max request size 1024KiB by default?

Rudo Thomas
2004-07-24T11:27:12Z

> HD info:
> /dev/hdc:
>
> Model=Maxtor 6Y160P0, FwRev=YAR41BW0, SerialNo=Y44K8TZE
> Config={ Fixed }
> RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=57
> BuffType=DualPortCache, BuffSize=7936kB, MaxMultSect=16, MultSect=16
> CurCHS=4047/16/255, CurSects=16511760, LBA=yes, LBAsects=268435455
> IORDY=on/off, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120}
> PIO modes: pio0 pio1 pio2 pio3 pio4
> DMA modes: mdma0 mdma1 mdma2
> UDMA modes: udma0 udma1 udma2 udma3 udma4 udma5 *udma6
> AdvancedPM=yes: disabled (255) WriteCache=enabled
> Drive conforms to: (null):

Hello.

I was just wondering why the default max request size is 128KiB on my drive,
which is almost the same as the one you tested?!

/dev/hda:

Model=Maxtor 6Y120P0, FwRev=YAR41BW0, SerialNo=...
Config={ Fixed }
RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=57
BuffType=DualPortCache, BuffSize=7936kB, MaxMultSect=16, MultSect=off
CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=240121728
IORDY=on/off, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120}
PIO modes: pio0 pio1 pio2 pio3 pio4
DMA modes: mdma0 mdma1 mdma2
UDMA modes: udma0 udma1 udma2 udma3 udma4 udma5 *udma6
AdvancedPM=yes: disabled (255) WriteCache=enabled
Drive conforms to: (null):

* signifies the current active mode

Thanks.

Rudo.