[luau] INFO: Heavy duty storage needs

R. Scott Belford sctinc at flex.com
Thu May 2 15:13:34 PDT 2002


If you intend to record most or all of the traffic moving over your 
network, you need to spend as much time thinking about your disk 
subsystem as your processor and Ethernet card. Last year Sandstorm spent 
several months comparing IDE drives with the UDMA100 interface to SCSI 
LVD-160 drives. We also explored a variety of RAID systems. The 
conclusion: today's IDE drives are significantly faster than SCSI drives 
costing two or three times more per gigabyte stored.

This is not the result we were expecting, and it goes directly against 
the conventional wisdom that says SCSI is inherently better than IDE. 
Nevertheless, it does seem to be the ugly truth, at least for 
straightforward read/write tests in a single-user environment. Although 
we saw the highest performance with a hardware-based RAID 5 system 
manufactured by Advanced Computer & Network Corporation, we saw nearly 
the same performance with a RAID 5 system based on the 3Ware Escalade 
7000 RAID controller.

from an article about network data capture at

http://www.oreillynet.com/lpt/a//network/2002/04/26/nettap.html
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