I've tried the following configurations, none of which ended up in DMA functioning on the D610. # CONFIG_BLK_DEV_PIIX is not set CONFIG_ATA_PIIX=y CONFIG_PATA_MPIIX=y CONFIG_PATA_OLDPIIX=y # CONFIG_BLK_DEV_PIIX is not set CONFIG_ATA_PIIX=y CONFIG_PATA_MPIIX=y # CONFIG_PATA_OLDPIIX is not set Ultimately, my goal is to run shred at as quick a pace as possible on all machines. The D610 runs slow with the kernel config I was using for the D600 (any various other machines). I had success on making it run quickly on the D610 by configured the kernel with ATA/ATAPI/MFM/RLL support turned off completely. Any thoughts as to why the configs listed above don't seem to work for DMA on my D610? On 1/11/08, Alan Cox <alan@xxxxxxxxxxxxxxxxxxx> wrote: > > My concern with disabling the new drivers is as follows: I use this > > linux kernel and config image to boot machines over PXE and call a > > shred program on each of the harddrives. If I turn off CONFIG_ATA, > > will this limit my ability to support various new IDE and SATA drives > > for running shred? So far, the configuration I have works well with > > Yes. In that case you can build without CONFIG_IDE_PIIX and with the > CONFIG_ATA_PIIX driver and you should be fine too (but your disk will > move to /dev/sda on that box). The PIIX is an awkward case as in some > modes it combines both the SATA and PATA onto one 'device'. > > > most of the machines I encounter (and with both SATA and IDE drives), > > except for the Dell D610 and HP 7700 (small desktop pc). The models I > > just mentioned run the shred really slow, which I believe is due to > > the DMA problem I was having (outlined in my previous emails). Any > > thoughts? > > If your shred program is relying on DMA then you are using the wrong tool > for the job. The correct way to erase a disk is to send it a security > erase command. Rewriting over the data may not do what is wanted. > -- Kristin Vadas Marsicano kristin.marsicano@xxxxxxxxx kristinisme.blogspot.com - To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
