Re: Duda sobre hdparm y Kernel 2.6

[Ramiro Aceves <ea1abz@wanadoo.es>]

> > Hola Haplo
> > Te mando varias pruebas de hda y hdb:
> >
> > /dev/hda:
> > Timing buffer-cache reads:   128 MB in  0.73 seconds =174.41 MB/sec
> > Timing buffered disk reads:  64 MB in  2.45 seconds = 26.07 MB/sec
> >    
>
> Estos resultados no parecen demasiado malos, pero depende de tu disco duro. Yo 
> tengo un Seagate Barracuda UDMA-100 de 80 gigas, con mas de un año de 
> antiguedad, y la lectura desde buffer-cache da mas de 600 megas/segundo y 
> desde disco alrededor de 40.
>
> Parece que activar el multicount no es peligroso, quizas tu disco duro 
> funcione mejor con el o quizas no.
>
> Haplo
>
>
>  
Después de la copia de seguridad por si las moscas, aquí van las
pruebas, aparentemente no se obtiene ninguna mejoría :

debian-remix:/home/ea1abz# hdparm /dev/hda

/dev/hda:
multcount    =  0 (off)
I/O support  =  1 (32-bit)
unmaskirq    =  1 (on)
using_dma    =  1 (on)
keepsettings =  0 (off)
nowerr       =  0 (off)
readonly     =  0 (off)
readahead    = 256 (on)
geometry     = 65535/16/63, sectors = 78165360, start = 0
busstate     =  1 (on)
debian-remix:/home/ea1abz# hdparm -tT /dev/hda

/dev/hda:
Timing buffer-cache reads:   128 MB in  0.73 seconds =175.61 MB/sec
Timing buffered disk reads:  64 MB in  2.51 seconds = 25.45 MB/sec
debian-remix:/home/ea1abz# hdparm -m16 /dev/hda

/dev/hda:
setting multcount to 16
multcount    = 16 (on)
debian-remix:/home/ea1abz# hdparm /dev/hda

/dev/hda:
multcount    = 16 (on)
I/O support  =  1 (32-bit)
unmaskirq    =  1 (on)
using_dma    =  1 (on)
keepsettings =  0 (off)
nowerr       =  0 (off)
readonly     =  0 (off)
readahead    = 256 (on)
geometry     = 65535/16/63, sectors = 78165360, start = 0
busstate     =  1 (on)
debian-remix:/home/ea1abz# hdparm -tT /dev/hda

/dev/hda:
Timing buffer-cache reads:   128 MB in  0.74 seconds =172.77 MB/sec
Timing buffered disk reads:  64 MB in  2.46 seconds = 26.03 MB/sec
debian-remix:/home/ea1abz#

Gracias.