Date: Fri, 24 Apr 1998 13:02:29 -0700 From: Mike Smith <mike@smith.net.au> To: dwilde1@ibm.net Cc: freebsd-advocacy@FreeBSD.ORG, freebsd-hardware@FreeBSD.ORG Subject: Re: *** Real Action Item: SPECweb Message-ID: <199804242002.NAA01282@dingo.cdrom.com> In-Reply-To: Your message of "Fri, 24 Apr 1998 11:57:51 PDT." <3540E0AF.C3B5C576@ibm.net>
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> Tom wrote: > > > Better off using the hardware RAID0 in a DPT PM334UW. It also has 64MB > > of write-back cache so, it can re-order i/o to be more efficient. > > > > Also, using only tiny bit of each hard drive improves drive level > > caching. Most drives have only a 1MB cache. > > I have a friend at Winchester Systems who's trying to sell me a SCSI-3 > RAID box, and I think they'd be willing to let us borrow one for a test > in return for favorable mention http://www.winsys.com. He says they work > with fast differential 2944's as host cards. Is the DPT faster with the > direct bus connection? No SCSI at all? It sounds like there's some requirement to use disks; if throughput is an issue then the DPT is probably the way to go. > Does anybody have experience with these new Compact PCI chassis that > have 8 PCI slots? An obvious bottleneck for anything we can do is going > to be the chassis limitation on most of 4 PCI. These are generally 4 slots and a bridge with 4 more behind. Depending on the configuration and the hardware in question, more slots is not necessarily better. -- \\ Sometimes you're ahead, \\ Mike Smith \\ sometimes you're behind. \\ mike@smith.net.au \\ The race is long, and in the \\ msmith@freebsd.org \\ end it's only with yourself. \\ msmith@cdrom.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hardware" in the body of the message
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