From: Volker Armin Hemmann <volkerarmin@googlemail.com>
To: gentoo-user@lists.gentoo.org
Subject: Re: [gentoo-user] 1-Terabyte drives - 4K sector sizes? -> bar performance so far
Date: Wed, 10 Feb 2010 09:43:04 +0100 [thread overview]
Message-ID: <201002100943.04711.volkerarmin@googlemail.com> (raw)
In-Reply-To: <1265785907.3225.10.camel@localhost>
On Mittwoch 10 Februar 2010, Iain Buchanan wrote:
> On Wed, 2010-02-10 at 07:31 +0100, Volker Armin Hemmann wrote:
> > On Mittwoch 10 Februar 2010, Iain Buchanan wrote:
> > > so long as you didn't have any non-detectable disk errors before
> > > removing the disk, or any drive failure while one of the drives were
> > > removed. And the deterioration in performance while each disk was
> > > removed in turn might take more time than its worth. Of course RAID 1
> > > wouldn't suffer from this (with >2 disks)...
> >
> > Raid 6. Two disks can go down.
>
> not that I know enough about RAID to comment on this page, but you might
> find it interesting:
> http://www.baarf.com/
> specifically:
> http://www.miracleas.com/BAARF/RAID5_versus_RAID10.txt
to give you an example, why raid 1 is not a good choice (and raid 10 too).
You have two disks configured as mirror. They report different blocks. Which one
is the correct one?
And suddenly your system has to guess and you are very out of luck.
Another reason, the author of that text stresses that you have to do more
writes. Newsflash: with Raid1 every single block has to be written twice. So if
you use additional writes against Raid5, Raid1 is instantly disqualified.
You shouldn't listen to people with an agenda.
This is almost as bad as the site that claimed that SATA is much worse than
PATA in every single aspect ...
next prev parent reply other threads:[~2010-02-10 8:43 UTC|newest]
Thread overview: 78+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-02-07 16:27 [gentoo-user] 1-Terabyte drives - 4K sector sizes? -> bar performance so far Mark Knecht
2010-02-07 17:30 ` Alexander
2010-02-07 18:19 ` Volker Armin Hemmann
2010-02-07 19:26 ` Mark Knecht
2010-02-07 18:38 ` Mark Knecht
2010-02-07 19:16 ` Volker Armin Hemmann
2010-02-07 19:39 ` Willie Wong
2010-02-07 20:31 ` Mark Knecht
2010-02-07 21:59 ` Kyle Bader
2010-02-07 21:42 ` Mark Knecht
2010-02-08 2:08 ` Willie Wong
2010-02-08 17:10 ` Mark Knecht
2010-02-08 18:52 ` Valmor de Almeida
2010-02-08 20:34 ` Paul Hartman
2010-02-09 0:27 ` Neil Bothwick
2010-02-09 12:46 ` Stroller
2010-02-09 13:34 ` Neil Bothwick
2010-02-09 23:37 ` Iain Buchanan
2010-02-10 6:31 ` Volker Armin Hemmann
2010-02-10 7:11 ` Iain Buchanan
2010-02-10 8:37 ` Volker Armin Hemmann
2010-02-10 8:43 ` Volker Armin Hemmann [this message]
2010-02-09 13:35 ` Volker Armin Hemmann
2010-02-09 13:57 ` J. Roeleveld
2010-02-09 15:11 ` Stroller
2010-02-09 15:27 ` J. Roeleveld
2010-02-09 17:38 ` Stroller
2010-02-09 18:25 ` Mark Knecht
2010-02-09 19:29 ` J. Roeleveld
2010-02-09 15:43 ` Neil Bothwick
2010-02-09 17:17 ` Stroller
2010-02-09 20:30 ` Neil Bothwick
2010-02-09 18:03 ` Neil Walker
2010-02-09 19:37 ` J. Roeleveld
2010-02-09 23:52 ` Iain Buchanan
2010-02-10 1:16 ` Stroller
2010-02-10 6:59 ` Neil Walker
2010-02-10 7:31 ` Iain Buchanan
2010-02-10 1:28 ` Stroller
2010-02-10 11:14 ` J. Roeleveld
2010-02-10 16:37 ` Stroller
2010-02-10 17:26 ` J. Roeleveld
2010-02-10 20:48 ` Stroller
2010-02-10 0:11 ` Peter Humphrey
2010-02-10 6:48 ` Neil Walker
2010-02-09 17:33 ` Paul Hartman
2010-02-09 7:47 ` J. Roeleveld
2010-02-09 23:22 ` Iain Buchanan
2010-02-10 7:08 ` Alan McKinnon
2010-02-10 10:56 ` J. Roeleveld
2010-02-10 10:53 ` J. Roeleveld
2010-02-10 11:03 ` Volker Armin Hemmann
2010-02-10 11:17 ` J. Roeleveld
2010-02-10 11:24 ` Volker Armin Hemmann
2010-02-08 5:25 ` Valmor de Almeida
2010-02-08 19:57 ` Stroller
2010-02-09 0:05 ` Frank Steinmetzger
2010-02-09 0:37 ` Mark Knecht
2010-02-09 2:48 ` Frank Steinmetzger
2010-02-09 17:09 ` Frank Steinmetzger
2010-02-09 18:21 ` Mark Knecht
2010-02-09 21:13 ` Frank Steinmetzger
2010-02-09 22:17 ` J. Roeleveld
2010-02-09 22:54 ` Mark Knecht
2010-02-10 0:31 ` Iain Buchanan
2010-02-10 1:27 ` Mark Knecht
2010-02-10 7:06 ` Iain Buchanan
2010-02-09 16:31 ` Mark Knecht
2010-02-12 9:06 ` Mick
2010-02-12 12:14 ` Mark Knecht
2010-02-09 0:47 ` Stroller
2010-02-09 2:20 ` Willie Wong
2010-02-15 0:48 ` Frank Steinmetzger
2010-02-15 1:17 ` Willie Wong
2010-02-15 3:17 ` Mark Knecht
2010-02-15 18:03 ` Frank Steinmetzger
2010-02-15 23:53 ` Alex Schuster
2010-02-16 17:35 ` Frank Steinmetzger
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