Re: Unix + SSA disk

"Nebojsa Petrovic" <nebacar_at_eunet.yu> wrote:

]This question is not exactly for Oracle DBA but maybe someone can help me.
]
]We have IBM R6000 model F40 and Unix (in one box with own power supply and
]UPS) with SSA disk (in another box with own power supply with common or
]other UPS)
]
]F40 and UPS communication with serial connection. If power failure is occur
]UPS shutdown the F40, but SSA disk stil work over until UPS have energy,
]and then stop (on the same way as power failure occur without UPS). If power
]failure occur relativly offten and long time UPS maybe crash.
]
]Is there anyway to resolve problem with SSA disk and UPS.
]

I think that you don't have a problem. The SSA's I have worked with have internal (lithium) batteries to backup their cache, and would have flushed that to disk within minutes of the F40 being shutdown by the UPS.

Since the F40 is down, and the cache in the SSA has been flushed, the power can cycle to the disks without affecting the data. It may cause physical problems though if it keeps happening of a period of time.

--

 ,-,_|\   George Dau,                                             __
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MIM Internet policy item 3.4 compliance - "I am clearly stating that any views or opinions expressed above do * NOT * necessarily represent the views or opinions of MIM." Received on Tue Nov 03 1998 - 15:12:13 CST