Date: Thu, 17 Oct 1996 19:27:09 -0700 From: "Michael L. VanLoon -- HeadCandy.com" <michaelv@MindBender.serv.net> To: "Marc G. Fournier" <scrappy@ki.net> Cc: Michael Hancock <michaelh@cet.co.jp>, Jaye Mathisen <mrcpu@cdsnet.net>, current@freebsd.org Subject: Re: Iozone: local vs nfs drives Message-ID: <199610180227.TAA14184@MindBender.serv.net> In-Reply-To: Your message of Thu, 17 Oct 96 17:00:06 -0400. <Pine.NEB.3.95.961017165857.27000A-100000@spirit.ki.net>
next in thread | previous in thread | raw e-mail | index | archive | help
>> Did you have tagged-command queuing enabled? According to my tests,
>> that will make a BIG difference, if you have decent drives.
> I don't know...I haven't enabled it manually, so I would assume
>not.
> How do I check/enable it? Any caveats I should worry about?
Put "options AHC_TAGENABLE" in your kernel config file, and rebuild
(this is on NetBSD, anyway, but it's the common code written by Justin
Gibbs).
Caveats? My NetBSD box has been running a ccd for about two months
striped across two drives, with this enabled (and the drives do
support tagged command queuing, yes). This is on NetBSD-current
(1.2), using the "common" AHC driver. No bad things have happened,
yet. :-)
-----------------------------------------------------------------------------
Michael L. VanLoon michaelv@MindBender.serv.net
--< Free your mind and your machine -- NetBSD free un*x >--
NetBSD working ports: 386+PC, Mac 68k, Amiga, Atari 68k, HP300, Sun3,
Sun4/4c/4m, DEC MIPS, DEC Alpha, PC532, VAX, MVME68k, arm32...
NetBSD ports in progress: PICA, others...
-----------------------------------------------------------------------------
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?199610180227.TAA14184>