On Saturday 13 November 2004 09:02, Jim Cornette wrote: >Erik Hemdal wrote: >>>>>md5sum -c MD5SUM >>>>> >>>>>I've already indicated this once. After successful MD5SUM check >>>>> - boot with 'linux ide=nodma' and then do the MediaCheck.) >> >> I think this comment was from Satish about ide=nodma. Why is that >> necessary? I've encountered the mediacheck failures similarly for >> the first time ever. If the drive operates normally, why do we >> need nodma in order to check only disk2 and disk3 of the CD set? >> >> I'm not intending this as disrespectful to anyone; I'm truly >> curious about it. Out of the four install images, all four pass >> the MD5 checksum test, and two out of four pass the mediacheck. >> On my CD writer, cdrecord reports that the buffer was always >> adequately filled and burnfree protection was never needed. So >> assuming the integrity of the media is OK (seems to be, since >> cdrecord reports no errors and the CD is readable), I'd suspect a >> problem with the original ISO image. Whether you use DMA or not on >> your drive doesn't seem to have any bearing on things....else >> other I/O would have trouble too. >> >> Am I missing something? >> >> Erik > >Check the fedora-test-list for discussions regarding the mediacheck >failure. Padding the discs with at least 150 kb was suggested, > loading the ide-scsi or using the 2.4 kernel was suggested. I guess > there is some breakage which happened with the change to the 2.6 > kernel. > >I'm glad that adding ide=nodma to the installer before a mediacheck >works to verify the discs successfully. This also probably helps > ensure more reliable installs with systems that show the mediacheck > false result during verifying. > >I feared a mass explosion of coasters because of this problem and no >reference to the problem within the release notes. For those reading >this list, the coaster collection is probably lower. >For installers not on the list and attempting an install, the > mirrors, reburning discs multiple times and giving up on the > release might be at higher levels. > >Jim After having a hell of a time getting them, I burnt all 9 disks yesterday usng k3b from a konstuct built kde3.3 install, makeing k3b verify the burns, using kernel 2.6.10-rc1-bk20. dma is enabled and the minimum buffer fill during any of the burns at about 32x was 98%. Perhaps something has sneaked into the distribution kernel that doesn't need to be there? -- Cheers, Gene "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) 99.28% setiathome rank, not too shabby for a WV hillbilly Yahoo.com attorneys please note, additions to this message by Gene Heskett are: Copyright 2004 by Maurice Eugene Heskett, all rights reserved.
