Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Mon, 26 Feb 2001 14:30:47 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Mon, 26 Feb 2001 14:30:37 -0500 Received: from rcum.uni-mb.si ([164.8.2.10]:8712 "EHLO rcum.uni-mb.si") by vger.kernel.org with ESMTP id ; Mon, 26 Feb 2001 14:30:22 -0500 Date: Mon, 26 Feb 2001 20:29:49 +0100 From: David Balazic Subject: Re: weird /proc/ide/hdx/settings To: Andre Hedrick Cc: linux-kernel@vger.kernel.org Message-id: <3A9AAEAD.2CEEDD2A@uni-mb.si> MIME-version: 1.0 X-Mailer: Mozilla 4.76 [en] (WinNT; U) Content-type: text/plain; charset=iso-8859-2 Content-transfer-encoding: 7bit X-Accept-Language: en In-Reply-To: Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org 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 majordomo@vger.kernel.org > > 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: www.aslab.com -- 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 majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/