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curFlag for Sri Lanka

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RAID controller on board and Card

we have come to know that some limitation on the RAID  controller pick from the onboard and card based

we have done the test on our few servers to check the RAID is working on the define Standard . we have realized that two servers didn't work after removing one  hard disk from the RAID 1 setup  server . When I check with the vendor and replay to me that server has the entry level RAID control card and without fixing the second hard disk will not going to work . So it means it will take some to rebuild the second hard disk . till that time server not in the online mode

if I want to go with the realizable RAID .we need to have the enterprise raid controller with hot shapeable HDDs  

please comment on the above with your expertise knowledge
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John Tsioumpris
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I am totally agree with you . is it possible to work in the enterprise level without fail hard disk  without inserting into hard disk bay . I thought system will not work without the entire hard disk array . what is the best way to check the RAID is working on the well mentioned  server  .
some times our insurance parties asking us the show us the RAID setup in place . we have already showed them the hard disk RAID setup  . but their not satisfied with the given answer in terms of testing  RAID  ? I don't know the industry best practice on the testing of the live server RAID for insurance purpose
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In my case  entry level PCI card and didn't work after removing. I think my card entry level ?
what are the recommended hard disk type for critical application point to consider
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