Re: limits on raid

On Tue, 19 Jun 2007, Phillip Susi wrote:

david@lang.hm wrote:

quoted

 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)

quoted

 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