Date: Fri, 07 Nov 1997 12:11:45 +1030 From: Mike Smith <mike@smith.net.au> To: Bob Willcox <bob@luke.pmr.com> Cc: Mike Smith <mike@smith.net.au>, Christopher Masto <chris@netmonger.net>, freebsd-chat@FreeBSD.ORG Subject: Re: hardware Message-ID: <199711070141.MAA00357@word.smith.net.au> In-Reply-To: Your message of "Thu, 06 Nov 1997 12:50:06 MDT." <19971106125006.20805@pmr.com>
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: > > 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)? Yes. > (Not to mention multiple commands pending per drive, i.e., command tag > queuing.) Yes. > None of the IDE controllers I have used do (admittedly, I > haven't bothered with IDE in years). And from this vantage point you seek to criticise? > > 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! ... so I suggest that you start agitating for software support for more advanced IDE disk features. Mr John Hood (cgull@smoke.marlboro.vt.us IIRC) is our current high-end IDE god. Perhaps throwing the odd encouragement and (equipment) donation his way might see you able to save some serious money in the longer term. mike
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?199711070141.MAA00357>