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Date: Mon, 26 Feb 2001 20:29:49 +0100
From: David Balazic <david.balazic@uni-mb.si>
Subject: Re: weird /proc/ide/hdx/settings
To: Andre Hedrick <andre@linux-ide.org>
Cc: linux-kernel@vger.kernel.org
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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
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> 
> Andre Hedrick
> Linux ATA Development
> ASL Kernel Development
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-- 
David Balazic
--------------
"Be excellent to each other." - Bill & Ted
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