From: Andre Hedrick <andre@linux-ide.org>
To: David Balazic <david.balazic@uni-mb.si>
Cc: linux-kernel@vger.kernel.org
Subject: Re: weird /proc/ide/hdx/settings
Date: Sat, 24 Feb 2001 21:10:41 -0800 (PST) [thread overview]
Message-ID: <Pine.LNX.4.10.10102242109550.24823-100000@master.linux-ide.org> (raw)
In-Reply-To: <3A966D7D.550A631B@uni-mb.si>
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
> --------------
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>
Andre Hedrick
Linux ATA Development
ASL Kernel Development
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next prev parent reply other threads:[~2001-02-25 5:11 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-02-23 14:02 weird /proc/ide/hdx/settings David Balazic
2001-02-25 5:10 ` Andre Hedrick [this message]
2001-02-26 19:29 ` David Balazic
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