Date: Thu, 6 Nov 1997 12:50:06 -0600 From: Bob Willcox <bob@pmr.com> To: Mike Smith <mike@smith.net.au> Cc: Christopher Masto <chris@netmonger.net>, freebsd-chat@FreeBSD.ORG Subject: Re: hardware Message-ID: <19971106125006.20805@pmr.com> In-Reply-To: <199711061656.DAA00276@word.smith.net.au>; from Mike Smith on Fri, Nov 07, 1997 at 03:26:37AM %2B1030 References: <63spq5$6j7$1@schenectady.netmonger.net> <199711061656.DAA00276@word.smith.net.au>
next in thread | previous in thread | raw e-mail | index | archive | help
On Fri, Nov 07, 1997 at 03:26:37AM +1030, Mike Smith wrote: snip > > You don't RC. IDE moved the register set of the WD1003 onto the disk; > arguably a Bad Idea but see my response to Joerg for commentary on > progress lately. The "smarts" in an IDE and SCSI disk are prettymuch > comparable. However, does the current specification/hardware for IDE allow the overlapping of commands (seeks on one drive with data xfer on another)? (Not to mention multiple commands pending per drive, i.e., command tag queuing.) None of the IDE controllers I have used do (admittedly, I haven't bothered with IDE in years). This is a big win on my systems that all have multiple disk drives on them (my primary workstation has 2 SCSI controllers and 8 disk drives). snip > > People making impassioned arguments based on their experience "years > ago" are strongly urged to reevaluate this technology at their leisure. > No promises are made as to absolute results, merely that consideration > for these disks should *not* be summarily dismissed as is the vogue. See my comment above. Till IDE supports overlapped operations to multiple devices on the same controller, it will lose in MY environment! (And I dare say, most environments where there is two or more disks and you are running an OS that takes advantage of SCSI's ability to overlap commands.) -- Bob Willcox Deliberation, n.: The act of examining one's bread bob@luke.pmr.com to determine which side it is buttered on. Austin, TX -- Ambrose Bierce, "The Devil's Dictionary"
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?19971106125006.20805>