From owner-freebsd-hardware Wed Jan 12 14:42:16 2000 Delivered-To: freebsd-hardware@freebsd.org Received: from tdnet.com.br (guepardo.tdnet.com.br [200.236.148.6]) by hub.freebsd.org (Postfix) with ESMTP id 22E961500B for ; Wed, 12 Jan 2000 14:42:08 -0800 (PST) (envelope-from grios@ddsecurity.com.br) Received: from ddsecurity.com.br [200.236.148.143] by tdnet.com.br with ESMTP (SMTPD32-5.05) id A5C026B022E; Wed, 12 Jan 2000 19:52:48 -0300 Message-ID: <387D0354.63159B8@ddsecurity.com.br> Date: Wed, 12 Jan 2000 20:42:28 -0200 From: Gustavo V G C Rios X-Mailer: Mozilla 4.51 [en] (X11; I; FreeBSD 3.4-STABLE i386) X-Accept-Language: en MIME-Version: 1.0 To: Olaf Hoyer Cc: freebsd-hardware@FreeBSD.ORG Subject: Re: hardware References: <4.1.20000112194049.009b7ba0@mail.rz.fh-wilhelmshaven.de> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-freebsd-hardware@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org Olaf Hoyer wrote: > >If adaptec 3950U2W is not supported by FreeBSD 3.4Stable, i am > >considering using 2940U2W. > >I would like to hear from you, what options on hard disk i have (Ones > >that delivers 80MB/s) and how success you have gotten using them. > > No actual HDD thats available does 80 MB/sec. the fastest ones (like the > Barracuda series or Atlas or DRVS) do about 20 MB/sec under best > circumstances, regarding the mechanical parts of them. electronic transfer > (drive chache on electronic to PCI/main memory) of course is much faster. > The only drives that could be able to delever that as a single drive are > the solid state HDDs, mainly consisting of RAM chips... > This money nowadays is mostly better spent in better mainboard with larger > amount of RAM. > The 80 MB/sec make sense regarding a RAID config or simply some (3-4) > drives being used at the same time, like in a file server without RAID, or > in a workstation which does some multimedia stuff, because the drives share > the total bandwidth of the controller. Oops! So i cannot understand, take a closer look: http://www.seagate.com/cda/products/discsales/marketing/detail/0,1121,43,00.shtml May anyone here explain me this ? Thanks for your time and cooperation (and for patience too). To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hardware" in the body of the message