[Bug 192353] Re: 100% CPU usage during disk I/O with SATA/PATA

[Samael]

It's not an Ubuntu bug. It's linux-kernel hdd drivers bug.

Dell Inspiron 1501. AMD Sempron 3500+, Fujitsu 80 GB HDD, SATA.

 hdparm /dev/sda
/dev/sda:
 IO_support    =  0 (default) 
16-bit)
 HDIO_GET_UNMASKINTR failed: Inappropriate ioctl for device
 HDIO_GET_DMA failed: Inappropriate ioctl for device
 HDIO_GET_KEEPSETTINGS failed: Inappropriate ioctl for device

Just as you see, DMA support failed.

-- 
100% CPU usage during disk I/O with SATA/PATA
https://bugs.launchpad.net/bugs/192353
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