From: Tim Moore <linux-raid@nsr500.net>
To: linux-raid@vger.kernel.org
Subject: Re: Raid5 Construction Question
Date: Thu, 19 Aug 2004 11:32:32 -0700 [thread overview]
Message-ID: <4124F240.20606@nsr500.net> (raw)
In-Reply-To: <4124E24E.7070802@psc.edu>
My raid tab has 'chunk-size 64' and I get 64k chunks. Does 'chunk-size
64k' mean 64M chunks?
Did you set stride correctly when running mke2fs (based on
chunk_size/fs_block_size)?
Either one of these could trash performance.
rgds,
tim
PAulN wrote:
> Hi,
> So I have a raid 5 which is around ~1TB and the problem I've been having
> is that
> the resync rate is really bad. This is understandable given that the
> raid5 has not
> been initialized. Does anyone know a way for me to initialize my raid5
> before I use it so
> that the resync process doesn't run for 3 days?
> thanks
> paul
>
>
> Config:
> -------------------------------------------------
> raiddev /dev/md0
> raid-level 5
> nr-raid-disks 7
> nr-spare-disks 1
> chunk-size 64k
> persistent-superblock 1
> parity-algorithm left-symmetric
> device /dev/sda1
> raid-disk 0
> device /dev/sdb1
> raid-disk 1
> device /dev/sdc1
> raid-disk 2
> device /dev/sdd1
> raid-disk 3
> device /dev/sde1
> raid-disk 4
> device /dev/sdg1
> raid-disk 5
> device /dev/sdf1
> raid-disk 6
> device /dev/sdh1
> spare-disk 0
> ----------------------------------------
>
> -
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next prev parent reply other threads:[~2004-08-19 18:32 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-08-19 17:24 Raid5 Construction Question PAulN
2004-08-19 17:30 ` Guy
2004-08-19 17:52 ` PAulN
2004-08-19 18:17 ` Guy
2004-08-19 18:24 ` PAulN
2004-08-19 18:29 ` Guy
2004-08-19 18:35 ` Gordon Henderson
2004-08-19 20:24 ` Maarten van den Berg
2004-08-19 20:26 ` Kourosh
2004-08-19 20:39 ` Mike Hardy
2004-08-19 21:50 ` Maarten van den Berg
2004-08-19 21:55 ` Guy
2004-08-19 20:53 ` Guy
2004-08-20 1:21 ` Neil Brown
2004-08-20 1:56 ` Guy
2004-08-20 2:01 ` Neil Brown
2004-08-20 4:53 ` Paul Nowoczynski
2004-08-19 18:32 ` Tim Moore [this message]
2004-08-19 20:30 ` Maarten van den Berg
2004-08-23 15:24 ` Tim Moore
2004-08-23 15:27 ` Gordon Henderson
-- strict thread matches above, loose matches on Subject: below --
2004-08-20 5:17 Mike Baynton
2004-08-20 6:52 ` Guy
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