The system specs as the Redhat/linux/6.2 with linux-2.2.14-7.0 (
floating point fixes ) /var/log/messages has:
Mar 27 06:38:08 Java kernel: rtc: Digital UNIX epoch (1952) detected
Mar 27 06:38:08 Java kernel: PCI_IDE: unknown IDE controller on PCI bus
00 device 39, VID=1080, DID=c693
Mar 27 06:38:08 Java kernel: PCI_IDE: not 100% native mode: will probe
irqs later
Mar 27 06:38:08 Java kernel: ide0: BM-DMA at 0x1100-0x1107, BIOS
settings: hda:pio, hdb:pio
Mar 27 06:38:08 Java kernel: ide1: BM-DMA at 0x1108-0x110f, BIOS
settings: hdc:pio, hdd:pio
Mar 27 06:38:08 Java kernel: PCI_IDE: unknown IDE controller on PCI bus
00 device 3a, VID=1080, DID=c693
Mar 27 06:38:08 Java kernel: PCI_IDE: not 100% native mode: will probe
irqs later
Mar 27 06:38:08 Java kernel: PCI_IDE: port 0x01f0 already claimed by
ide0
Mar 27 06:38:08 Java kernel: PCI_IDE: port 0x0170 already claimed by
ide1
Mar 27 06:38:08 Java kernel: PCI_IDE: neither IDE port enabled (BIOS)
Mar 27 06:38:08 Java kernel: hda: Maxtor 53073U6, ATA DISK drive
Mar 27 06:38:08 Java kernel: hdb: Compaq CRD-8322B, ATAPI CDROM drive
Mar 27 06:38:08 Java kernel: ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
Mar 27 06:38:08 Java kernel: hda: Maxtor 53073U6, 29311MB w/2048kB
Cache, CHS=59554/16/63, (U)DMA
Mar 27 06:38:09 Java kernel: hdb: ATAPI 32X CD-ROM drive, 128kB Cache
Mar 27 06:38:09 Java kernel: Uniform CDROM driver Revision: 2.56
Mar 27 06:38:09 Java kernel: Floppy drive(s): fd0 is 2.88M
[root@Java gat]# /sbin/hdparm -i /dev/hda
/dev/hda:
Model=Maxtor 53073U6, FwRev=DAC10SC0, SerialNo=K60CR35C
Config={ Fixed }
RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=57
BuffType=3(DualPortCache), BuffSize=2048kB, MaxMultSect=16,
MultSect=off
DblWordIO=no, OldPIO=2, DMA=yes, OldDMA=0
CurCHS=16383/16/63, CurSects=-66060037, LBA=yes, LBAsects=60030432
tDMA={min:120,rec:120}, DMA modes: mword0 mword1 *mword2
IORDY=on/off, tPIO={min:120,w/IORDY:120}, PIO modes: mode3 mode4
UDMA modes: mode0 mode1 mode2 mode3 mode4
[root@Java gat]# /sbin/hdparm -t /dev/hda
/dev/hda:
Timing buffered disk reads: 64 MB in 20.11 seconds = 3.18 MB/sec
[root@Java gat]#
[root@Java gat]# /sbin/hdparm -u 1 -m 16 -c 1 -d 1 /dev/hda
/dev/hda:
setting 32-bit I/O support flag to 1
setting multcount to 16
setting unmaskirq to 1 (on)
setting using_dma to 1 (on)
multcount = 16 (on)
I/O support = 1 (32-bit)
unmaskirq = 1 (on)
using_dma = 1 (on)
[root@Java gat]# /sbin/hdparm -t /dev/hda
/dev/hda:
Timing buffered disk reads: 64 MB in 20.05 seconds = 3.19 MB/sec
[root@Java gat]#
Andre Hedrick wrote:
>
> Hello GAT,
>
> Can you be more specific? I need a kernel and hardware info and generally
> more info than what is given. Is this a PIO/DMA process is it a laptop or
> unsupported hardware?
>
> On Mon, 26 Mar 2001, Uncle George wrote:
>
> > I am processing sound data on /dev/dsp. Generally the ~61k devive buffer
> > is enough to keep the device satiated && gives the program time to fill
> > up the device buffer when there is 16k of buffer space that needs to be
> > filled.
> >
> > But on occasion the /dev/dsp device "slurrs" ( sounds like what happens
> > when the speed of a tape recorder slows down due to a finger placed down
> > on the capstain ) unexpectedly. This was eventually traced to the usage
> > of an IDE disk drive. using the scsi drive does not cause the problem to
>
> How did you derive this path to the ATA driver?
> What is the drive, and how fast (or how slow) is it?
>
> > manifest itself( at least my ears say so ). but using "dd if=/dev/hda4
> > of=/dev/null ) does immediately cause the slurring to happen.
> >
> >
> > I think I can create a simple pgm to demo this problem, but the DATA
> > file that gets feed into /dev/dsp is a little large for e-mail.
>
> The content of the barf is not important, but the process you are doing to
> create this issue is.
>
> Andre Hedrick
> Linux ATA Development
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