> -----Original Message----- > From: linux-raid-owner@vger.kernel.org > [mailto:linux-raid-owner@vger.kernel.org]On Behalf Of Neil Brown > Sent: 17 November 2003 03:19 > To: James R Bamford > Cc: david.anderson@calixo.net; linux-raid@vger.kernel.org > Subject: RE: Software Raid 1 data corruptions.. > > > On Saturday November 15, jim@jimtreats.com wrote: > > > raiddev /dev/md0 > > raid-level 1 > > nr-raid-disks 2 > > nr-spare-disks 0 > > chunk-size 4 > > persistent-superblock 1 > > device /dev/hde1 > > raid-disk 0 > > device /dev/hdh1 > > raid-disk 1 > > Would I be right in guessing that hde1 is a master, but hdh1 is a > slave (though on different busses)? That's kind of an odd > configuration. > > You could try turning of DMA on the drives (hdparm ...) and see if you > still get corruption. If you don't, the finger point very much at the > IDE controller... Ok i managed to get corruptions (always only on the 2nd disk) according to md5sum on the same file, when they were mounted seperately and i performed the test on both drives simultaneously.. that at least made sense.. I will try the hdparm if it happens again but i just nuked the array, repartitioned to 15gig, rebuilt the array (sorry i followed the howto again as i tried dmadm to rebuild but it asked for a personality.. where do i specify this i couldn't see it in the conf file... anyways this just completed Performed the test and its fine.. the md5sum results are constant on the file... hopefully this has fixed it.. its unlikely this was a localised problem on the disk (as in using a higher point on the disk that currently isn't available) but i will rebuild the full array tomorrow and retest again.. it stood up with md5sum occuring on the raid array as well as on my / drive on the MB's standard ide controller... good signs indeed.. perhaps i wont need to buy that hardware raid card just yet :) I will look up on how to use mdadm to create the array but if you have any advice on this then that'd be good.. Finally i've been hearing these conversations on how to rebuild the array as well.. i guess this is the final test... i will simulate it with these mini partitions as it'll be quicker... i am right that the sync time will take as long when adding new devices as it did when adding it in the first place.. 3 hours or more for these 160gig drives.. Thanks.. hopefully i'm getting a break and this will all work from now on :) Cheers Jim > > NeilBrown > - > 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 - 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
