Date: Fri, 23 Apr 2004 21:16:53 +0200 From: Jens Schweikhardt <schweikh@schweikhardt.net> To: Dan Strick <strick@covad.net> Cc: freebsd-scsi@freebsd.org Subject: Re: Hardware Striping Message-ID: <20040423191653.GA28887@schweikhardt.net> In-Reply-To: <200404231845.i3NIjWMJ000414@mist.nodomain> References: <200404231845.i3NIjWMJ000414@mist.nodomain>
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On Fri, Apr 23, 2004 at 11:45:32AM -0700, Dan Strick wrote: # >> # > ... # > I have two pairs of identical U160 SCSI disks # > ... # > Until now I'm using an Adaptec 29160 Host Adapter, but of course it is # > not HW-RAID0 capable. What card am I looking for? # > # > The disks have a sustained read rate of 60 to 70 Mbyte/s, so if all of # > them were used at the same time they could saturate an U160 bus. Is this # > a problem? # > ... # >> # # We can assume that a high speed SCSI host adapter will have a faster # PCI interface but the vast majority of even modern motherboards have # only a traditional 33 MHz 32 bit PCI which would saturate well below # 133 Mbyte/sec. # # What variety of PCI bus does your system have? Good point! The board is an ASUS A7N8X, the manual says it has a PCI 2.2 conformant bus, with a 133MB max throughput. So any U320 RAID is certainly overkill. Regards, Jens -- Jens Schweikhardt http://www.schweikhardt.net/ SIGSIG -- signature too long (core dumped)
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