https://www.thinkwiki.org/w/api.php?action=feedcontributions&feedformat=atom&user=Swerner 2026-05-04T03:54:06Z User contributions MediaWiki 1.31.12 https://www.thinkwiki.org/w/index.php?title=Talk:How_to_improve_harddisk_performance&diff=33856 2007-10-13T06:08:11Z

<p>Swerner: Made comment on DMA - it's Ok</p> <hr /> <div>On Ubuntu 7.04, you have to use /dev/sda rather than /dev/hda, but when you do this it generates some warnings:<br /> <br /> &lt;pre&gt;<br /> root@T40-thinkpad:/home/user# hdparm -d1c1u1m16 /dev/sda<br /> <br /> /dev/sda:<br /> setting 32-bit IO_support flag to 1<br /> HDIO_SET_32BIT failed: Invalid argument<br /> setting multcount to 16<br /> HDIO_SET_MULTCOUNT failed: Inappropriate ioctl for device<br /> setting unmaskirq to 1 (on)<br /> HDIO_SET_UNMASKINTR failed: Inappropriate ioctl for device<br /> setting using_dma to 1 (on)<br /> HDIO_SET_DMA failed: Inappropriate ioctl for device<br /> HDIO_GET_MULTCOUNT failed: Inappropriate ioctl for device<br /> IO_support = 0 (default 16-bit)<br /> root@T40-thinkpad:/home/user# <br /> &lt;/pre&gt;<br /> <br /> Maybe hdparm is obsolete now? -- All the best, [[User:Nickj|Nickj]] 08:16, 1 September 2007 (UTC)<br /> <br /> <br /> I have the same experience on my R40, although I cannot set DMA mode with hdparm, the DVD still seems to work at a reasonable pace. This is with Ubuntu 7.10 (Gutsy). <br /> [[User:swerner|Simon]] Sat Oct 13 07:53:55 CEST 2007</div>

Swerner