Re: Normal buildtime for a kernel?
On Thu, Mar 24, 2005 at 08:33:13AM +0100, Oliver Korpilla wrote:
> To exclude DMA as possibilty:
>
> /dev/sda:
> setting using_dma to 1 (on)
> HDIO_SET_DMA failed: Inappropriate ioctl for device
> root@bender:~# hdparm -tT /dev/sda
>
> /dev/sda:
> Timing cached reads: 2124 MB in 2.00 seconds = 1060.04 MB/sec
> HDIO_DRIVE_CMD(null) (wait for flush complete) failed: Inappropriate
> ioctl for device
> Timing buffered disk reads: 96 MB in 3.01 seconds = 31.88 MB/sec
> HDIO_DRIVE_CMD(null) (wait for flush complete) failed: Inappropriate
> ioctl for device
When the speed is over 5MB/s you have DMA on in general. Usually PIO is
2 to 3MB/s. So DMA is on, the drive just isn't that fast by todays
standards.
Len Sorensen
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