RE: [cgl_specs] Questions about the usage model of Block device removal

Hi, Mark

>>The first question is: Does this requirement include "surprise
removal"?
>>That is, when the block device is surprise-removed, we should
guarantee
>>the reliability of system.
>

>It would be cool trick to make have such a thing work.  I'd consider
making that >a requirement until the details on why it may not be
possible come out.

Could you give us more explanation about what "surprise-removal" is used
for? 
What's the motivation of a "surprise-removal"?
Will a new or old disk be used for the replacement?

Thanks,
Forrest

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