From: Bryce <bryce@zeniv.linux.org.uk>
To: linux-raid@vger.kernel.org
Subject: Re: Question on Raid 5 array initial creation times
Date: Fri, 13 Mar 2009 15:13:37 +0000 [thread overview]
Message-ID: <49BA7821.7070208@zeniv.linux.org.uk> (raw)
In-Reply-To: <8e124f160903032356k6346c370n1974fb95c53e5f7f@mail.gmail.com>
Big Wave Dave wrote:
> On Tue, Mar 3, 2009 at 8:58 PM, Dylan Distasio <interzone@gmail.com> wrote:
>
>> I wanted to check to see if anyone could provide a rough estimate of
>> how long a RAID 5 initial build should take under mdadm.
>>
>> I am creating a RAID 5 array with 5x1TB Western Digital Black 7200RPM
>> SATA drives on the following system:
>>
>> Ubuntu 8.10 / ext3 filesystem on array and OS drive
>> 1 gig of PC3200 RAM
>> AMD Athlon 64 3200+
>> Nforce4 motherboard
>>
>> I am getting a minimum speed of approximately 14000K/sec with an
>> estimated finish time of roughly 19 hrs from now.
>>
>> Is this a reasonable speed for creating a RAID 5 array with mdadm?
>>
>> Thanks.
>>
>
> I actually did a similar setup recently, and it was very similar
> timing. I'm not sure if it should have been faster/slower, but I can
> confirm I saw the same thing.
>
> Dave
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>
I guess it depends on how your HW is configured
I've a 5x1Tb raid5 setup and that took ~ 2hr 40 min (@~72Mb/s)
I dunno what your disk IO topology is but it sort of sounds like you're
maxing out the bus IO bandwidth assuming you're sharing the disk IO with
other cards.. I dunno, video/tv card/sound whatever.
Phil
=--=
prev parent reply other threads:[~2009-03-13 15:13 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-03-04 4:58 Question on Raid 5 array initial creation times Dylan Distasio
2009-03-04 7:56 ` Big Wave Dave
2009-03-13 15:13 ` Bryce [this message]
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