, but the members are all exchanged.

So i have one (nasty) question:
Why should i consider novell sft when they seems to
be more then 10 years behind ??? 



Marc Knecht (marc.knecht@hitline.ch) wrote:
: hjrm@mail.telepac.pt (Henrique Martins) wrote:

: >Hi everyone.

: >I would like to here how important is to have similar mirror servers
: >for Novell 3.12 SFT III and 4.0 SFT III.

: >I think that if we have equal machines it is not so safe because it
: >oftem happens that if a board has a problem, many others, of the same
: >batch, may well have the same problem.

: >On the other side, of couse, on there is no problem in one maybe there
: >is no batch problem and both will be OK.

: >This apply to any peace of hardware, including disks.

: >If mirror servers are different we will have more chances of having
: >one problem but, maybe, not the same one in the other machine. But
: >them how confused will SFT III be ?

: >Please send your comments.
: >Thank you

: It's very important, the servers have been equal 150%.
: we had eproblems with SFTIII cause the BIOS of the Compaq DISKS was
: not equal!!!!




--
--
Peter Hakanson  VolvoData Dep 2580 phone +46 31 66 74 27

I have only had sucess with SFT-III on *identical* servers.  Same
brand, model, configuration.....everything.

Dean.

hjrm@mail.telepac.pt (Henrique Martins) wrote:

>I would like to here how important is to have similar mirror servers
>for Novell 3.12 SFT III and 4.0 SFT III.

In SFT you want exactly identical systems as far as RAM, HD space,
controllers and motherboard (processor) go.  The best is to get twin
machines, with one having a tape backup.

As far as having the same problem from a bad board in the same lot in
each system, don't buy cheap crap and it won't happen.  If you're
going SFT go for HP, Compaq or the like.  A close second would be AST,
ALR or Dell servers.

Jeff