Skip site navigation (1)Skip section navigation (2)
Date:      Sun, 24 Mar 2002 19:39:03 +0200 (SAST)
From:      Willie Viljoen <will@laserfence.net>
To:        Robert Watson <rwatson@freebsd.org>
Cc:        "Karsten W. Rohrbach" <karsten@rohrbach.de>, <freebsd-fs@freebsd.org>, <freebsd-bugs@freebsd.org>
Subject:   Re: Soft update instability with heavy IO and offboard IDE controller
Message-ID:  <20020324193812.Q307-100000@phoenix.vh.laserfence.net>
In-Reply-To: <Pine.NEB.3.96L.1020324123436.47668h-100000@fledge.watson.org>

next in thread | previous in thread | raw e-mail | index | archive | help
Robert, I wouldn't be in the least surprised, but let's all hope they
don't go that way, for people who don't want to dish out the cash to buy
the most stable (and expensive) hardware, it would be the end of
reliability.

On Sun, 24 Mar 2002, Robert Watson wrote:

>
> On Sun, 24 Mar 2002, Karsten W. Rohrbach wrote:
>
> > Robert Watson(rwatson@freebsd.org)@2002.03.24 09:22:47 +0000:
> >
> > > I have to say that my answer on the ATA write caching is a UPS. :-)
> >
> > i hope, this is not meant seriously. an ups keeps your system running in
> > case of mains power outage, true. it does not help anything in the
> > following (common) scenarios:
> > - the power supply blows
> > - bad power cable
> > - neutron bombs ;-)
> >
> > honestly, judging from the quality of hardware you get in .de the first
> > two things happen more often than a real power outage, so i'd say an ups
> > is no viable solution when enabling ata wc. it may give you a warm fuzzy
> > feeling, but that's about it :-)
> >
> > just my EUR 0.02, in case something makes it a FAQ to go into the
> > handbook...
>
> In my area, power grid failure is a real problem, far more likely than
> power supply failure, unfortunately.  Obviously, in the end, it's a
> tradeoff regarding performance and reliability.  If you want real
> reliability, you have to buy hardware that actually behaves the way the
> software expects.  I don't think anyone would be surprised if a future
> generation of IDE disks ignored the 'write cache disable' setting to gain
> performance.
>
> Robert N M Watson             FreeBSD Core Team, TrustedBSD Project
> robert@fledge.watson.org      NAI Labs, Safeport Network Services
>
>
>
> To Unsubscribe: send mail to majordomo@FreeBSD.org
> with "unsubscribe freebsd-fs" in the body of the message
>
>
>

-- 
Willie Viljoen
Private IT Consultant

214 Paul Kruger Avenue
Universitas
Bloemfontein
9321

South Africa

+27 51 522 15 60, a/h +27 51 522 44 36
+27 82 404 03 27

will@laserfence.net


To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-fs" in the body of the message




Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20020324193812.Q307-100000>