From: Carlos Mennens <carloswill@gmail.com>
To: Mdadm <linux-raid@vger.kernel.org>
Subject: Re: RAID1 On 3 Drives
Date: Mon, 15 Mar 2010 07:30:18 -0500 [thread overview]
Message-ID: <d80f793f1003150530y1b229f43s1f140f91ab74f3e8@mail.gmail.com> (raw)
In-Reply-To: <4B9C24B6.7040507@tmr.com>
On Sat, Mar 13, 2010 at 6:50 PM, Bill Davidsen <davidsen@tmr.com> wrote:
> Having a spare on raid-1 is fairly pointless, it hurts performance and buys
> you nothing. Having one more copy of the data built and ready serves you
> better.
Can you explain this as I find this interesting. How does having a
/boot partition on 3 drives with 1 spare hurt performance? Are you
saying that I would get better drive performance if I had all 4 disk
partitions active members of my RAID1 /boot? I just don't understand
how the 4th disk doing nothing but acting as a spare would hinder
performance.
Secondly, if the above statement also applies to my / partition? Would
you suggest using all 4 drives as active partitions in a RAID5 array
too? If I have a 3 disk RAID5 and one hot spare, do you think I would
get less performance value for my configuration?
Thanks for the clarification!
next prev parent reply other threads:[~2010-03-15 12:30 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-03-13 22:30 RAID1 On 3 Drives Joachim Otahal
2010-03-13 23:18 ` Carlos Mennens
2010-03-13 23:50 ` Bill Davidsen
2010-03-15 12:30 ` Carlos Mennens [this message]
2010-03-15 12:48 ` Majed B.
2010-03-15 14:47 ` Carlos Mennens
2010-03-15 16:05 ` Majed B.
2010-03-16 1:46 ` Keld Simonsen
2010-03-20 16:08 ` Bill Davidsen
-- strict thread matches above, loose matches on Subject: below --
2010-03-13 21:06 Carlos Mennens
2010-03-13 21:21 ` Majed B.
2010-03-13 21:24 ` Carlos Mennens
2010-03-14 21:09 ` Luca Berra
2010-03-13 21:45 ` Neil Brown
2010-03-13 21:26 ` Neil Brown
2010-03-13 21:31 ` Majed B.
2010-03-13 21:50 ` Neil Brown
2010-03-14 3:30 ` Majed B.
2010-03-14 1:22 ` thib
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