[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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