Περί UPS

Stavros Giannouris stavrosg at hellug.gr
Wed Nov 14 11:25:19 EET 2007


On (14/11/07 11:02), Dimitris Stasinopoulos wrote:
> On Wednesday 14 November 2007 10:42, Christos Ricudis wrote:
> > 
> > 
> > Consider the following scenario :
> > 
> > 
> > 10:50     Peftei to reyma. To UPS ypologizei basei tou trexontos fortiou
> >           oti exei sth dia8esh tou 20 lepta prin tou teleiwsei h mpataria.
> > 
> > 10:60     To UPS leei ston kompioytora, "Eimai sto 50% capacity. Kane
> >           shutdown TWRA"
> > 
> > 10:62     O kompioutoras exei kanei shutdown.
> > 
> > 10:65     Epanerxetai to reyma. To UPS leei "a, ola yperoxa", kai stamataei
> >           na gkriniazei. Ki o kompioutoras exei meinei me to pouli sto 
> > xeri,
> >           giati den exei kanena tropo na ksanaksekinhsei an den tou kopsei
> >           kapoios to reyma.
> > 
> > H lysh?
> > 
> > Apaks kai ena mhxanhma apofasisei na kanei shutdown, TO UPS PREPEI
> > OPWSDHPOTE NA TOU KOPSEI TO REYMA, estw kai gia ligo.
> > 
> > Opoios mou pei giati to problhma de mporei na ly8ei me eksypnades tou styl
> > "mporoume na xrhsimopoihsoume to Wake-on-Lan", kerdizei mpiskoto.
> > 
> 
> Τι σε σταματάει από το να να μην κάνεις poweroff όταν καλείς init[6] μέσω του shutdown script;

Ότι στο πιο πάνω σενάριο κατά πάσα πιθανότητα ούτε έτσι δεν θα προλάβει
να εξαντληθεί η μπαταρία του UPS, οπότε πάλι χρειάζεσαι κάποιον να πάει
να πατήσει ένα κουμπάκι εκεί;

Σ.
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