> -----Original Message----- > From: Mark Hahn [mailto:hahn@physics.mcmaster.ca] > Sent: 15 November 2003 17:00 > To: James R Bamford > Subject: Re: Software Raid 1 data corruptions.. > > > > Promise Ultra 100 IDE controller > > 2 x Samsung 8meg 160gig hdd > > > > I thought the promise controller was a raid controller, not > used it for a > > while.. but its just plain ide.. tho on reading i discovered that most > > but that's fine, since you've only got two disks (no raid5), > and are not going to saturate your PCI bus. Good to know and yes thats what i expected.. > > > are basically just a controller with drivers to perform the raid > > functionality in software.. > > hw raid is mostly a fraud. for sub-r5, it usually doesn't make sense > because there is essentially zero extra work in doing r0 or r1. > all disk interfaces have been fully busmastering for well over 5 years, > even on cheap hardware. you *could* argue that your data has to > travel over the PCI twice for r1 writes. it's true, but probably not > a bottleneck, since you'll be unlikley to sustain writes of more than > 40 MB/s per disk. Ok > > > I just got it mounted and copied a file into it.. a 450meg > image file... I > > started running some md5 tests on the file (paranoid from other machines > > recently having hdd corruptions) sadly i started to get this > kind of result > > > > [jim@backup test]$ md5sum image.nrg > > 3b5da2f7ad0e174421306b62a636fa12 image.nrg > > > > [jim@backup test]$ md5sum image.nrg > > 4e815cd2c3ab565315ef47f53665f6ba image.nrg > > > > [jim@backup test]$ md5sum image.nrg > > a14990ebfd5c502a68c29e2f789a34dd image.nrg > > this isn't a via motherboard, is it? have you run memtest86 overnight? > This is via promise Ultra 100 controller.. pci card.. I've not run memtest yet but will do that now.. seeing as i can perform this test without raid i'd of thought the md5sum calculations were more siginificant in memory usage than raid but then again i dont know a lot about raid.. I will start testing with memtest86 now > > patches i can try.. should i abandon linux for raid and try > using windows... > > egads. there are billions and billions of ide-based linux servers > out there, and most of them work fine. your task is to find out what's > wrong with your hardware. > Ok thanks I will look into this... all my computers seem to break at the moment - 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
