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>
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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-bugs" in the body of the message
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