From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jay Roberts Subject: Re: New RAID array syncs very slow Date: Wed, 24 Mar 2004 07:20:06 -0500 Sender: linux-raid-owner@vger.kernel.org Message-ID: <40617CF6.1000308@oddpost.com> References: <40602BE7.8080705@oddpost.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: To: linux-raid@vger.kernel.org List-Id: linux-raid.ids This turned out to be really helpful. While investigating why one of the drives had so much lower numbers than the others using the test you suggested, I discovered a bent down pin in the cable socket. After fixing , the stats popped back up to the other drives' levels, and the estimated sync time on the 1.3 Duron box dropped to around 4 hours. I moved all the hardware back to the original P3-450 box, made sure DMA was enabled, and the sync time was now only 8 hours vs 91. A huge improvement and a livable time period. I was surprised at the difference in sync time between the two boxes. Almost double on the P3-450 over the 1.3 Duron. Gordon Henderson wrote: >On Tue, 23 Mar 2004, Jay Roberts wrote: > > > >>I just set up a new Raid5 array using 4 200GB disks on 2 controllers. I >>created the array, and it begins to sync up, but it will not sync at >>over 600Kb. It has been over 12 hours now, and the sync is only 7% done. >>>>From reading, I know that sync should only take a few hours, but at the >>current rate mine will take 91 hours which seems like an insane amount >>of time. I am looking for any advice on this. Details follow: >> >> > >You probably don't have DMA enabled on the controller. See what > > hdparm /dev/hde > >and for all the other drives you have gives. > >Do a crude speed test with > > hdparm -Tt /dev/hde > >too. You ought to get at least 45MB/sec on a modern IDE drive. > >You might have to build a custom kernel to get the right driver for the >chipset. > >Gordon >- >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 > >