From mboxrd@z Thu Jan 1 00:00:00 1970 From: Bryce Subject: Re: Question on Raid 5 array initial creation times Date: Fri, 13 Mar 2009 15:13:37 +0000 Message-ID: <49BA7821.7070208@zeniv.linux.org.uk> References: <3513de790903032058o231d9083n20092b78ed241d3b@mail.gmail.com> <8e124f160903032356k6346c370n1974fb95c53e5f7f@mail.gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <8e124f160903032356k6346c370n1974fb95c53e5f7f@mail.gmail.com> Sender: linux-raid-owner@vger.kernel.org To: linux-raid@vger.kernel.org List-Id: linux-raid.ids Big Wave Dave wrote: > On Tue, Mar 3, 2009 at 8:58 PM, Dylan Distasio 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 > -- > To unsubscribe from this list: send the line "unsubscribe linux-raid" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > 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 =--=