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SubjectRe: limits on raid
On Tue, 19 Jun 2007, Phillip Susi wrote:

> david@lang.hm wrote:
>> one channel, 2 OS drives plus the 45 drives in the array.
>
> Huh? You can only have 16 devices on a scsi bus, counting the host adapter.
> And I don't think you can even manage that much reliably with the newer
> higher speed versions, at least not without some very special cables.

6 devices on the bus (2 OS drives, 3 promise drive shelves, controller
card)

>> yes I realize that there will be bottlenecks with this, the large capacity
>> is to handle longer history (it's going to be a 30TB circular buffer being
>> fed by a pair of OC-12 links)
>
> Building one of those nice packet sniffers for the NSA to install on AT&Ts
> network eh? ;)

just for going back in time to track hacker actions at a bank.

I'm hopeing that once I figure out the drives the rest of the software
will basicly boil down to tcpdump with the right options to write to a
circular buffer of files.

David Lang
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