sslug-teknik team mailing list archive

[Tobias Kjær Tobiasen <sslug@xxxxxxxxxxx>]

Asbjørn Zweidorff Kjær wrote:
> Noget som, efter min erfaring, ofte hjælper en del, er at bruge -c1 -d1
> (-c = enable 32 bit addressing, -d = using_dma flag).

#hdparm -c1 -d1 /dev/hdd

/dev/hdd:
 setting 32-bit IO_support flag to 1
 setting using_dma to 1 (on)
 HDIO_SET_DMA failed: Operation not permitted
 IO_support   =  1 (32-bit)
 using_dma    =  0 (off)

Hvorfor må jeg ikke det?!

#hdparm -tT /dev/hda

/dev/hda:
 Timing buffer-cache reads:   128 MB in  0.37 seconds =345.95 MB/sec
 Timing buffered disk reads:  64 MB in 14.84 seconds =  4.31 MB/sec

-c1 hjalp lidt :-)


T2K