Running kernel 2.4.2 :
cat /proc/ide/hdc/settings
name value min max mode
---- ----- --- --- ----
bios_cyl 89355 0 65535 rw
bios_head 16 0 255 rw
bios_sect 63 0 63 rw
breada_readahead 4 0 127 rw
bswap 0 0 1 r
current_speed 69 0 69 rw
file_readahead 0 0 2097151 rw
ide_scsi 0 0 1 rw
init_speed 12 0 69 rw
io_32bit 1 0 3 rw
keepsettings 0 0 1 rw
lun 0 0 7 rw
max_kb_per_request 128 1 127 rw
multcount 0 0 8 rw
nice1 1 0 1 rw
nowerr 0 0 1 rw
number 2 0 3 rw
pio_mode write-only 0 255 w
slow 0 0 1 rw
unmaskirq 1 0 1 rw
using_dma
--------------------%X---------------
max_kb_per_request has value 128 , but max is 127 !?
max for multcount is 8 , but my drive supports 16 sectors. ( see hdparm output below )
If I set multcount to 8 sectors ( hdparm -m 8 /dev/hdc )
then /proc/ide/hdc/settings will show :
multcount 4 0 8 rw
The values are divided by 2. Why ?
hdparm -i /dev/hdc :
/dev/hdc:
Model=IBM-DTLA-307045, FwRev=TX6OA60A, SerialNo=YMEYMML9342
Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs }
RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=40
BuffType=DualPortCache, BuffSize=1916kB, MaxMultSect=16, MultSect=off
CurCHS=16383/16/63, CurSects=-66060037, LBA=yes, LBAsects=90069840
IORDY=on/off, tPIO={min:240,w/IORDY:120}, tDMA={min:120,rec:120}
PIO modes: pio0 pio1 pio2 pio3 pio4
DMA modes: mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 udma4 *udma5
IDE interface is VIA xxx686b ( ATA-100 )
IDE driver is VIA IDE v4.3
--
David Balazic
--------------
"Be excellent to each other." - Bill & Ted
- - - - - - - - - - - - - - - - - - - - - -
Zero is a counting number. 0->255 == 1->256.
On Fri, 23 Feb 2001, David Balazic wrote:
> Running kernel 2.4.2 :
>
> cat /proc/ide/hdc/settings
>
> name value min max mode
> ---- ----- --- --- ----
> bios_cyl 89355 0 65535 rw
> bios_head 16 0 255 rw
> bios_sect 63 0 63 rw
> breada_readahead 4 0 127 rw
> bswap 0 0 1 r
> current_speed 69 0 69 rw
> file_readahead 0 0 2097151 rw
> ide_scsi 0 0 1 rw
> init_speed 12 0 69 rw
> io_32bit 1 0 3 rw
> keepsettings 0 0 1 rw
> lun 0 0 7 rw
> max_kb_per_request 128 1 127 rw
> multcount 0 0 8 rw
> nice1 1 0 1 rw
> nowerr 0 0 1 rw
> number 2 0 3 rw
> pio_mode write-only 0 255 w
> slow 0 0 1 rw
> unmaskirq 1 0 1 rw
> using_dma
> --------------------%X---------------
>
> max_kb_per_request has value 128 , but max is 127 !?
>
> max for multcount is 8 , but my drive supports 16 sectors. ( see hdparm output below )
> If I set multcount to 8 sectors ( hdparm -m 8 /dev/hdc )
> then /proc/ide/hdc/settings will show :
> multcount 4 0 8 rw
>
> The values are divided by 2. Why ?
>
>
> hdparm -i /dev/hdc :
>
> /dev/hdc:
>
> Model=IBM-DTLA-307045, FwRev=TX6OA60A, SerialNo=YMEYMML9342
> Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs }
> RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=40
> BuffType=DualPortCache, BuffSize=1916kB, MaxMultSect=16, MultSect=off
> CurCHS=16383/16/63, CurSects=-66060037, LBA=yes, LBAsects=90069840
> IORDY=on/off, tPIO={min:240,w/IORDY:120}, tDMA={min:120,rec:120}
> PIO modes: pio0 pio1 pio2 pio3 pio4
> DMA modes: mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 udma4 *udma5
>
> IDE interface is VIA xxx686b ( ATA-100 )
> IDE driver is VIA IDE v4.3
>
> --
> David Balazic
> --------------
> "Be excellent to each other." - Bill & Ted
> - - - - - - - - - - - - - - - - - - - - - -
> -
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to [email protected]
> More majordomo info at http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at http://www.tux.org/lkml/
>
Andre Hedrick
Linux ATA Development
ASL Kernel Development
-----------------------------------------------------------------------------
ASL, Inc. Toll free: 1-877-ASL-3535
1757 Houret Court Fax: 1-408-941-2071
Milpitas, CA 95035 Web: http://www.aslab.com
Andre Hedrick wrote:
>
> Zero is a counting number. 0->255 == 1->256.
I don't understand.
This doesn't explain (value) is bigger than (max).
Are you saying that (value) is counted from 1 , while
(max) ( and min too ? ) is counted from 0 ?
david
> On Fri, 23 Feb 2001, David Balazic wrote:
>
> > Running kernel 2.4.2 :
> >
> > cat /proc/ide/hdc/settings
> >
> > name value min max mode
> > ---- ----- --- --- ----
> > bios_cyl 89355 0 65535 rw
> > bios_head 16 0 255 rw
> > bios_sect 63 0 63 rw
> > breada_readahead 4 0 127 rw
> > bswap 0 0 1 r
> > current_speed 69 0 69 rw
> > file_readahead 0 0 2097151 rw
> > ide_scsi 0 0 1 rw
> > init_speed 12 0 69 rw
> > io_32bit 1 0 3 rw
> > keepsettings 0 0 1 rw
> > lun 0 0 7 rw
> > max_kb_per_request 128 1 127 rw
> > multcount 0 0 8 rw
> > nice1 1 0 1 rw
> > nowerr 0 0 1 rw
> > number 2 0 3 rw
> > pio_mode write-only 0 255 w
> > slow 0 0 1 rw
> > unmaskirq 1 0 1 rw
> > using_dma
> > --------------------%X---------------
> >
> > max_kb_per_request has value 128 , but max is 127 !?
> >
> > max for multcount is 8 , but my drive supports 16 sectors. ( see hdparm output below )
> > If I set multcount to 8 sectors ( hdparm -m 8 /dev/hdc )
> > then /proc/ide/hdc/settings will show :
> > multcount 4 0 8 rw
> >
> > The values are divided by 2. Why ?
> >
> >
> > hdparm -i /dev/hdc :
> >
> > /dev/hdc:
> >
> > Model=IBM-DTLA-307045, FwRev=TX6OA60A, SerialNo=YMEYMML9342
> > Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs }
> > RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=40
> > BuffType=DualPortCache, BuffSize=1916kB, MaxMultSect=16, MultSect=off
> > CurCHS=16383/16/63, CurSects=-66060037, LBA=yes, LBAsects=90069840
> > IORDY=on/off, tPIO={min:240,w/IORDY:120}, tDMA={min:120,rec:120}
> > PIO modes: pio0 pio1 pio2 pio3 pio4
> > DMA modes: mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 udma4 *udma5
> >
> > IDE interface is VIA xxx686b ( ATA-100 )
> > IDE driver is VIA IDE v4.3
> >
> > --
> > David Balazic
> > --------------
> > "Be excellent to each other." - Bill & Ted
> > - - - - - - - - - - - - - - - - - - - - - -
> > -
> > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> > the body of a message to [email protected]
> > More majordomo info at http://vger.kernel.org/majordomo-info.html
> > Please read the FAQ at http://www.tux.org/lkml/
> >
>
> Andre Hedrick
> Linux ATA Development
> ASL Kernel Development
> -----------------------------------------------------------------------------
> ASL, Inc. Toll free: 1-877-ASL-3535
> 1757 Houret Court Fax: 1-408-941-2071
> Milpitas, CA 95035 Web: http://www.aslab.com
--
David Balazic
--------------
"Be excellent to each other." - Bill & Ted
- - - - - - - - - - - - - - - - - - - - - -