SATA Raid

[Dave Cramer]

Personally, as I said, my data is worth way more than the hardware it  
is residing on. This is why I buy high quality RAID cards, with BBU,  
and hot swap drives. This is proven technology, and the code base is  
much smaller than the kernel. The point being that there are less  
failure paths.

In the end it's your choice. I've made mine.

Dave
On 19-Jun-06, at 12:05 PM, Lennart Sorensen wrote:

> On Mon, Jun 19, 2006 at 03:27:52PM +0000, Christopher Browne wrote:
>> The on-card BBU does not need to depend on the entire chain:
>>  UPS -->
>>      Power Cable -->
>>         PSU -->
>>            Motherboard -->
>>               CPU, RAM, ...
>>
>> It shortens the chain to:
>>  Battery --> RAID Cache
>>
>> The failure of *any* of the components in the first chain will  
>> corrupt
>> the filesystem.
>>
>> In the case of the RAID card with BBU, *none* of those are forcible
>> dependancies.
>
> Certainly running write caching is not a good idea without a battery
> backed cache.  And write caching on the disk itself should never be
> enabled.  I don't trust UPSs that much.  To easy to overload and get a
> fun surprise when a power glitch does happen. :)
>
> Len Sorensen
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